Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-23 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
On 22 December 2016 at 20:54, Bill Byrom wrote: > Read about the synthesizer design of that generator here: > > https://ia600407.us.archive.org/10/items/Hewlett-Packard_ > Journal_Vol._42_No._2_1991-04_Hewlett-Packard/Hewlett- >

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-23 Thread Bob Camp
Hi On a sweep generator with a magnet tuned YIG, supply ripple is a very common issue …. Bob > On Dec 22, 2016, at 9:00 PM, n2lym wrote: > > Hi Bob, > > I don't have issues at 60, 120, or 180Hz in a 60Hz country. Even with a 500KV > line a few thousand feet away. I can

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-23 Thread Scott McGrath
I think case #1 tells you that the frequency step is not occurring on the sweeper as both The source and receiver are locked to GPS and no trace of the step effect is seen I would be much more inclined to think that the transverter is encountering some type of power supply related artifact.

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-23 Thread n2lym
Hi Bob, I don't have issues at 60, 120, or 180Hz in a 60Hz country. Even with a 500KV line a few thousand feet away. I can hear the corona on the ham bands at times. Mike On Thu, Dec 22, 2016 at 05:15 PM, Bob Camp wrote: Hi In a country with 50 Hz power lines, figuring out anything

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-22 Thread Bob Camp
Hi In a country with 50 Hz power lines, figuring out anything at 50, 100 or 150 Hz is going to be a bit exciting. Bob > On Dec 22, 2016, at 4:04 PM, n2lym wrote: > > Dave, > > Look at it with a narrow band SA and see if it's modulated by 100Hz. > > 73, > > Mike N2LYM

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-22 Thread Bill Byrom
Read about the synthesizer design of that generator here: https://ia600407.us.archive.org/10/items/Hewlett-Packard_Journal_Vol._42_No._2_1991-04_Hewlett-Packard/Hewlett-Packard_Journal_Vol._42_No._2_1991-04_Hewlett-Packard.pdf Dave, looking at the graph you posted it appears to me that the

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-22 Thread n2lym
Dave, Look at it with a narrow band SA and see if it's modulated by 100Hz. 73, Mike N2LYM On Thu, Dec 22, 2016 at 07:39 AM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote: On 22 December 2016 at 03:17, paul swed wrote: Dave Congratulations on 10 Ghz SSB. This was not a QSO at

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-22 Thread Brooke Clarke
Hi David: Some time ago I built an automated mixer test system where I first attempted to use HP 8350B sweep generators as the sources for the LO and RF inputs, but this failed to work because at the narrow bandwidth settings on the HP 8566 spectrum analyzer there was way too much phase noise,

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-22 Thread David
On Thu, 22 Dec 2016 12:39:27 +, you wrote: >But I find it a bit odd that HP would have a 1 Hz software option on this >instrument, if the instrument jumped up/down 100 Hz. > >Now I don't yet have the 1 Hz option programmed in, and it might well >change the behavior completely, but I'd still

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-22 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
On 22 December 2016 at 01:35, Brooke Clarke wrote: > Hi David: > > Do you have a comb generator? > No. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-22 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
On 22 December 2016 at 03:51, Tom Knox wrote: > If it is any help, the 836XXA/B series are all capable of 1Hz resolution > but are locked at 1KHz unless you enter the license key for option 008. So > it could be software/firmware related. > > Happy Merry; > > Thomas Knox > I

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-22 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
On 22 December 2016 at 03:17, paul swed wrote: > Dave Congratulations on 10 Ghz SSB. > This was not a QSO at all. It was simply a one way transmission from a signal generator at my end to a receiver at his end. No QSO was attempted. > Now to your question. I will fully

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-22 Thread wb6bnq
Dr. David Kirkby (Kirkby Microwave Ltd) wrote: snip .. The radio ham that noticed this step change in frequency is well used to listening on 10 GHz, and hearing beacons. So I think its reasonable to assume that the problem is not his end, but my end. Any thoughts, which do NOT include

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-21 Thread Tom Knox
com> on behalf of Dr. David Kirkby (Kirkby Microwave Ltd) <drkir...@kirkbymicrowave.co.uk> Sent: Wednesday, December 21, 2016 4:42 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when no

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-21 Thread paul swed
Dave Congratulations on 10 Ghz SSB. Now to your question. I will fully believe you are seeing normal behavior of the generators. Even if its dithering 100 Hz thats pretty amazing. Sweep gens simply are not stable enough for narrow work like you are trying. Now I am sure comments will prove me

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-21 Thread Brooke Clarke
Hi David: Do you have a comb generator? -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html The lesser of evils is still evil. Original Message I run a test over the weekend with a fellow radio ham. I transmitted 100 mW or so

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-21 Thread Scott McGrath
Can you use the VNA as a receiver? And determine whether the 100Hz shift is also seen on the VNA > On Dec 21, 2016, at 7:31 PM, Dr. David Kirkby (Kirkby Microwave Ltd) > wrote: > > On 21 December 2016 at 23:42, Dr. David Kirkby (Kirkby Microwave Ltd) < >

[time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-21 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
I run a test over the weekend with a fellow radio ham. I transmitted 100 mW or so at 10368.115 MHz from an HP 83623A 10 MHz to 20 GHz sweep generator http://www.keysight.com/en/pd-101862%3Aepsg%3Apro-pn-83623A/synthesized-sweeper-10-mhz-to-20-ghz-high-power?cc=GB=eng into a small horn

Re: [time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

2016-12-21 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
On 21 December 2016 at 23:42, Dr. David Kirkby (Kirkby Microwave Ltd) < drkir...@kirkbymicrowave.co.uk> wrote: > But one thing to possibly is > > * Set sweep generator to 10.368 GHz > * Set sweep generator to 10.378 GHz, so there's a 10 MHz difference. > I mean set the VNA to 10.378 GHz, so