12. 10 MHz Reference Adjustment-TCXO (Option 103)
Procedure
Note
Allow the spectrum analyzer to warm up for at least 30 minutes before
performing this adjustment.
1. Connect the equipment as shown in Figure 2-20. Prop up the Al4 frequency control
assembly.
2. Set the frequency counter controls as follows:
Sample rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Midrange
50 R-l MR switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
0
10 Hz-500 MHz/500 MHz-26.5 GHz switch
. . . . . . . . . . . . . . .10 Hz-500 MHz
3. Press
(mCTRL)
REllR
PANEL.
Verify that the 10 MHz reference is set to 10 MHz INT .
Note
When the 10 MHz reference is set to
10
MHz
EXT, the TCXO is not operating
and warmed up. If the reference is set to
10
MHz
ENT
, set the reference to
10 MHz INT and allow 30 minutes for the TCXO to warm up.
4. Remove dust cap from A15U302, TCXO. The dust cap is toward the rear of the spectrum
analyzer.
5. Adjust 10 MHz ADJ on A15U302 for a frequency counter reading of 300.000000 MHz
f30
Hz.
6. Replace the
dustcap
on A15U302.
2-52 Adjustment Procedures
