Martin,

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You wrote: "The microwave module is even worse, at 10GHz its off by 5MHz with no CAL as the other modules have."

The frequency accuracy maybe off by 5MHz, in CW mode, the tolerance is ±20MHz.

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The FREQ CAL potentiometer on the front panel is only used to align a cavity oscillator for down conversion to cover a frequency band starting at 10 MHz.

Your 83545A covers a range of 5.9-12.4GHz, so this FREQ CAL control will be missing.

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The DIP switch can be modified to configure certain parameters.

Here is the list for each switch.

Switch #2 and #3 do not show details, but for the 83540A, switch 2 is at 1, and switch#3 is at 0.

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Hi Yves,

here are my results.

1) HP 83522A set as yours, also about the same parameters on my SA. The trace is similar, but much noisier than yours.

2) Hp 86222B (same frequency range) plugged in with the adaptor. Same settings, peak is a bit sharper and much less noisier. But less stable too, doing significantly more wandering around.

BTW, the DIP-switches were set to 10001010!! Don't know what that belongs to, but once I set it to 00000010 everything was fine. Why is this configuration modifyable at all?

With the wrong setting I could get frequencies up to around 2,8GHz. The attenuator was OK only below 2GHz, above it worked in steps of 10dB (with the relay clicking). With the correct DIP setting it worked fine on all (allowed) frequencies.

cheers
Martin

HP 83522A


HP 86222B