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S:\Hp8960\E1960A GSM Mobile Test Application\A.04 Release\Reference_Manual\Chapters\ts_txp.fm
Transmit Power Troubleshooting
Transmit Power Troubleshooting
June 29, 1999
Possible Setup Issues
During remote operation of the Transmit Power measurement the user should configure the trigger arm to
single, see
.
Failure to set trigger arm to single may result in the measurement never giving a result. When trigger arm is
continuous the measurement rearms itself and starts another measurement cycle, during remote operation
the fetch query may not be synchronized to the measurement cycle, see
“Measurement States” on page 150
.
If trigger source immediate is used for burst modulated signals the results returned will be unreliable. Burst
modulated signals should be measured with Trigger Source set to RF Rise or Auto.
The Transmit Power Average, Transmit Power Maximum, Transmit Power Minimum results are shifted in
proportion to the value of Amplitude Offset that a user may set. The following table shows the measurements
that are affected and how amplitude offset affects them. For more information about amplitude offset
commands, see
“Measurement Related Configuration” on page 563
.
Interpreting Integrity Indicator values
See
“Integrity Indicator” on page 125
.
If over range (5) is returned; the input power has exceeded the test set’s internal sampler maximum value
during some part of the sampling or the input power has exceeded the calibrated range of the test set’s power
detector for the RF Range setting. RF Range is automatically set based on the input power setting. Input
power is a combination of amplitude offset and expected power settings. See
“Receiver example” on page 564
.
If the signal has both over range and under range conditions only the over range (5) will be indicated.
If under range (6) is returned; the Transmit Power result is more than 10 dB below the expected input power
level. Under range is also indicated if, the input power is more than 2 dB below the calibrated range of the test
set’s power detector for the RF Range setting. RF Range is automatically set based on the input power setting.
Input power is a combination of amplitude offset and expected power settings. See
.
Table 9. Measurements affected by amplitude offset
Amplitude Offset Command
Transmit Power (dBm)
Cell Power
Setting
(dBm)
Average Maximum Minimum
OUTPUT 714;”SYSTEM:CORRECTION:SGAIN -3”
!Offset for 3 dB of loss in the network.
6.86
6.86
6.85
-88
OUTPUT 714;”SYSTEM:CORRECTION:SGAIN 3”
!Offset for 3 dB of gain in the network.
6.86
6.86
6.86
-82
OUTPUT 714;”SYSTEM:CORRECTION:SGAIN 0”
!Zero dB of offset.
6.86
6.87
6.85
-85
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