Source Attenuator Switch Protection

The programmable step attenuator of the source can be switched between port 1 and port 2 when the test port power is uncoupled, or between channel 1 and channel 2 when the channel power is uncoupled. To avoid premature wear of the attenuator, measurement configurations requiring continuous switching between different power ranges are not allowed.

For example, channels 1 and 2 of the analyzer are decoupled, power levels in two different ranges are selected for each channel, and dual channel display is engaged. To prevent continuous switching between the two power ranges, the analyzer automatically engages the test set hold mode after measuring both channels once. The active channel continues to be updated each sweep while the inactive channel is placed in the hold mode. (The status annotation tsH appears on the left side of the display.) If averaging is on, the test

set hold mode does not engage until

the specified number of sweeps is completed. The

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Allowing Repetitive Switching of the Attenuator

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measurements which demand repetitive switching of the step attenuator. Use these softkeys with caution; repetitive switching can cause premature wearing of the attenuator.

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H imE&3HES TGE@&@ (see “Trigger Menu”) causes a specified number of measurements to occur before activating the test set hold mode.

6-20 Application and Operation Concepts

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HP 8753E manual Source Attenuator Switch Protection, Allowing Repetitive Switching of the Attenuator, Feature