Panasonic EB-GD30 Service Manual page 48

TEST AND MEASUREMENT
Power levels between PL15 and PL10.
Power level PL0 (limits ±0.2dB).
6.5.2 RSSI
This procedure describes the calibration of RSSI on the compensation channel (Mch = Ch 67). This process must be carried
out for LOW/BOTTOM CHANNEL and HIGH/TOP CHANNEL. The following channel settings are used in this procedure:
1. Set up the test equipment as described in Section 6.3 and switch the unit into test mode as described.
2. Apply a carrier frequency of +68KHz to the UUT (for Ch 67 = 948.400 MHz) at an input level of -90 dBm.
3. At the Channel box highlight the CHANGE CH <67> field and press ENTER.
4. Highlight the SET AGC 1 field and change the set value to 45 dB and press ENTER.
5. Highlight the RSSI dBm <> field and press ENTER.
6. If the measured value 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.
Issue 1
Revision 0
Channel GSM900
Low/Bottom 10
Mid 62
High/Top 105
Figure 6.20: RSSI dB field
Section 6
– 42 –
GSM1800
544
699
885
MCUK991001C8
Service Manual