Agilent Technologies 8564EC Service Manual page 398

Figure 11-2 Test Connector Pin Locations
Table 11-1 Troubleshooting Suspected Faulty Circuits
Suspected Circuit
YTO loop
1st LO
1st LO pretune frequency and amplitude
Fractional N oscillator
3rd LO drive
10 MHz signal at other input to reference
PLL
phase/frequency detector
Sampling oscillator tune voltage
A14 frequency control assembly
A14J301 10 MHz REF input
A15 RF assembly
Current source A14U307
Chapter 11
Synthesizer Section
Test Connector Locations
Procedure to Perform
Confirming a Faulty Synthesizer Section
(steps 12-33)
Confirming a Faulty Synthesizer Section
(steps 9-11)
Unlocked YTO PLL (steps 9-12)
Unlocked YTO PLL (steps 13-17)
Third LO Driver Amplifier (100 MHz
VCXO) (steps 1-6)
Unlocked Reference PLL (steps 12 and 13)
Confirming a Faulty Synthesizer Section
(steps 1-4)
Confirming a Faulty Synthesizer Section
(steps 12-18)
Confirming a Faulty Synthesizer Section
(steps 5-8)
Confirming a Faulty Synthesizer Section
(steps 18-25)
1st LO Span Problems (All Spans)
14-21)
(steps
525