Cavity Oscillator Frequency Correction Constants (Test 54) - Agilent Technologies 8753ES Option 011 Service Manual

Cavity Oscillator Frequency Correction Constants (Test 54)

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.
Analyzer warmup time: 30 minutes.
NOTE You should perform this procedure with the recommended filter, or a filter
with at least 50 dB of rejection at 2.9 GHz, and a passband which includes
800 MHz. The filter makes spur identification substantially faster and more
reliable.
With the filter, 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 filter, you need to distinguish the target spur between four or five spurs, each
of which may be 0.002 to 0.010 dB (invisible to 2 divisions) above or below the trace noise.
Perform the first five steps of the procedure at least once for familiarization before trying
to select the target spur (especially if you are not using a filter).
Required Equipment and Tools
Description
Low pass filter (used with the adapters below)
Adapter type-N (m) to SMA (f)
Adapter type-N (f) to SMA (m)
Power splitter
Attenuator 20 dB
RF cable set
Antistatic wrist strap
Antistatic wrist strap cord
Static-control table mat and ground wire
Chapter 3
Cavity Oscillator Frequency Correction Constants (Test 54)
HP/Agilent Part or Model Number
9135-0198
1250-1250
1250-1562
1667A Option 001
8491A Option 020
11851B
9300-1367
9300-0980
9300-0797
Adjustments and Correction Constants
3-25