Table 7.5-2. Rf Block Diagram Probe/Test Points - Motorola XTS 2500 Service Manual

Troubleshooting Waveforms: RF Test Points
PP/TP Name
1 Antenna Input
2 TX Signal at Harmonic Filter Input
3 Coupler RF Out
4 TX Signal at PA
5 Coupler RF Feedback to PCIC
6 PCIC Control Voltage
7 TX LO
8 Higher Level Voltage Multiplier
9 Superfilter Output
10 TRB
11 Prescalar Input to FracN Synthesizer
12 Reference Crystal Output
13 Mod In
14 1st LO Control Voltage
15 VCO Output
16 VCO RX LO
17 Frequency Out (16.8 MHz)
18 RX RF Input at Antenna Switch
19 Antenna Switch Bias
20 Preselector Tuning Voltage
21 RX RF Input after Antenna Switch
22 Analog 5V
23 Preselector 1 Output
24 Low-Noise Amplifier Output
25 Preselector 2 Output
26 Mixer Out (IF)
27 Crystal Filter Out
28 Abacus Analog 3V
29 2nd LO Control Voltage
30 2nd LO VCO Buffer Output
31 Analog 5V
32 Abacus Digital 3V
33 SPI Data
34 SPI CLK
35 Universal Chip Select
6816985H01-F

Table 7.5-2. RF Block Diagram Probe/Test Points

Location
J101, pin 5
C105
U103, pin 1
Q101, pin 2
TP102
TP101
Tx_inj
C203
C240
R262
C236
R294, C289
TP203
TP202
*
C261
C293
FL1, pin 1
U103, pin 1
FL1, pin 3; FL2, pin 3
FL1, pin 1
U500, pin 5
FL1, pin 2
FL2, pin 1
FL2, pin 2
L10
C413
U501, pin 5
U401, pin 38
C407
U500, pin 5
U502, pin 5
R802
R803
U102, pin 29
7.5-3
Under RF
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Shield?
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Yes. 7.5-7
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Yes. 7.5-45
February 14, 2012