Key Rf Performance Tests In Call Mode; Tx Tests; Rx Tests - Nokia RM-11 Series Troubleshooting Manual

CC Technical Documentation

Key RF Performance Tests in Call Mode

Tx Tests

Max Limiting Power
Set the sector power to -95dBm or lower and set the reverse power control bits in the
8960 to always up. This is the maximum limiting power that the mobile terminal can
provide. Check limiting power vs. channels and see whether they are accurate to the
limits. (Be sure to account for cable loss.)
Waveform Quality (RHO)
This can be measured on the 8960 call box. Always measure at maximum power. The
value should be greater than 0.97. The frequency error should be within +/-150Hz.
Spurious Emissions (ACPR)
ACPR can be measured on the 8960 call box. Always measure at maximum power. Limits
for +/-885kHz and 1.98MHz are lower than at least -42dBc and -54dBc.

Rx Tests

Rx Sensitivity
Measure this on the 8960 call box. Always measure at max power. Rx sensitivity is
defined as the minimum sector power for 0.5% FER. Usually the result is better than
-107dBm. (Be sure to account for cable loss.)
Receive Signal Strength Indicator (RSSI)
When in a call, you can verify the receiver received level by using the RF AGC component.
The RSSI reading tracks with the call box sector power reading within 2dB. Vary the
sector power from -25dBm to -104dBm for accuracy. If the RSSI reading is off (e.g.,
20dB), start Local Mode troubleshooting.
LNA Switching (High/Low Gain State)
When in a call, you can verify at what point the LNA is turned on (High Gain State) by
using the RF AGC component. The indicator for the LNA turns red when it is turned on.
Usually, the LNA turns on between -93dBm and -95dBm. If the LNA does not turn off at
all on the RF AGC Status dialog box while in a call, you have bad sensitivity.
Issue 2 09/2005
©2005 Nokia Corporation
Troubleshooting - RF
Confidential
RM-11
Page 25