TXPOWER reflects the transmitter power level of the mobile phone, which depends on the distance from the base station - closer phones transmit at lower power levels. RXPOWER indicates the power level of the received signal at the mobile phone, reflecting signal coverage but not necessarily quality. EcIo measures the strength of the desired pilot signal relative to the total received signal, helping evaluate signal quality accounting for interference levels. TXADJ indicates the balance between uplink and downlink - a higher value means the forward link is better than the reverse link. FER measures call quality on the forward link, and along with EcIo can identify problems like interference from adjacent cells. Together these parameters provide insight into coverage strength, signal quality, and link balances

1. 1. TXPOWER
TXPOWER is the phone’s transmitter power. We know that power control is guaranteed call
quality and address the CDMA community interference tolerance and one of the key means of
mobile phone from the base station near, uplink quality good, the mobile phone transmitting
power is smaller, because at the base station is able to guarantee the reception of the signal to
launch mobile phone and fer also small and mobile phones transmitting power is smaller to other
mobile phones in the community is also a small interference. So mobile phones transmit power
level, reflecting the handset’s current uplink loss and interference. Uplink loss of large, or there is
serious interference with the phone’s transmitter power will be greatly missed mobile phone
transmitting power is smaller. Roadtest, in normal circumstances, the more closer to the base
station or Repeater, the mobile phone transmitting power is reduced, away from the base station
and Repeater, the mobile phone transmitting power increases. If the base station and Repeater
nearby mobile phone transmitting power, obviously it is not normal. Perhaps there is interference,
the uplink can be a base station and Repeater itself. Such as community antenna wrong receive
carrier frequency amplifier circuit problems, etc. If the Repeater nearby, cell phone transmitter
power, it may be a Repeater malfunctions, uplink gain set too small, and so on. Above you can
see, the road of TXPOWER level reflects the base station coverage area of reverse link quality
and uplink interference levels.
2. RXPOWER
RXPOWER is a mobile phone to receive power. In CDMA, according to my personal
understanding, there are three parameters is very close by, you can almost equivalent to the use
of parameters. Namely RXPOWER, RSSI, Io. RXPOWER is amobile phone to receive power, Io
is mobile phones currently receives all signal strength, RSSI is receives downlink band of total
power, as currently I have access to information, the title explains, but understanding is very
similar, is the phonereceives a total of signal strength. RXPOWER and reflects the current signal
receiving phone, RXPOWER small area, the weak positive fall within the coverage area,
RXPOWER places belong to the covered area. But the high places, RXPOWER and does not
necessarily signal quality is good, because there may be no signal, leading to frequency, or too
many strong pilot, pilot frequency pollution. Therefore, the analysis of RXPOWER to EcIo to
analysis. Above you can see, RXPOWER and simply reflects the drive test signal coverage area,
rather than the quality of the signal coverage.
3. EcIo
EcIo reflects the handset in the current received pilot signal level. This is an integrated pilot
signal. Why, because mobile phones are a multi-channel soft switching, which translates into
mobile phones often lies in more than one pilot overlapping coverage area, the level of the phone,
EcIo reflects the phone at this point that a multi-channel pilot signal level of the overall coverage.
We know that the Ec is a mobile phone available pilot signal strength, and Io is the mobile phone
receives all the strength of the signal. Therefore, EcIo reflects the available signal strength in
occupies all signals. The higher the value, the greater the proportion of a useful signal, on the
other hand also reversed. At some point EcIo big, there are two possibilities. First, the Ec is very
large, dominant level here, Ec, Io is very small, that is to say here is from another base station’s
messy little pilot signal, EcIo also larger. In the latter case is weak, because the Ec small, Io is
also small, so small, so RSSI also there may be dropped. At some point EcIo also small, there
are two possible, first, the Ec is also small small RSSI, this is the weak coverage area. The Ec is
not small, RSSI, this illustrates the Io is the overall intensity of the signal is not bad. This situation
is often a BSC switch data configuration, no nearby strong pilot signal into the adjacent
community table, so the phone doesn’t recognize the strong pilot signal in the vicinity as a
jamming signal processing. On the road, in the case of a typical phenomenon is the phone in a
move to maintain certain RSSI, EcIo level, rapid rise to FER and eventually dropped.
4. TXADJ
TXADJ reflects the up and down-link a balance. Note that this value is calculated from the

2. measurement, instead. 800M CDMA system is Tx_adjust = 73dB + Tx_power + Rx_power,
1900M CDMA is Tx_adjust = 76dB + Tx_power + Rx_power.
TXADJ reflects the current location of the mobile uplink and downlink of a more mass. We know
that under normal circumstances, the cell phone away from the base station close to the phone’s
transmitter power will decrease, and
received power will become larger and far away from the cell phone, mobile phone base station
transmitter power will increase while receiving power gets smaller. Normally, the transmitter
power and receiver power plus a constant fixed values, the result should be a small interval (for
example,-10 to + 10). If TXADJ great, it means that the phone’s transmitter power, receive the
power, then it is obvious that mobile current downlink of good quality (receiving power), and the
poor quality of the uplink (transmitter power), this time forward link is better than a reverse link.
On the contrary, TXADJ is very small, explains this reverse link well to the forward link. We know
that the base station coverage depends on the reverse link loss level. Therefore, in General, we
require the following TXADJ in 0. But greater than 10, the reverse link forward link than are poor,
the situation is not ideal. For TXADJ, nor can they be said to be as small as possible. But in the
actual drive test, we generally encounter, often TXADJ too high, forward link, reverse link.
5. FER
FER is a forward-fer. Forward fer with EcIo also is a comprehensive quality of forward link.
Because when the phone is in the multi-channel soft switching, fer actually multi-channel forward
an integrated signal quality. FER, description of themobile phone of the forward link better,
received signal is good, this time EcIo also should be better. The larger the Description cell phone
FER the received signal strength is poor, EcIo should also at this time. FER is large, it may also
be due to a neighboring community switch parameter configuration error. If you switch between
adjacent community with leakage, single and mobile to mobile, adjacent to the pilot was not
recognized, and the pilot does not recognize, it will become interference signal, resulting in
increased FER. In reality, often manifested in mobile, mobile phones, FER a rapid rise in sharp
decline, EcIo, and finally dropped. Above that is closely followed by EcIo FER. FER reflects the
call quality is good or bad, reflects the RoadTest regional coverage quality level, rather than the
signal coverage strength level. In some areas although belonging to the weak signal coverage
area, but relatively clean (messy signals, noise), as well as be good FER.
Note the above parameters, EcIo, RXPOWER is the phone in standby or call have parameters,
TXPOWER, TXADJ, FER is only a phone call and from the only parameter. The above five
parameters, together, to analysis of drive test region to cover the intensity level, the former to
override the quality level, as well as the reverse link loss level, and so on, is the analysis of drive
test is the most important parameters. In-depth understanding of the five parameters, combined
with the overall situation for drive testing specific analysis, is engaged in network optimization
staff in one of the basic conditions.