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Table.18.1. and Table.18.2. show the limits of the timing for all power levels in GSM 900 and
GSM 1800.
GSM900
Parameter
Power at
Power at
Power at
Power at
Power at
Power at
Power at 542.8 µs
Power at 552.8 µs
Power at 560.8 µs
GSM1800
Parameter
Power at
Power at
Power at
Power at 542.8 µs
Power at 552.8 µs
Power at 560.8 µs
18.2 How to find the fault
Usually the fault is due to an incorrect power calibration.
The intermediate power level (see separate chapter for further information) is also measured at
the power calibration, it has a direct effect on the raise and fall slope of the burst.
If the fault is electrical it is usually due to N450 or N401, but it can also be due to C403 or
C404.
4/00021-3/FEA 209 544/18 B
Power level
-18 µs
5 - 19
-10 µs
5 - 15
-10 µs
-10 µs
-10 µs
0 µs
Table.18.1
Power level
-18 µs
0 - 15
-10 µs
0 - 15
0 µs
0 - 15
0 - 15
0 - 15
0 - 15
Table.18.2
Trouble Shooting Guide, Advanced
Relative
Absolute
-30 dBc
-17 dBm
-6 dBc
-4 dBc
-2 dBc
-1 dBc
+1 dBc
+1 dBc
-6 dBc
-30 dBc
Max
Min.
-30 dBc
-6 dBc
+1 dBc
-1 dBc
+1 dBc
-1 dBc
-6 dBc
-30 dBc
Relative
-1 dBc
-1 dBc
79(121)
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