Using The Tam; Diagnostic Functions - HP 8560A Service Manual

Using the TAM

When attached to the spectrum analyzer's rear panel, the HP 85629B Test and Adjustment
Module (TAM) p rovides diagnostic functions for supporting the HP 8560A. Because the TAM
is connected directly to the analyzer's internal data and address bus, it controls the analyzer's
hardware directly through firmware control. It would be impossible to control the hardware to
the same extent either from the analyzer's front panel or over the HP-IB.
Revision C (date code 890704), or later, of the HP 85629B TAM firmware supports the
n
HP 8560A Spectrum Analyzer.
The TAM measures voltages at key points in the circuitry and flags a failure whenever the
voltage falls outside the limits. The TAM locates the failure to a small functional area which
can be examined manually. Remember the following when using the TAM:
Be sure the spectrum analyzer's power is turned off when installing or removing the TAM.
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l Use the HELP
n Pressing (MODULE) will return you to the TAM's main menu.
The TAM acts as the active controller on the HP-IB bus. No other active controller should
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be connected to the bus.

Diagnostic Functions

The TAM provides the four diagnostic functions listed below. (Additional menu selections
support the TAM itself.) Refer to the indicated page for a description of each function.
Diagnostic
1. Automatic Fault Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
2. Manual Probe Troubleshooting
3. Cal Oscillator Troubleshooting Mode
6-10 General Troubleshooting
(requires cover removal) . . . . . . . . . . . . . . . . . .
(requires cover removal) . . . . . . . . . . . . .
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6-13
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