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7. Make the receiver RF sensitivity measurement.
1. Select the Amplitude field.
2. Enter −100 using the DATA keys and press the
knob.
3. Press the INCR SET key and enter 0.5 dB using
the DATA keys, then press the knob.
4. Press and release the SHIFT key, then the
RECALL (SAVE) key. Enter SINAD using the
letters in the Save: menu, then select Done (at
the top of the Save menu).
4. Slowly turn the knob counterclockwise to adjust
Amplitude until 12 dB SINAD is displayed on
the meter.
If four dashes appear in the TX Freq Error field,
the Amplitude was lowered too quickly and the
call was dropped.
Re-establish the call using the CALL CONTROL
screen. Press the RECALL key and select
SINAD from the Recall: menu.
The Test Set should be ready to measure SINAD
again.
12 dB SINAD will be obtained at a very low signal level to the mobile station, probably below -110 dBm. For
this reason, it is important to turn the knob slowly while watching the SINAD meter for changes.
Receiver Audio Distortion and Hum and Noise (requires audio connections)
Chapter 4, Mobile Station Analog Tests
81
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