Installation of A PRO inc Multi-Unit Installations

Developers of the CEL-FI® SMART SIGNAL REPEATER
Installation of a PRO

Developers of the
CEL-FI® SMART SIGNAL REPEATER
Lets Install the PRO:
• Specification
• Telstra Bands, Bandwidth & Config
• User Capacity
• Error Codes
• Tech Mode
• Antennas
• The 5 GHz Link
• Installing Multiple Units
• Testing PRO-X
• Support Scenarios
Agenda

Multi-Unit Installations
There will be cases where you are required to install multiple Cel-Fi PRO’s in a building
to:
• Cover a larger area
• Add capacity for a larger number of users
• Add another operator
• Extend the coverage using daisy chaining (max of two system)
The Basics to Remember
• Prevent feedback scenarios where CU feeds NU.
• No more than two NU or CU’s next to each other (must be 1m apart)
• Due to RF fluctuations try to keep CU at 70-90% gain
• Use the PRO-X cable accessory in high 5GHz traffic areas
• Install one system at a time getting it stable before processing to the second
• Use separate external antennas to assist with feedback

Avoid feedback scenarios where CU feeds NU. The system may still work, but the
coverage area will be reduced.

Up to two WU units can be next to each other but they must be separated by 1m. Also
install the each system so the CU is roughly the same distance from the NU’s.

When floors are made of metal or concrete a system will be required on each level.

Multi carrier installations are less likely to result in feedback and are just required to have
the boxes at least 1m apart. They may still however suffer from 5GHz issues.

Lets start with a commercial space. Remember you can’t add multiple CU’s to the one
NU. The units are a married pair so you have to add a complete new system.

Start with installing a single system at one end of the building and test coverage area.
This will form the basis of additional units and how many are required.

Add the second system and try to keep the distances or CU gain between each box
similar to the first install. The signal from the CU’s should ideally overlap.

Place the third system using similar principles as the second. Ensure the gain on the CU is
similar to the other two system.

Installation of the PRO-X Cable Accessory
PRO-X are passive sleaves designed for use with the PRO, enabling the
connection of the network and coverage boxes using a cable.
Use of the PRO-X does not turn off the 5GHz
link and the required separation is still
needed between the NU and CU.
The cable length must not sustain >40dB
of loss @ 5.8GHz.
Over the next few slides we will
demonstrate some test scenarios
with PRO-X to help determine it’s
capabilities.

PRO-X Cable Through Wall Setup
Tests were conducted with different cables in a room where there was no
mobile signal due to solid concrete walls.
The purpose of the test was to check cable type and length requirements
to maximise the coverage bubble.
Cable
Mobile Coverage
Mobile Coverage
Concrete
Wall

Cable Wall Test
Type/
Length
CU
Bars
NU RSSI
(dBm)
CU RSSI
(dBm)
NU TX
(dBm)
CU TX
(dBm)
Distance Metric Coverage Distance
from CU
RG174
2m
1 -70 -70 6 6 -15 R: -21 4m
10m
20m
30m
40m
60m
80m
100m
120m

PRO-X Cable Test Setup
Tests were conducted with LMR240 cable in an area where there was no
mobile signal at ground level.
Mobile signal was obtained by connecting a Yagi antenna to the NU.
Cable
Mobile Coverage
Mobile Coverage

LMR240 Cable Test
Length CU
Bars
NU RSSI
(dBm)
CU RSSI
(dBm)
NU TX
(dBm)
CU TX
(dBm)
from CU
5m 1 -70 -70 6 6 -15 R: -21 4m
10m
20m
30m
40m
60m
80m
100m
120m
140m
160m
180m
200m

LMR400 Cable Test
Length CU
Bars
NU RSSI
(dBm)
CU RSSI
(dBm)
NU TX
(dBm)
CU TX
(dBm)
from CU
5m 1 -70 -70 6 6 -15 R: -21 4m
10m
20m
30m
40m
60m
80m
100m
120m
140m
160m
180m
200m

PRO-X Wireless Test Setup
Instead of using cable to join the PRO-X sleaves, tests were conducted
using two 5GHz 20dBi directional antennas. The antennas where
connected to the sleaves via 75cm RG58 patch cables.
The antenna link is entirely passive and does not require power.
Passive
Wireless Link
Mobile Coverage
Mobile Coverage

5GHz Directional 20dBi Panel
Length CU
Bars
NU RSSI
(dBm)
CU RSSI
(dBm)
NU TX
(dBm)
CU TX
(dBm)
from CU
5m 1 -70 -70 6 6 -15 R: -21 4m
10m
20m
30m
40m
60m
80m
100m
120m
140m
160m
180m
200m

Customer Support Scenarios
Issue
No 4G Signal or No 4G Improvement on Handset
Information to Obtain
How many bars on NU and CU
Check tech mode to see what bands Cel-Fi is boosting
Check Handset customer is using to see what bands it supports
Check signal strength on phone in test field mode with Cel-Fi turned on and off.
With phone in field test mode check the channel the phone is using and also check in PRO tech mode.
If using an external antenna what bands does it support
Does phone connect on 4G on the outside of the building
Possible Solutions
Customer’s handset does not support 4G 700
- If the customer is not using an external antenna get the customer to enable the external antenna
option for the 700 band using the WAVE App. This will decrease the signal by 40dB.
- If the customer is using an external antenna, changing the 700 band to internal antenna and the 1800
band to external may assist.
- Using an 1800 tuned antenna could also assist.
- Customer’s signal is too low, recommend an external antenna

Issue
No 3G Signal, No 3G Improvement on Handset or Cant Make a Call
Check Handset customer is using to see what bands it supports
Check signal strength on phone in test field mode with Cel-Fi turned on and off.
With phone in field test mode check the channel the phone is using and also check in PRO tech mode.
Does phone connect on 3G on the outside of the building
Possible Solutions
A 3G signal is not present at the location
- Use an external antenna tuned for 850Mhz
Customer is Using an iPhone
- Advise customer of how iPhone’s bars measure signal differently and ask if they get better range or less
dropped calls now.
Customer using a GSM Phone or Does Not Support 850 band
- Advise customer to upgrade phone

Issue
Data Speeds Slower Through PRO
Check modem customer is using to see what bands it supports
Is modem connecting on 3G or 4G through Cel-Fi
Check signal strength on modem with Cel-Fi turned on and off and what bands it uses.
Possible Solutions
If signal strength is low on the band the modem is using, connect an external antenna to the PRO
Use a dedicated external antenna or MIMO antenna on 4G for the modem
Ensure the modem is close to the CU

Developers of the
CEL-FI® SMART SIGNAL REPEATER
Further Information
www.powertec.com.au
www.cel-fi.com.au
http://www.facebook.com/Celfirepeater
This presentation can be downloaded at
www.cel-fi.com.au/presentations

Installation of A PRO inc Multi-Unit Installations

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