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DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
DXM Product Overview
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DXM Product Overview

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  • 1. DXM Product Overview ZK Celltest, Inc. 3180 De La Cruz Blvd., Suite 201 Santa Clara, California 95054 (Tel) 408.986.8080 (Fax) 408.986.8178 http: www.zk.com e-mail: kurt@zk.com Release Date: April 28, 2003
  • 2. Table of Contents Applications ................................................................................3 Features & Benefits ....................................................................3 Defining the Problem ..................................................................5 The Solution ...................................................................................................6 PC Based vs. Non-PC Based Field Test Products ......................8 Configurations ..........................................................................10 DXM Vehicular ............................................................................................11 DXM Portable ..............................................................................................12 DXM Block Diagram ................................................................13 Operation & Screens .................................................................14 Summary of Data Screens ............................................................................14 SAM-ALL Screens ......................................................................................15 TDMA Technology ...............................................................................................15 TDMA Summary .......................................................................................15 TDMA Neighbor Screen ............................................................................16 TDMA Top Neighbor Screen ....................................................................17 TDMA Hand-Off Screen ...........................................................................18 TDMA Status Screen .................................................................................19 GSM Technology ..................................................................................................20 GSM Summary Screen ..............................................................................20 GSM Data Screen (GPRS/EDGE Testing) ...............................................21 GSM Neighbor Screen ..............................................................................22 GSM Handoff Screen ................................................................................22 GSM Status Screen ....................................................................................23 GSM Over-the-Air Messages ....................................................................23 CDMA Technology ..............................................................................................24 CDMA Summary Screen ...........................................................................24 CDMA Data Screen (1xRTT/CDMA2000 Testing) ...................................25 CDMA Pilot Sets Screen - Active, Candidate and Neighbor Set ..............26 CDMA Missing Neighbors/Pilot Pollution Screen ...................................26 CDMA Handoff Screen .............................................................................27 CDMA Status ............................................................................................28 CDMA Over-the-Air Messages .................................................................29 Cellname (CDMA and GSM) ....................................................................29 Scanning Screens ..................................................................................................30 Adjacent Channel Interference Screen .....................................................30 GSM Coverage ..........................................................................................31 CDMA Coverage .......................................................................................31
  • 3. Control A/B Bar Graph .............................................................................32 AMPS Control A (same for Control B) .....................................................33 Cellular DCCH A ......................................................................................33 Cellular DCCH B ......................................................................................34 PCS DCCH A ............................................................................................34 PCS DCCH B through F ...........................................................................34 SAM-ALL Playback ....................................................................................34 Start at Beginning .................................................................................................35 Start at Time Stamp. . . .........................................................................................35 Start Playback at Marker .......................................................................................36 Select Channel Data Screens ........................................................................36 Audio Quality Measurements ......................................................................37 Export Log Memory .....................................................................................37 Conclusion ................................................................................38
  • 4. DXM ProductOverview 3 Applications The DXM products are designed to assist engineers and technicians to identify the cause and fix network problems. Listed below are typical net- work problems the DXM can be used to diagnose and fix. • Poor coverage • Adjacent channel interference • Co-channel interference • Dropped calls • Blocked calls • Noisy calls • High bit/frame error rate • Poor audio quality • Improper handoffs • Improper system balancing • System comparisons Features & Benefits Feature:Monitors multiple phones simultaneously. Can measure multiple technologies. Benefit:Multiple systems can be tested at once or multiple phones set up on the same system can collect more data and find problems faster. Phones can be switched to cover multiple technologies for troubleshooting multiple network types. Feature:Up to 15 days of internal log memory with Compact FLASH removable memory card. Benefit:No need to carry around a PC to collect data. Feature:Wireless modem option transmits data automatically to a centrally located server. Benefit:The data is always there when you need to analyse it. Feature:Dual high speed cellular and PCS scanners. Benefit:Simultaneously measure coverage and interference for cellular and PCS bands. Measure coverage of test transmitters to identify optimum cell site locations.
  • 5. 4 ZK Celltest, Inc. Feature: Self-contained unit with LCD display and internal memory. Benefit: No need to drag along a PC. Starts up when you start the vehicle. Takes a few seconds to boot up. Operates in extreme environmental condi- tions. Display can be mounted on the dashboard for easy and safe viewing. Feature:Software and hardware is designed and manufactured by ZK Cell- test. Benefit: Product cost is low which translates into a lower price without sac- rificing capability. Product quality can be measured, controlled and modi- fied. Feature:Internal GPS option. Benefit:No external box to deal with just connect the magnetic mount GPS antenna and place it on your vehicle. Logs position data allowing you to plot the data with MapInfo. Feature:Logs data in ASCII format. Benefit:Easily import file into Excel, MapInfo or other post-processing programs. Feature:Monitor call follow information. Benefit:Identify system problems as experienced by the typical user. Feature:Display and log handoff events, blocked calls and dropped calls. Benefit:Identify network quality problems as they occur and log them for post-processing. Monitor cellular to PCS and PCS to cellular handoffs as well as digital/analog handoffs. Feature:Display and log cellular and PCS neighbor channel data. Benefit:Verify the neighbor list is being by the phone correctly. Verify handoff to correct neighbor at correct signal strength and error rate levels. Feature:Handoff screen displays information on the most recent handoffs. Benefit:Verify handoff setting thresholds. Check before and after signal strength, power level and BER data for identifying improper handoffs. Ver- ify correct cell/sectors for handoffs. Feature:Portable configuration available. Benefit:Identify problems and optimize performance inside buildings, con- vention centers, sports arenas, public walkways, shopping malls, parks, etc.
  • 6. DXM ProductOverview 5 Feature:Interface to standard handsfree kit. Benefit:Monitor audio through external speaker. Phone and handsfree kit function as normal. Feature:Custom headset with connection. Benefit:Talk and listen through a modified headset/microphone and moni- tor system performance. Use in high noise environments in vehicles or for in-building measurements. Feature:Technical support calls handled by top level managers and devel- opment engineers. Benefit:You always get a support person that knows what they are talking about and has a vested interest in solving your problem. Defining the Problem During the implementation of wireless technology large and expensive test equipment was needed to troubleshoot problems in the real world environ- ment. The implementation phase occurs prior to commercial announce- ment of the network and prior to paying subscribers using the system. Most of the major wireless carriers are well past the implementation phase and have a large number of paying subscribers on their networks. The wire- less technology has for the most part been proven to work effectively in live systems. Carriers are now in the ongoing phase of optimizing and upgrading their networks in order to improve quality, add services and increase capacity and coverage. Most of the network problems that degrade quality and limit capacity have been identified. These problems cause sub- scribers to experience poor audio quality, dropped calls and blocked calls among others. The current problem in the optimization phase is not to identify new net- work type problems but rather to identify where and when the known prob- lems occur. The infrastructure diagnostics provide very good information in helping to identify these problems but it can not provide the complete picture. Most network problems occur as a result of the interaction between multiple sites and the measurements must be taken in the locations between sites. This is where the subscribers use the handsets and where they experi- ence the problems.
  • 7. 6 ZK Celltest, Inc. The Solution QUESTION: What is the most efficient and effective way to fix wireless network problems? ANSWER: Before a problem can be fixed it must be found and duplicated in order to collect the appropriate data to successfully identify the cause. METHODS: The carriers typically choose a proactive approach and con- tinuously drive test the system in order to find and fix problems before they affect a significant number of subscribers. This method is typically the cho- sen method among carriers because it maintains a higher level of quality and maintains and increases air time revenues. QUESTION: What is the best drive testing method to identify and solve as many problems as possible in as short a time frame as possible? Or, how do you reduce the cycle time of finding and solving problems using existing personnel and within the real world budget requirements for equipment purchases? ANSWER: You can either use the rifle approach or the shotgun approach. The rifle approach utilizes a few highly equipped, complicated testing sys- tems that claim to root out every possible known and unknown problem. The shotgun approach utilizes many low cost, intuitive test products that identify a large majority of known problems. The rifle approach has the advantage of identifying and solving new and difficult problems but the disadvantage of requiring a highly trained engineer and temperamental and complicated test equipment. The shotgun approach has the advantage of identifying and fixing many more known problems quickly. (i.e., the more test products searching for problems the more problems will be found and solved) By equipping every engineer, technician and manager with a low cost test product a majority of the known problems can be solved quickly. If and when a new and difficult problem is identified then the higher end, more expensive equipment can be brought in to solve the problem. This com- bined method makes the most efficient and effective use of the low cost and high cost field testing products. In addition, this combined method makes the best use of the people doing the work. Cell site technicians drive their regions on a daily basis visiting each cell perhaps once every two or three days. Many of the re-occurring problems can be identified and solved within the Operations group. System
  • 8. DXM ProductOverview 7 Performance and/or RF Engineering can be called in for system level or unknown problems that have been identified by Operations. Data collected by the Operations technician can be forwarded to the System Performance or RF Engineering groups for more detailed analysis and problem solving techniques. This method makes the best use of time for the people in the organization and allows them to work together as a team. Very often the data that is collected by the Technicians is never shared with System Performance or Managers. With ZK’s wireless modem option the data can automatically be transmitted back to a central server for everyone to analyse.
  • 9. 8 ZK Celltest, Inc. PC Based vs. Non-PC Based Field Test Products There is a wide range of choices for field testing equipment. They can be categorized into two basic groups; PC based and Non-PC based products. PC based products use a laptop computer or a display and keypad running PC software such as Windows 95 or 98. Non-PC based products use an embedded microprocessor design and a custom display and keypad. There are advantages and disadvantages to each. Each has their place for its par- ticular application. The following table shows some of the advantages of a non-PC based field testing product. Feature Advantages Small display • Mounted on the dash for safe viewing while driving • Mounts out of the way of the air bag system for safety • Transflective display viewable in direct sunlight • Designed for wide temperature ranges • Requires only one person to drive and operate equipment Few number of keys • Simple to operate in a vehicle Permanently installed in • Turns on with auto ignition vehicle • No need to disconnect at night and reconnect in the morning • No threat of theft • Always on and collecting data even when driving the kids to school Embedded operating • Boots up in 3 seconds system • Rarely crashes • On board memory more reliable than hard disk drive • Designed to operate in wide temperature and humidity ranges • Designed for simplicity of operation Compact size • Easy to install • Transportable from vehicle to vehicle Data Logging • Always logging data internally without need for PC GPS receiver • Embedded GPS receiver requires no additional cables Value/Cost • Lower in cost allowing many people to be equipped and identify and solve many known CDMA problems in a short cycle time Portable configuration • Use for in-building analysis
  • 10. DXM ProductOverview 9 Non-PC based products are ideally suited for equipping all system per- formance, engineering, operations and management personnel in order to quickly identify and solve problems in the network before a large number of subscribers experience them. PC-based systems are better suited for solving higher level network problems due to their cost and complexity. How ZK Celltest Can Help The DXM System Access Monitor is designed to be a low cost, high per- formance field measurement and troubleshooting tool for wireless net- works. It is used by Operations, System Performance and Engineering personnel to optimize and maintain a wireless network. By equipping the DXM with a wireless modem collected data is automati- cally sent in real-time to a central server where all people in the organiza- tion can analyse it. The DXM is based on ZK Celltest’s DX hardware and software platform. This platform has been field proven for many years. It has proven to be an extremely reliable product. The DXM fits into our strategy of providing products that are easy to use and understand, lightweight, small and portable, price conscious and relia- ble. Our support staff is dedicated to keep you and your DXM up and run- ning with the newest features and upgrades.
  • 11. 10 ZK Celltest, Inc. Configurations This overview covers the DXM product line. The following table shows the hardware configurations and options for the DXM. The base model comes with a single phone port and single technology plus EAMPS. TABLE 1: HARDWARE CONFIGURATIONS Configurations/ Description Options V Vehicular Configuration P Portable Configuration 2, 3, 4, 5, 6 2, 3, 4, 5, 6 phone ports PN8 800MHz PN Scanner PN19 1900MHz PN Scanner RG Quad band GSM/BSIC Scanner R8 800MHz TDMA CW scanner R19 1900MHz TDMA CW scanner T TDMA technology C CDMA technology G GSM technology X 1xRTT technology R GPRS technology I iDEN technology MC8 800MHz wireless modem MC19 800MHz wireless modem GP GSP Receiver
  • 12. DXM ProductOverview 11 DXM Vehicular On/Off Contrast Control DXM SAM BREAK BREAK ENTER ENTER DXM SAM Connect up to 3 phones simultaneously Display Controller Contrast Control On/Off Antennas: GPS Input/Output Modem 800 1900 MHz MHz Power +12VDC - Red Ignition Sense - Yellow Pwr Phone 1 Phone 2 Phone 3 Ground - Black (Fuse taps and fuses included in installation kit)
  • 13. 12 ZK Celltest, Inc. DXM Portable Front Compact Flash Compact Flash BREAK DXM BREA K SAM ENTE R ENTE R Battery Rear GPS On/Off 800 1900 MHz MHz Phone 1 Phone 2 Phone 3 Pwr Power A fully charged battery will typically provide about 6-8 hours of power. A rechargeable, external slim-line battery can be purchased as an option and will provide an additional 6-8 hours each. If the battery is fully drained it typically takes about 8 hours to fully charge the unit.
  • 14. DXM ProductOverview 13 DXM Block Diagram A block diagram of the DXM is shown below. The vehicular and the porta- ble DXMs are essentially the same hardware and software except the port- able is contained in a single enclosure and has a removable battery and a carrying case. The vehicular comes in two separate enclosures and includes a handsfree kit for the desired technologies. Display Battery Processor Keypad Separate Board enclosure iDen for vehicular CF GSM Memory CDMA GPS TDMA Wireless DSP Modem Audio Scanners Quality To phones or handsfree kits The dashed squares represent options. Multiple scanner options are availa- ble depending on the desired technology. A GPS receiver logs the position for post-process mapping analysis and for identifying the cellname. An optional wireless modem automatically transfers the collected data to a central server. This ensures that the drive test data gets to the right spot and can be analysed by other people in the company. An optional DSP board provides MOS measurements for audio quality.
  • 15. 14 ZK Celltest, Inc. Operation & Screens Summary of Data Screens The summary table shown below shows all possible data screens for the DXM. TABLE 2: SUMMARY OF DXM DATA SCREENS Screen Name Summary Available in all DXM models Data Testing Requires 1xRTT (X) and/or GPRS (R) technology option and corresponding CDMA and/or GSM technology option neighbors/Pilot Sets Available in all DXM models Top Neighbors Available in all DXM models Handoffs Available in all DXM models Messages Available for CDMA and GSM only Interference Requires R8, R19 or RG scanner Status Available in all DXM models CDMA Pilot Pollution/Missing Requires PN Scanner and CDMA option neighbor * Top PNs Requires PN8 or PN19 Scanner and CDMA option GSM Missing neighbor Requires RG scanner GSM Coverage Requires RG scanner 800 MHz TDMA Coverage Requires R8 Scanner 1900 TDMA MHz Coverage Requires R19 Scanner Select Channel Mode Requires R8 or R19 Scanner
  • 16. DXM ProductOverview 15 SAM-ALL Screens In SAM-ALL mode the DXM follows the state of the phone and scans for coverage and interference with the scanning receiver. TDMA Technology TDMA Summary Note: Adjacent channel data and top control channels are not present on the ZOOM Summary screen of units without scanning receivers. Interference Data Zoom Line Control Channel Data Band Indicator c 1009A E2 83dBm 162 DVCC PL 4 BER 0 c1010 D2 93db C/I +10db A: 314 93db c1008 F2 90db C/I +07db B: 353 83db c695A C2 0db 64dvcc N1 : c 695 -99db 17 : 51 : 31 T70 N1 DVCC: 64 Adjacent Channel C/I Prior Channel Hand-Off Data Strongest Neighbor Cell Data The Zoom Summary data screen is the most popular screen because it sum- marizes all the data collected by the DXM.
  • 17. 16 ZK Celltest, Inc. TDMA Neighbor Screen Band Indicator c DVCC 1009A E2 83 db 162 PL 4 BER 0 Strongest c 715 153 87 c 693 43 99 p 992 153 103 neighbor c 708 153 85 c 992 162 107 p 997 97 c 695 111 101 c1002 43 101 p 999 99 c 711 162 87 c 686 111 95 p 705 93 Neighbors 12:21:52 M08 RSSI --> Channel Number RSSI DVCC Indicates more neighbors on another screen When a neighbor list message is sent to the phone by a cell site, the phone uses the list to measure the signal strength of the neighboring cells. The DXM picks up the neighbor cell measurements from the phone and shows them on this screen. A hand-off is imminent when the signal strength of the neighbor cell site becomes stronger than the RSSI of the active channel shown in the zoom row. If there are more than twelve neighbor channels in the list, the DXM will automatically add a second screen displaying the additional neighbor chan- nels. The user can switch between the two screens by using the left/right arrow keys. An arrow in the bottom right corner of the screen shows which arrow key to press to view the other Zoom neighbor screen.
  • 18. DXM ProductOverview 17 TDMA Top Neighbor Screen Active Phone Channel Data Row Neighbor Phone Channel Data Band Indicator CHAN SET RS CC PL BE TA M00 c 711A A1 79 162 2 0 -40 c 996 D1 79 153 -50 p 715 D2 91 153 -60 p 999 A1 95 162 -70 c 693 E2 99 162 -80 c 992 A2 99 162 -90 Top Neighbors 04:46:10 M62 dBm 1 3 5 This screen is similar to Zoom neighbor Screen, except that it lists the top five neighbors in order of signal strength.
  • 19. 18 ZK Celltest, Inc. TDMA Hand-Off Screen When a hand-off fails, the user can lose the call. This screen is a handy tool for optimizing the location and nature of hand-offs between adjacent cell sites and for detecting hardware errors within the sites. The Hand-Off screen is unique when compared to other DXM screens, because it offers a robust, multi-mode line graph feature with optional viewing modes for: • Signal Strength (RSSI) • Transmit Power (PL) • Bit Error Rate (BER) Examples for all three graph modes are shown below, with a summary of their screen elements. Phone Hand-Off Screen in Signal Strength Graph Mode Bit Error Rate and delta Bit Error Rate Power Level and delta Power Level Color Code delta RSSI Normal video - Voice channel RSSI Signal Strength Line Graph Channel Set Channel Cellular to CHAN SET RS dR CC P B 30 32 34 M00 PCS handoff p695B 93 64 2 0 -40 c711C C2 109 +3 64 0 0 -50 c695A C2 109 -4 64 +1 0 -60 c1009A E2 87 0 48 0 0 -70 c15A D3 87 0 128 0 0 64 -80 c1009A E2 109 0 48 -1 0 64 -90 Handoffs 12 : 16 : 34 dBm Band Indicator Inverse video - control channel DVCC or Set of new channel Also indicates hand-off point
  • 20. DXM ProductOverview 19 TDMA Status Screen This text-only screen is a handy quick reference for identifying miscellane- ous information. When equipped with the GPS option, the DXM displays the GPS position as follows: • Latitude Coordinates (degrees decimal, up to four deci- mal places with the hemisphere indicator. Example: Latitude: 37.3810N) • Longitude Coordinates (degrees decimal, up to four deci- mal places with the hemisphere indicator. Example: Longitude: 121.9414W) Private System ID Network Type NetType: Pb Pr Rs SID: 31 Phone Type: Nokia 51/61XX PSID1: PSID2: PSID3: Latitude: 121.3801W PSID4: Longitude: 37.9801N RSID: Status 4:46:10 Date: 1999-09-14 M16 Public System ID Phone Type Residential System ID
  • 21. 20 ZK Celltest, Inc. GSM Technology GSM Summary Screen The following shows measured data for GSM. p 677A H 1 -83 dBmF 39 PL 0 QF 3 BSIC CID 25773 TA: 3 RLT:16 C1:6 N1: p680 -96dBm BSIC 56 p677B -1dBm -96dBm BSIC 39 P1 Zoom Summary 15:39:58 M77 Channel prior to handoff Parameters shown are as follows: • p - Hyperband (p=1900MHz) • 677 = channel number (ARFCN or BCCH) • A = Time slot (0=A, 7=G) • H=Hopping sequence number (1 in above example) • dBmF=RSSI Full (-83) • BSIC (Base Station Identifier Code)=39 • PL (Mobile Transmit Power)=0 • QF (RxQUAL - Audio quality measurement)=3 • CI (Cell Identity)=25773 • TA (Timing Advance)=3 • RLT (Radio Link Timeout)=16 • C1 (Path Loss)=6 • N1 (Strongest Neighbor)
  • 22. DXM ProductOverview 21 GSM Data Screen (GPRS/EDGE Testing) The GSM/GPRS/EDGE Data Test screen shows the standard GSM zoom line on top with the data testing elements below. Three data tests are con- ducted and repeated if desired; FTP-Upload, FTP-Download and HTTP Download. The data testing settings are defaulted to the ZK Servers. Settings can be changed to the customer’s ftp and http servers via the menu commands. P 677A H 1 -68 dBmS BSIC 39 PL 0 QS 3 IP: 190.155.155.68 Test: FTP-Upload KB/sec: Avg=3.95 Current=2.97 Peak=5.20 Bytes Transferred: 55600 of 102400 Fails: test=2(14%) P1 Data Test 23:07:42 M99 M10 Screen Elements Zoom Line: Same as GSM Summary screen. Connection Status: Four call states are displayed: Dialling: The phone is dialling. Connecting: PPP link is establishing. IP: Displays the IP address of the remote computer when con- nected. Terminated: Call was terminated. Logs Along with the standard information logged on the wireless traffic channel the DXM also logs the end-to-end data throughput and the status of the PPP link. For detailed log file formats see the DXM Manual Appendix A.
  • 23. 22 ZK Celltest, Inc. GSM Neighbor Screen The following screen shows the GSM carrier information in large charac- ters and the first 12 neighbors with their BSIC and signal strength. p 677D H 1 -92 dBmF 47 BSIC PL 0 QF 7 Wabash 680 70 -87 41st 665 40 -95 Lakewood 682 07 -90 Airport 673 60 -97 Vernon 667 55 -93 Downtown 664 56 -98 Cellname P3 Zoom Neighbor 12:21:52 M08 Channel BSIC RSSI Selecting the RIGHT arrow key shows additional neighbors if they exist and the UP/DOWN arrow keys switch between RSSI and delta RSSI. GSM Handoff Screen The following screen shows the serving channel and the previous 5 hand- offs. Pressing the UP/DOWN arrow keys changes the graph between RSSI, RxQUAL and Mobile Transmit Power (PL). CHAN HSN RS dR CC P Q 30 32 34 M90 p695B 33 93 54 2 3 -40 p711D 10 109 +3 54 0 10 -50 p695A 21 109 -4 54 +1 -60 p609A 32 87 0 48 0 -70 p615A 14 87 0 28 0 54 -80 p709A 55 109 0 48 -1 54 -90 P1 Handoffs 12 : 16 : 34 dBm
  • 24. DXM ProductOverview 23 GSM Status Screen The GSM status screen shows ID information about the network, phone type and position. MCC: 310 Phone Type: Nokia 6190 MNC: 17 LAC: 235 CI: 25771 Latitude: 121.3801W Longitude: 37.9801N P1 Status 4:46:10 2002-01-14 M85 GSM Over-the-Air Messages Over-the-Air messages are displayed and logged. The data section of the Over-the-Air message will be logged and the most important part of the data section will be translated to english and displayed in the Info column. Data portion of key messages are decoded mm:ss Class/Type Info 46:26 F/Order Release_Order 46:26 R/Order Release_Order 46:17 R/Order MS_Ack 46:17 F/NbrListUpd 46:16 R/HOComplete 46:16 R/Order MS_Ack Messages 10:46:26 M57 M10 Arrow indicates additional messages to view Use arrow keys to scroll back and forth to view messages While in realtime (SAM-ALL) mode or Playback mode the up/down arrow keys can be used to scroll backward and forward to view the last 40 mes- sages. However, all of the Over-the-Air messages are logged to memory for Playback or post-processing.
  • 25. 24 ZK Celltest, Inc. CDMA Technology CDMA Summary Screen An example of the CDMA Zoom Summary screen is shown below. The zoom line on top displays channel information. Up to three additional zoom lines will be displayed with the Active Set cell name, PN code and Ec/Io. If there is only one or two active set members the third row will dis- play time and GPS information. When the phone is idle listening to the paging channel, the top zoom line will be light on dark. When it is on a traffic channel it will be dark on light. The next three zoom lines are the PNs in the active set with their corre- sponding cell name, PN code and Ec/Io value. The PN with the strongest Ec/Io will be light on dark. If more than 3 actives are present the large char- acters will change to small characters in order to display them on the same screen. They will revert back to large characters automatically when the number of actives goes to 2. The right side displays up to 5 candidates/neighbors with their cell names, PN codes and Ec/Io values. Candidate set members will be displayed as light characters over a dark background in order of strongest to weakest Ec/ Io. Then the neighbor set members will be displayed as dark characters over a light background in order of strongest to weakest Ec/Io. Up to eight characters are available for the cell name. This information is entered into an ASCII table via a PC and Download into the DXM. Freq Channel RSSI Tx Power Tx Gain Adj. FER Strongest PN: Light on Dark P Rx Tx Tx Strongest 50 -68 -23 AGC Pwr Adj -11 5 FER Candidates Light on dark name5 212 -17 3rd St. 15 -3 name6 33 -22 name7 64 -23 Strongest Hwy101 351 -15 name8 156 -26 Neighbors Lat: 37.9188N name9 133 -30 Dark on light Zoom Summary Lon: 121.1212W 23:07:42 Active Set: Cell Name, PN, Ec/Io When there are three active set members the third active set member will be displayed where the screen name and GPS information would normally appear.
  • 26. DXM ProductOverview 25 CDMA Data Screen (1xRTT/CDMA2000 Testing) The CDMA Data Test screen shows the standard CDMA zoom line on top with the data testing elements below. Three data tests are conducted and repeated if desired; FTP-Upload, FTP-Download and HTTP Download. The data testing settings are defaulted to the ZK Servers. Settings can be changed to the customer’s ftp and http servers via the menu commands. C 425 Rx AGC -68 Tx Pwr -23 Tx Adj -11 FER 5 IP: 190.155.155.68 Test: FTP-Upload KB/sec: Avg=3.95 Current=2.97 Peak=5.20 Bytes Transferred: 55600 of 102400 Fails: test=2(14%) P1 Data Test 23:07:42 M99 M10 Screen Elements Zoom Line: Same as CDMA Summary screen. Connection Status: Four call states are displayed: Dialing: The phone is dialing. Connecting: PPP link is establishing. IP: Displays the IP address of the remote computer when con- nected. Terminated: Call was terminated. Logs Along with the standard information logged on the wireless traffic channel the DXM also logs the end-to-end data throughput and the status of the PPP link. For detailed log file formats see the DXM Manual Appendix A.
  • 27. 26 ZK Celltest, Inc. CDMA Pilot Sets Screen - Active, Candidate and Neighbor Set The Pilot Sets screen displays the Active Set, Candidate and Neighbor Set member PN’s and corresponding Ec/Io. The highlighted items have the strongest Ec/Io values for each of the three sets (Active, Candidate, neigh- bor). A sample screen is shown below. If no signal is present for the neigh- bors than the Ec/Io field is blank. Strongest PN in each category is highlighted ACTIVES CANDIDATES NEIGHBORS 15 -4 261 -13 351 -13 372 402 183 -11 3 -24 30 -24 207 351 -12 183 -9 345 Rss: -65 198 -23 66 -22 TxP: -20 216 -21 225 -21 FER: 3 384 -27 396 -14 PilotSets 12 : 16 : 34 75 Blank Ec/Io indicates no signal present The RSSI, TxPower and FER fields will be replaced for calls with 4, 5 or 6 active set members. CDMA Missing Neighbors/Pilot Pollution Screen If the user has the PN8 and/or PN19 scanner option in stalled then the PN scanner can be programmed to follow a call in progress on another CDMA phone connected to another DXM phone port. This screen displays PN that are strong enough to be in the neighbor list but are not and displays PNs that are pilot polluters. P 50 Agg E/Io -4 Tx Pwr -23 Tx Adj -11 FER 5 Polluter PN PH SC Missing Nbr PN SC Downtown 15 -04 -06 Trimble 15 -09 Metro_st 381 -09 -07 Airport 381 -10 Uptown 183 -08 Train_St 183 -11 P3 PnScan TDrop: -13 Th: -4 23:07:42 M99 M10
  • 28. DXM ProductOverview 27 CDMA Handoff Screen The following display shows the current channel information updated in real-time in the top row with the 5 most recent handoffs in the following rows. A CDMA handoff is defined as an addition or deletion from the Active Set or a change in the frequency channel. This display shows analog and CDMA handoffs. Dark characters over a light background indicates a voice channel and light characters over a dark background indicates a con- trol or paging channel. mm:ss Chan Rs PN1 E1 PN2 E2 PN3 E3 Pw F P/S RSS d 26:32 p 50 -67 351 -4 28 -13 408 -12 -18 0 26:28 p 50 -65 351 -4 28 -11 0 26:22 p 50 -75 28 -7 0 26:20 p 50 -75 351 -8 26:10 c 347 -76 SET=G2 DCC=2 26:03 c 585 -80 SET=G2 SAT=1 Handoffs 12 : 26 : 33 Use up/down keys to scroll and view the previous 40 handoffs Two handoff rows are used to represent 4, 5 or 6 way handoffs. Two rows represent a 4-way handoff PN 48 with Ec/Io of -13 is the 4th active set member mm:ss Chan Rs PN1 E1 PN2 E2 PN3 E3 Pw F 26:32 p 50 -69 351 -6 28 -10 408 -11 -11 1 48 -13 26:32 p 50 -67 351 -4 28 -13 408 -12 -18 0 26:28 p 50 -65 351 -4 28 -11 26:22 p 50 -75 28 -7 26:20 p 50 -75 351 -8 Handoffs 12 : 26 : 33 The parameters are defined as follows: • mm:ss - minutes:seconds • c, p - Hyperband indicator, c for cellular, p for PCS • CHAN - Channel number for analog, Frequency Channel for CDMA
  • 29. 28 ZK Celltest, Inc. • Rs - RSSI on analog channel and Receive AGC for CDMA in units of dBm. First row is current information and prior rows are values just prior to handoff. • PN1, PN2, PN3 - Active Set PNs • E1, E2, E3 - Corresponding Ec/Io for active set. First row is current information and prior rows are values just prior to handoff. • P - Power Level for analog, Transmit power for CDMA • F - Frame Error Rate for CDMA CDMA Status The following display shows status and miscellaneous information. Phone Type: QCP-2700 SID: 4183 Phone Mode: CDMA NID: 0 Latitude: 37.9801N Longitude: 121.2322W Status M16 4:46:10 Date: 11-19-1998 The DXM automatically recognizes the phone model and displays it.
  • 30. DXM ProductOverview 29 CDMA Over-the-Air Messages Over-the-Air messages are displayed and logged. The data section of the Over-the-Air message will be logged and the most important part of the data section will be translated to english and displayed in the Info column. Data portion of key messages are decoded mm:ss Class/Type Info 46:26 F/Order Release_Order 46:26 R/Order Release_Order 46:17 R/Order MS_Ack 46:17 F/NbrListUpd 46:16 R/HOComplete 46:16 R/Order MS_Ack Messages 10:46:26 M57 M10 Arrow indicates additional messages to view Use arrow keys to scroll back and forth to view messages While in realtime (SAM-ALL) mode or Playback mode the up/down arrow keys can be used to scroll backward and forward to view the last 40 mes- sages. However, all of the Over-the-Air messages are logged to memory for Playback or post-processing. Cellname (CDMA and GSM) The DXM allows you to store a maximum of 1500 cellnames. These cell- names will be displayed on the Zoom Summary screen and logged in mem- ory. They are designed to help the user identify the channel source easily. The Cellname feature allows the user to define their own names of the cell or sector for CDMA and GSM channels only. A table is provided that stores the cellname information. Default tales are pre-loaded into the DXM. This table can be exported to a PC to use as a template for editing and imported back into the DXM. The name of the cell or sector will be displayed based on its PN or BSIC and hyperband. If more than one cellname has the same PN or BSIC and hyperband then the unit performs additional comparisons. For non-GPS DXM units, cell- names with the same PN or BSIC can be distinguished by comparing the BASE_ID or Cell_ID transmitted over the air to the BASE_ID or Cell_ID
  • 31. 30 ZK Celltest, Inc. entered in the cellname table. However, the BASE_ID or Cell_ID informa- tion is only transmitted on the paging channel, thus this feature will not work for traffic channels. In addition, the correct BASE_ID or Cell_ID val- ues must be entered into the cellname table and loaded into the DXM. For GPS-capable units, the BASE_ID or Cell_ID and the GPS location of the DXM are used to distinguish between cellnames with the same PN or BSIC. However, for the GPS search function to work correctly, the user must input the GPS position of the cells in the cellname table and the DXM must have a GPS fix. In the ZOOM Summary screen the cellname will be displayed for the active set members and the top 5 candidate/neighbor cells. The user can create their own cellname table by exporting the default table and using it as a template with a text editor, adding their desired cellnames. Up to 8 characters can be displayed and logged for the cellname. Scanning Screens Adjacent Channel Interference Screen When cellular callers complain about noisy or crackly calls, a possible cul- prit is interference from a strong adjacent channel signal level. The Inter- ference data screen shows the adjacent channel interference levels that are below the user selectable threshold. Lower Adjacent Band CHAN SET RS CC CI P B M99 Indicator -40 Time c 995 E1 95 +10 -50 Last Instance c 996A D1 85 153 2 0 -60 04:46:05 interference c 997 C1 100 +15 -70 occurred -80 Interference 4:46:10 -90 2 dBm Upper Adjacent
  • 32. DXM ProductOverview 31 GSM Coverage The user can load up to 200 channels per band/per hyperband for the GSM scanner to scan. For the RSSI levels above a user-defined threshold the BSIC will be decoded. The following screen will display the 6 strongest channels and BSICs on the left and the strongest over time on the graph on the right. Up to 21 of the strongest channels can be logged. M99 46 50 # Chan BSIC RSSI 1 p 12 03 -50 -40 2 p 23 22 -55 -50 3 p 34 14 -63 -60 -70 22 3 4 p 45 53 -78 -80 5 p 56 42 -85 -90 6 p 67 33 -90 dBm GSM PCS A 1 3 5 4:51:10 CDMA Coverage The scanner can be programmed to scan user-defined carriers and bands. All the PNs will be scanned and the 6 strongest will be displayed and the top 21 will be logged. The following screen will display the 6 strongest PNs on the left and the strongest PN over time on the graph on the right. Up to 21 of the strongest PNs can be logged. # PN E/Io M99 46 50 1p 2 -06 -05 2 p 23 -08 -10 3 p 44 -11 -15 23 2 -20 4 p 15 -13 -25 5 p 36 -14 -30 6 p 17 -14 dBm PCS DCCH A 1 3 5 4:51:10
  • 33. 32 ZK Celltest, Inc. Control A/B Bar Graph Note: Available on DXM with R8 receiver only. Also, this screen is only displayed when both the cellular A and B analog control channel scanning is selected. The Control A/B Bar Graph data screen shows the environment found by the DXM R8 scanner, and is ideally suited for viewing instantaneous meas- urements of all A and B band EAMPS System control channel RSSIs. This data screen is typically used when evaluating coverage and competi- tive analysis. It shows both System A and System B analog cellular control channels. Results Group System A Bar Graph 1st 2nd 324 / 90 M00 353 / 87 324 0 323 0 -60 324 0 314 0 -70 322 0 327 0 -80 353 2 336 0 -90 342 2 337 0 -100 342 2 337 0 -110 11 : 00 : 34 315 320 325 330 dBm 335 340 345 350 System B Bar Graph
  • 34. DXM ProductOverview 33 AMPS Control A (same for Control B) Note: Available on DXM with R8 Scanning receiver. The AMPS Control A Only data screen is used for viewing instantaneous measurements of all the A band analog cellular control channels and the strongest control channel RSSI over a period of time. It is ideal for gather- ing data while the user is on the move between one or more cell site areas. Bar Graph Line Graph 1st 2nd 330/ 65 M99 44 46 45 50 330 0 316 0 -40 330 0 316 0 -50 330 0 316 0 -60 330 0 316 0 -70 330 0 316 0 -80 330 0 316 0 -90 30 315 320 325 330 dBm AMPS CCH A 4:51:10 Results Groups Cellular DCCH A Note: Available on DXM units with an R19 scanning receiver. Band Channel Strongest DCCH over time # Chan RSSI M99 46 50 6 strongest 1p 2 -50 -40 DCCH’s 2p 3 -55 -50 3p 4 -63 -60 -70 3 2 4p 5 -78 -80 5p 6 -85 -90 6p 7 -90 dBm AMPS DCCH A 1 3 5 4:51:10 This screen displays the strongest 6 cellular digital control channels. The user can define up to 165 digital control channels for each cellular band A & B by editing the channel set file.
  • 35. 34 ZK Celltest, Inc. Cellular DCCH B Same as Cellular DCCH A with DCCH B channels. PCS DCCH A Note: Requires an R19 scanning receiver. # Chan RSSI M99 46 50 1p 2 -50 -40 2p 3 -55 -50 3p 4 -63 -60 -70 3 2 4p 5 -78 -80 5p 6 -85 -90 6p 7 -90 dBm PCS DCCH A 1 3 5 4:51:10 This screen is the same as the AMPS DCCH A & B screens except it applies to PCS DCCH channels. The user can load up to 165 PCS DCCH channels for each PCS band A through F. PCS DCCH B through F Note: Requires an R19 scanning receiver. Same as PCS DCCH A. One screen is available for each band within the PCS hyperband. The user can turn scanning on and off for each band within the PCS hyperband. SAM-ALL Playback The SAM-ALL Playback function provides three options for sequential replaying of the data contained in log memory. In SAM-ALL Playback mode, data is presented in the same graphical format as is found in SAM- ALL mode; the mode of operation in which the data was collected. Playback is not available for Select Channel mode or Monitor mode. Note: Data displayed during playback is taken from the log memory. If the top two control channels were logged then only these control channels will be displayed during playback. The same is true for voice channel sets.
  • 36. DXM ProductOverview 35 Even though some of the data displays may not have been selected for viewing while collecting the data file, they can be turned on in Playback mode. This is because the data is saved whether or not you choose to view certain screens during real time analysis. Upon the selection of SAM-ALL Playback from the Main Menu, the fol- lowing screen is displayed: PLAYBACK Start at Time Stamp . . . Start at Marker . . . Start at Beginning Playback of recorded data can be started from the beginning of log memory (i.e., the oldest log), at a specific time within the range of time covered by log memory or at a specific marker placed in log memory by the user dur- ing data collection. The ENTER key can be pressed to pause and resume playback. Start at Beginning If the option to start at the beginning of log memory is chosen, playback will commence immediately at the earliest point in log memory. Start at Time Stamp. . . Playback will commence at the time stamp in log memory on the date and time entered. If no time stamp is found to be earlier than the date and time entered by the user, playback will commence at the next time stamp imme- diately following the date and time entered.
  • 37. 36 ZK Celltest, Inc. The factory default playback start time is set to 30 seconds prior to the last time recorded. This allows the user to quickly replay the last 30 seconds of information without having to manually adjust the start time. If the user wants to change the default playback start time to one minute they would change the playback start time manually to one minute prior to the end of the file. The next time this feature is used it will default to one minute prior to the end if the file. Start Playback at Marker Playback will commence at the time stamp in log memory immediately preceding the marker number entered. If no time stamp is found, playback will commence at the next time stamp immediately following the marker number entered. Select Channel Data Screens Hyperband indicator M99 # Chan RSSI SID DCC SAT -40 1 c 325 94 31 0 2 c 333 87 31 0 -50 3 c 341 90 31 1 -60 4 p 996 69 -70 5 p 708 79 -80 6 p 715 86 -90 13 5 dBm Select Channel 12:35:35 In SELECT CHANNEL mode, all of the user designated channels are scanned and their RSSIs are measured continuously, displayed on screen, and logged. If the user has the GPS option, GPS data will also be logged. For analog cellular voice channels, SAT is reported and for analog/IS54 control channels, DCC and SID are reported. If the unit is equipped with both the R8 and R19 scanning receivers then the user can scan channels from both the cellular and PCS hyperbands.
  • 38. DXM ProductOverview 37 Audio Quality Measurements With the audio quality option you can measure uplink/downlink audio quality on multiple phones/systems simultaneously with true MOS meas- urements. Speech clips are sent in both directions and measured and recorded. Uplink MOS data is stored in the RMS Server and downlink- MOS data is stored in the DXM. The DXM data can be sent via ftp to the RMS Server where it is merged with the uplink data. Using the RMS Server software the user can create maps and reports of the data along with the other engineering data collected by the DXM. (See RMS Product Description for data analysis features.) DXM DXM SAM BREAK P ub lic ENTER Au d io Te lep hon e T1/E1 Lines Ne twork DXM SAM FTP Da ta an d Aud io FTP Da ta LAN Wire les s Ethe rne t Ce llu lar Ne twork Meas ure Up link Au d io Qu a lity Up lin k S end Sp eec h Clip Re ce ive FTP Da ta S end FTP Da ta S end Sp eec h Clip Down lin k Meas ure Do wn link Au d io Qua lity S end FTP Da ta Re ce ive FTP Da ta The user sets up autodialling with the DXM. Calls can be generated in both uplink and downlink directions. If the DXM has the wireless modem option the downlink data can be transmitted to the RMS Server and merged with the uplink data. Export Log Memory A large amount of log data can be stored to the Compact FLASH memory card in the DXM units. With a 300MB card you can expect to log 100 hours of data. With the wireless modem option the log data can be automatically trans- mitted to a standard FTP server or to the ZK RMS Server.
  • 39. 38 ZK Celltest, Inc. Analysis of the data can be done by MapInfo by converting it with ZK Celltest’s CellMap software or with Excel or with ZK’s RMS Server. Conclusion The DXM is a full featured and reliable product. The hardware and soft- ware has been field proven by cellular engineers for more than five years. ZK Celltest has been supplying field measurement equipment since 1985. We are dedicated to supplying the highest quality products and service pos- sible. For more information please contact us at any of the following: ZK Celltest, Inc. 3180 De La Cruz Blvd. Suite 201 Santa Clara, CA 95054 Tel: 408-986-8080 Toll Free: 800-CELLTEST Fax: 408-986-8178 email: sales@zk.com Web Site: www.zk.com

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