Panasonic EB-X70 Service Manual page 49

The output measured at the coupler (U607) output should be ~20 dB below the power amplifier output:
10742-1
Signal level at the RFIN connection of the Automatic Power Controller (APC) IC (U605):
10747-1
PMCD030901C8
Service Manual
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Figure 8.3: GSM 1800 / GSM 1900 Coupler (U607)
Figure 8.4: APC IC (U605)
Section 8
– 47 –
dBm
Coupler O/P, single-ended measurement
1
12
2
-8
-18
-28
-38
Start: 1.709200 GHz
Stop: 1.711200 GHz
dBm
APC I/P, single-ended measurement.
5
-15
-35
-55
-75
-95
FAULT FINDING
1
Start: 1.709200 GHz
Stop: 1.711200 GHz
Issue 1
Revision 0