Cavity Oscillator Frequency Correction Constants (Test 54) - HP 8753D Option 011 Service Manual

Cavity Oscillator Frequency Correction Constants (Test 54)

Required Equipment and Tools
Low pass lter
ower splitter
Attenuator 20 dB
RF cable set
Antistatic wrist strap
Antistatic wrist strap cord
Static-control table mat and earth ground wire
Analyzer warm-up Time:
The nominal frequency of the cavity oscillator is 2.982 GHz, but it varies with temperature.
This procedure determines the precise frequency of the cavity oscillator at a particular
temperature by identifying a known spur.
ote
You should perform this procedure with the recommended lter, or a lter
with at least 50 dB of rejection at 2.9 GHz and a passband which includes
800 MHz. The lter makes spur identi cation substantially faster and more
reliable.
With the lter, you need to distinguish between only two spurs, each of which should be 10
dB to 20 dB (3 to 4 divisions) above the trace noise.
Without the lter, you need to distinguish the target spur between four or ve spurs, each of
which may be 0.002 to 0.010 dB (invisible to 2 divisions) above or below the trace noise.
erform the rst ve steps of the procedure at least once for familiarization before trying to
select the target spur (especially if you are not using a lter).
RAFT
3/21/106 15:11
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0 minutes.
Adjustments and Correction Constants 3-27
H /N 9135-0198
H 11667A Option 001
H 8491A Option 020
H 11851B
H /N 9300-1367
H /N 9300-0980
H /N 9300-0797