Panasonic EB-GD93, Service Manual

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TEST AND MEASUREMENT
Issue 1 Section 6 MCUK001002C8
Revision 0 – 46 – Service Manual
6.6.3. RSSI
This procedure describes the calibration of RSSI on the mid-channel. This procedure must also be carried out for low / bottom
channel and high / top channel.
The procedure is as follows:
1. Power the telephone into Test Set mode in the service channel box.
2. Connect the telephone to the GSM Test Set and apply a carrier frequency of 68 kHz (for channel 60 = 947.00 MHz) at an
input level of -90 dBm.
3. At the channel box, highlight CHANGE CH, and, using the left / right cursor keys, select CH <60>. Press ENTER.
4. Highlight the SET AGC1 field and change the set value to 45 dB. Press ENTER.
5. Highlight the RSSI dBm <> field and press ENTER
Figure 6.19: RSSI dB field
6. If the measured power is not -90 ±1, then make the following calculation:
RSSI offset value = [-(90 + MEASURED RSSI VALUE)] x 2
=[ -90 - MEASURED RSSI VALUE] x 2,
for example [-(90 + (95))] x 2
= [-90 - (-95)] x 2
= 10
Record the result.
7. At the channelbox, press F7 to view data.