TEST AND MEASUREMENT
Issue 1 Section 6 MCUK000601C8
Revision 0 – 44 – Service Manual
Figure 6.18: Power level selection 3
13. Enter the value calculated in step9 into the data field and then press ENTER.
14. Press ESC.
15. Re-measure the peak power.
16. Repeat steps5 to 14 for the remaining power levels, in the following order:
PL6, PL9, and PL19.
Power levels between PL9 and PL6.
Power levels between PL14 and PL9.
Power levels between PL19 and PL14.
17. Calibrate PL15 (limits ±0.2dB).
18. After calibrating at channel62, the carrier power must be measured and calibrated at LOW and HIGH channels as shown
in the table below.
19. Repeat steps2 to 14 for the GSM1800 settings in the following order:
PL10 (limits ±0.5dB).
PL1, PL5, and PL15.
Power levels between PL1 and PL4.
Power levels between PL15 and PL10.
Power level PL0 (limits ±0.2dB).
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 GD92 into Test Set mode in the service channel box.
2. Connect the telephone to the GSM Test Set and apply a carrier frequency of 68kHz (for channel60 = 947.00MHz) at an
input level of -90dBm.
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 45dB. Press ENTER.
5. Highlight the RSSI dBm <> field and press ENTER
Channel GSM900 GSM1800
Low 1 512
Mid 62 698
High 124 885
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