Panasonic EB-X70 - Call Service and Timer Management

FAULT FINDING
Issue 1 Section 8 PMCD030901C8
Revision 0 – 46 – Service Manual
8FAULT FINDING
8.1. RF Waveforms
The measurements shown below are by FET probe on non-50 Ω tracks, therefore signal levels are approximate.
Figure 8.1: GSM 1800 / GSM 1900 Filter (FL606)
The PA amplifies signals by ~30 dB.
Figure 8.2: GSM 1800 / GSM 1900 Power Amplifier (U601)
NOTE: When using a FET probe, it should be protected from high power levels via a 70 dB pad.
dBm
0
-10
-20
-30
-40
-50
SMARTi O/P, single-ended measurement
Start: 1.709200 GHz
Stop: 1.711200 GHz
1
dBm
0
-10
-20
-30
-40
-50
H3 Filter O/P, single-ended measurement
Start: 1.709200 GHz Stop: 1.711200 GHz
1
10740-1
dBm
39
29
19
9
-1
-11
PA O/P, single-ended measurement
Start: 1.709200 GHz
Stop: 1.711200 GHz
1
dBm
3
-2
-7
-12
-17
-22
-27
-32
-37
-42
-47
PA I/P, single-ended measurement
Start: 1.709200 GHz
Stop: 1.711200 GHz
1
10741-1
All manuals and user guides at all-guides.com