Hi Peter,

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I did a test on my 8753ES (integrated Sparameter):

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I made a small PCB with just an LC resonator.

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I put the VNA in single sweep mode, the marker in width mode.

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In a loop to take 6 readings.

In a 1kHz bandwidth, I get 6 peak in 1.6sec.

In a 3kHz bandwidth, I get 6 peak in 0.8sec.

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The loop contains the following commands:

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*OPC?;SING

I'm waiting for the sweep to be completed.

After I send the following command: OUTPMWID to read the data.

This command searches for the peak and returns the data.

The data returned is bw, frequency and Q factor.

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I don't know the resBW you used in your test, but you have 2 results here for 1kHz and 3kHz bandwidth for comparison.

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I can redo the test, if you specify the bandwidth, to do a best comparison.

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-Yves

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Will an HP8753ES with the built in S-parameter test set slow down calculations compared to using an HP8753ES with opt 011 and the Transmission/Reflection test set (HP85044A)?

Our present analyzer is an HP8753ES - 011 --- It does not have a?built-in or attached S parameter test set - it only uses a Transmission/Reflection test set ( HP 85044A).

We measure the properties of resonances in our cavity, up to 3 GHz,in?the "thru" mode ( i.e. transmission mode) - We need the peak frequency?and the coupled Q of each resonance.
Our unit displays them on the screen when we select the correct display?mode.

More importantly, we use a Labview-based program and GPIB commands to?interrogate the Network Analyzer and have the pairs of peak frequency?and Q numbers for each resonance sent to our control computer.?In doing this, speed is very important to us. Our present system can?measure the f and Q of 6 peaks in 3 seconds.

I have a few question relating to what performance we might expect if we?used an HP8753ES with a built-in S-parameter test set:

• Can the peak frequency and Q be accessed via GPIB commands in this S?parameter test-set configuration ?? We have no interest in the S?parameters as such - just the peak frequency and Q .
• If this can be done, will the GPIB commands be different from the ones?we use now with our system ? We don't want to modify the software or have two versions to deal with.
• If all this is a go - will the speed of acquisition be decreased compared?with our present system ?? Will the S-parameter "system" slow things?down in any way ?
  Note that the same system using an HP8753C is considerably slower than using an HP8753B which is slower than the HP8753ES.?

Thanks for suggestions or help !