HP 8753D Option 011 Service Manual page 273

Node 24 2nd LO
Perform step A12, above, and then press MEAS
MENU .
CW FREQ
5
This node counts the 2nd LO used by the sampler/mixer assemblies to produce the 2nd IF of
4 kHz. As you vary the frequency, the counter reading should change to values very close to
those indicated below:
Node 25 PL Ref (phase lock reference)
Perform step A12, above, and then press MEAS
.
MENU CW FREQ
5
This node counts the reference signal used by the phase comparator circuit on the A11 phase
lock assembly. As you vary the frequency, the counter reading should change as indicated
below:
10-34 Service Key Menus and Error Messages
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ANALOG IN 24
5
Frequency Entered Counter Reading
0.3 to 1 MHz frequency entered +4 kHz
1 to 16 MHz not accurate
16 to 3,000 MHz 996 kHz
ANALOG IN 25
5
Frequency Entered Counter Reading
0.3 to 1 MHz frequency entered
1 to 16 MHz not accurate
16 to 3,000 MHz 1 MHz
x1
COUN ER: ANALOG BUS
5 5
x1 COUN ER: ANALOG BUS
5 5
3/21/106 15:14
RAFT