HP 8753E Service Manual

Phase Lock Check with PLL DIAG
Refer to “Phase Lock Diagnostic Tools” in “Source Group Troubleshooting
Appendix” at the end of this chapter for an explanation of the error messages
and the diagnostic routines. Follow the steps there to determine in which state
the phase lock is lost.
q If NO IF FOUND is displayed, con&m that the analog bus is functional and
perform the “Source Pretune Correction Constants (Test 48)” as outlined in
Chapter 3, “Adjustments and Correction Constants.”
q If phase lock is lost in the ACQUIRE state, the A11 assembly is faulty
q If phase lock is lost in the TRACK state, troubleshoot source phase lock loop
components other than the A11 assembly.
Phase Lock Check by Signa
l
Examination
lb con&m that the A11 assembly is receiving the signals required for its proper
operation, perform the following steps.
1. Place the A11 assembly on the large extender board.
2. Switch on the analyzer and press Ipreset).
3. Check for the signals listed in ‘Ihble 7-8.
‘Ihble 7-8. All Input Signals
Mnemonic II0
Accesa
FE=
Notes
FMCOIL-
0 AllPl-S,SS
Figure7-27 AidsYOcoILinaettingYIG.PreasLPreset)LMenu)
,._._ i .,., .__
~~~~~~. @ @-J to *serve this s.I.
REP
I AllTPD
FIgwe 7-0, Observe both low band and high band CW frequencies.
Figure 7-10
YOcoIL+
0
AllPl-2,S2
pjgure 7-7 uw .~~~~~.
._....... - _.............. I- .._...
.._._.
YOCOIL-
0 AllPl-1,Sl
F-lgure 7-7
WrIF
I
AllPLIFIN
F’igure 7-26 Check for 1 MHz with tee a All jack (not at cable end) ir
high band.
7-36 Source Troubleshooting

HP 8753E Specifications

General

Brand	HP
Model	8753E
Category	Measuring Instruments
Language	English