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Hi Yves,
I'd have to move a bunch of stuff around to do this properly so I rigged up something with my HP8350 sweeper (set to CW)
and a 10kHz signal applied to the EXT FM input...
I can see "something" at 20us sweep time. Not a full sinusoid but just a piece of it. But there is a trace there.
(the sinusoid is visible at 4ms)
Mark
From: [email protected] <[email protected]> on behalf of Yves Tardif <yves_tardif@...>
Sent: Friday, March 17, 2023 12:53 PM To: [email protected] <[email protected]> Subject: Re: [HP-Agilent-Keysight-equipment] E4407B option AYX Fast Sweep Time Domain ?
Hi Mark, ? I used a 10 kHz to 182 MHz FM signal here. I put myself in zero span, and the sweep time at 4msec. You can see the modulating signal, because I shifted the frequency of the E4407B to do slope demodulation (I don't have the demod FM option). So, we see a sinusoidal signal. At 4msec of sweep time, the signal is visible, but from 3msec to 20 usec nothing is seen. The range of 3ms to 20usec of sweep time is the range that the AYX option normally gives for 401 points. ? I guess you have different behavior with your AYX option. ? Yves De?: [email protected] <[email protected]>
De la part de Mark Bielman ? Yves, ? My unit has this option, apparently no license required. I can set the sweep time to 20us but I am not sure what test you are doing. ? Are you saying that 20us sweep time is NOT displayed on the SA screen? ? Mark ? From:
[email protected] <[email protected]> on behalf of Yves Tardif <yves_tardif@...> ? Hi, ? I was lucky enough to find an E4407B, it was defective but I managed to repair it. Currently, I'm doing performance tests to see if everything is working properly. I am at the stage where I have to test the sweep time. This Spectrum has the AYX Fast sweep time domain option. It is written in the Specifications Guide: ? Basic configuration sweep time for span = 0 Hz => (sweep points-1)/100kHz to 4000 sec or 10us to 4000sec for 2 points, and 4msec to 4000sec for 401 points. ? option AYX Fast Time Domain sweep time for span = 0 Hz => (sweep points-1)/20MHz to 4000 sec or 50ns to 4000sec for 2 points, and 20usec to 4000sec for 401 points. ? The AYX card is detected, and it appears in the HARDWARE or SYSTEM menu. Moreover, when I do the sweep time test, the signals appear on the BNC connectors at the back of the unit and are normal, so this card seems to work properly, but the sweep time is functional with a trace displayed on the screen, up to 4msec for 401 point, as if the AYX option was not installed. However, if I remove the card, for 401 points, the sweep time refuses to go lower than 4ms, with the card, the same test shows a minimum sweep time is 20usec as written in the technical document about this AYX option. ? In the installation manual, it seems that just inserting the card, activates this function, there is nothing else to do...there is really little detail. The card is in slot #3, I tried in slot #4 for the same behavior. ? Anyone have an idea, is the card defective? ? -Yves |
