My bad the 8757 is only a scalar not a vna like the 8410 and 8505. Thought I went astray and had to go look after you mentioned the options. Regards Paul. WB8TSL
On Tue, Jun 3, 2014 at 3:32 PM, Dr. David Kirkby <drkir...@gmail.com> wrote: > On 3 June 2014 19:22, paul swed <paulsw...@gmail.com> wrote: > > Great comment by Dave on the fact that someone > > will give out some of the old options. Now I have to figure out what on > > earth that might actually mean. > > Regards > > Paul > > WB8TSL > > There are a few options for those VNAs. These are basically generic, > but check your manual for more details. > > 1) Option 006, on an 8753B or later, allows the instrument to work to > 6 GHz. It basically lets the receiver tune to 6 GHz, but the internal > source still only goes to 3 GHz. So you need an S-parameter test set > with a doubler to get to 6 GHz. But there is no harm in having the > option, irrespective of whether you have a 6 GHz test set. > > 2) Option 010 is the time domain. It converts the frequency domain > data to the time domain via an inverse FFT. Then you can put a "gate" > around some stuff in the time domain and transform that back to the > frequency domain. > > A nice option to have, and very expensive on new instruments. > > 3) Option 002 allow the instrument to work on harmonics. I'm not sure > how useful that actually is - I think it was mainly for internal use > at HP, and is not of great use, but if you can get the option, you > might as well. > > 4) Old 8720 series instruments had a tuning step of 100 kHz. There is > an option to make that 1 Hz. How the **** HP got away with selling a > VNA where the step size was 100 kHz I will never know, but they did. > > There are other options for the instruments - the most time-nut > related is the high stability oscillator. That is option 1D5 on my > instrument (8720D). I don't know how easy it is to add the hardware to > an 8753 - I suspect it is just one of the standard 10811A or similar > oscillators. If you do that, it would seem sensible to get the > instrument to report it has the option, even though it wont actually > effect the performance. It would affect the resale value, and would > mean Agilent would calibrate it properly if sent it for cal. > > When my 8720D was sent it for calibration, the accuracy of both the > standard and the high stability oscillator was checked. Both were in > spec. I suspect they would not check the high stability one unless the > instrument reported it had that option fitted. > > > BTW, Agilent will still calibrate 8753s, and when I got my 8720D done, > it was not that expensive. I guess it is all relative, but the 8720D > is quite an expensive instrument, and I use it professionally, so it > is worth getting calibrated - unlike 99% of the other stuff I have. > > Dave > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.