HP 8560A Service Manual

14. External Mixer Bias Adjustment
14. External Mixer Bias Adjustment
Assembly Adjusted
Al5 RF Assembly
Related Performance Test
There is no related performance test for this adjustment procedure.
Description
A voltmeter is connected to the HP 8560A IF INPUT with the external mixer bias set to off.
The bias is adjusted for a 0 Vdc output.
Al4
SPECTRUM
ANALYZER
DIGITAL VOLTMETER
FREQUENCY /
^ ^ - - ^
ADAPTER
Al5 RF
kRD
PROP
SK1 16
Figure 2-17. External Mixer Bias Adjustment Setup
Equipment
DVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A
Adapters
Type BNC (f) to SMA (m)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1200
Type BNC (f) to dual banana plug
. . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1251-2816
Cables
BNC,122 cm(48in) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A
Procedure
1. Set the HP 8560A (LINE) switch off and disconnect the ac power cord. Remove the analyzer
cover and connect the equipment as illustrated in Figure 2-17. Reconnect the power cord
and set the (LINE) switch on.
2. Set the HP 3456A controls as follows:
FUNCTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DCVOLTS
RANGE...........................................................O.lV
RESOLUTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..lOOmV
Adjustment Procedures 2-55

HP 8560A Specifications

General

Brand	HP
Model	8560A
Category	Measuring Instruments
Language	English