Agilent Technologies 8360 B Series Service Manual page 594

Change A
djustments
he following adjustments apply to your instrument. Use these adjustments in addition to the
ones described in the \Adjustments" chapter of this manual.
Fractional-N VCO Adjustment
Description and Procedure
No test equipment is required for this procedure.
his adjustment sets the VCO tuning voltage to
1. Leaving all cables connected, place the A4 fractional-N assembly on an analog extender
board.
2. urn the synthesizer on and press
hour.
3. Select the A4 VCO tune adjustment. On the synthesizer, press:
Adjust Menu AssyAdj Menu A4 VCO Tune
SERVICE
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4. Using a non-metallic tool, adjust A4L1 (see Figure 12-4) to center the needle on the
display.
5. urn the synthesizer to standby, and reinstall the A4 assembly.
Related Performance Tests
Self-tests
12-4 Instrument History
0
6.0 V for a VCO output of 60 MHz.
. Let the instrument warm up for at least one
PRESET
5
Figure 12-4. A4L1 Location
Agilent 8360
ervice