M/N Loop, A32, A33, And A32A1 - HP 8340B Manual

5-4. M/N LOOP, A32, A33, and A32A1

Reference
Performance Test: Frequency Range and CW Mode Accuracy
Service Section: Reference
Description
The M/N VCO tuning range is centered and the output level is set and checkedto ensure an adequate
RF output level across the band of the M/N output.
SPECTRUM ANALYZER
Equipment
Spectrum Analyzer
Digital Voltmeter (DVM)
Low-Voltage DC Power Supply
BNC to SMB Snap-On Test Cable
Adapter, SMB Snap-On Male-to-Male
Procedure
1. Position the OUT in the test position as shown in Figure 5-7 with bottom cover removed. On the
OUT's rear panel, disconnect the BNC cable connected between INT and EXT Frequency Stan-
dard connectors, set INT/EXT switch to EXT, then connect a BNC cable from the OUT's EXT
connector to Spectrum Analyzer Frequency Reference (10 MHz) rear-panel connector. Allow one-
half hour warm up time.
HP 8340B/41B
M/N Loops
—
DIGITAL VOLTMETER
Figure 5-7. M/N Loop Adjustment Setup
LOW VOLTAGE
POWER SUPPLY
HP 8566B
HP 3456A
HP 6294A
HP P/N 85680-60093
HP P/N 1250-0069
Adjustments 5-23