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Assembly Descriptions
SW1 & SW2 - Input Relay Assemblies
SW1 & SW2 - Input Relay Assemblies
The SW1 and SW2 Relay Switches determine which N9039A RF Input connector
is routed to the N9039A RF Output connector and if a filtered path or the bypass
path is used.
SW1 & SW2 are DC to 26.5 GHz 50 ohm SPDT switches. Both switches are
controlled by internal TTL signals via a 6 pin ribbon cable from the A23
Conducted Input Board Assembly.
Relay Switch SW1 determines if the signal input of the Preselector will be from
the RF Input front panel connector or the Calibration Source Input connector.
Relay Switch SW2 determines if the signal output of the Preselector that is routed
to the RF Output Front Panel connector will be from the bypass path or the filtered
path.
All Relay Switch ports are terminated when open to reduce reflected signals and
crosstalk
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Chapter 3
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Troubleshooting
