Re: [time-nuts] was: Odd-order multi Now: fft analyzer woes

2020-01-23 Thread Gerhard Hoffmann
Yes, that spill-over to neighbor bins is a known thing; when I wrote software for mixed signal wafer testers we sometimes used no windows at all and instead made sure that all frequencies involved were proper submultiples of the sample rate. In my current situation I'm limited to what the

Re: [time-nuts] was: Odd-order multi Now: fft analyzer woes

2020-01-23 Thread jimlux
On 1/23/20 4:20 PM, Magnus Danielson wrote: There is still the minor? problem, that from low to high frequencies, many new decades start with elevated noise, but I correct for the increased noise bandwidth. Maybe discrete spurii are then over-represented? I'm unsure how to handle that. When I

Re: [time-nuts] was: Odd-order multi Now: fft analyzer woes

2020-01-23 Thread Magnus Danielson
Hi Gerhard, On 2020-01-24 00:48, Gerhard Hoffmann wrote: > In the meantime, the LAN connection to the FFT analyzer works again. > Ansi C requires some re-synchronisation when switching the direction > of the data > flow in a TCP/IP connection or you may get old messages a second time. > An

Re: [time-nuts] was: Odd-order multi Now: fft analyzer woes

2020-01-23 Thread Gerhard Hoffmann
Hi, Abdul! Am 21.01.20 um 19:10 schrieb Prologix: Prologix controllers pass data as is from the instrument to PC. It does not add any termination characters. But then there is the ++eot command just to set up this. ++eos command controls how termination is handled for data going the other

Re: [time-nuts] Symmetricom 023-63008-07 5MHz Crystal Oscillators

2020-01-23 Thread Gerhard Hoffmann
Am 23.01.20 um 19:12 schrieb Bob kb8tq: Hi If you do try it, double balanced mixers seem like the way to go. Two 5’s into one mixer gives you 10, a low level spur at 5 and some crud at DC. Duplicate that with another mixer and you have a second 10. Maybe go into a low Q filter to clean it up

Re: [time-nuts] Symmetricom 023-63008-07 5MHz Crystal Oscillators

2020-01-23 Thread Jerry Hancock
it looks like the new ones are all gone for now. I got three for $64 shipped. Great deal, I think. Regards, Jerry > On Jan 23, 2020, at 10:30 AM, Taka Kamiya via time-nuts > wrote: > > I believe the seller is in Hong Kong. I've dealt with him before on > Ebay."QUEENS" land > >

Re: [time-nuts] Symmetricom 023-63008-07 5MHz Crystal Oscillators

2020-01-23 Thread Bob kb8tq
Hi If you do try it, double balanced mixers seem like the way to go. Two 5’s into one mixer gives you 10, a low level spur at 5 and some crud at DC. Duplicate that with another mixer and you have a second 10. Maybe go into a low Q filter to clean it up a little. Since you have loss in the

Re: [time-nuts] Symmetricom 023-63008-07 5MHz Crystal Oscillators

2020-01-23 Thread Taka Kamiya via time-nuts
I believe the seller is in Hong Kong.  I've dealt with him before on Ebay."QUEENS" land --- (Mr.) Taka Kamiya KB4EMF / ex JF2DKG On Thursday, January 23, 2020, 12:08:23 PM EST, wrote: Bob, I just might play at the mixing to see if it will

[time-nuts] Symmetricom 023-63008-07 5MHz Crystal Oscillators

2020-01-23 Thread cdelect
Bob, I just might play at the mixing to see if it will work! Hmmm, 16 oscillators give a cold current of 12.8 Amps! The direct sellers you find with Google sell them for <$20.00 each. One of them: https://www.teewtfstore.com/index.php?main_page=product_info_id= 244548 This seller (can't