[time-nuts] HP 58503A Flashing Front Panel LEDs

Hi, I recently purchased an HP 58503A from eBay. When I power it on, with or without an antenna, the power LED illuminates on the front panel, followed by each LED one at a time. Then, after a moment, the unit alternates between all front panel LEDs being illuminated and only the power LED at a

Re: [time-nuts] HP 58503A question (EFC: Err)

Mitch, Thanks for the screen shot. That means 99% of your 58503 is working; very good news. If you look at the last line if your screen shot (attached), the self-test is failing due to EFC (Electronic Frequency Control), the voltage that pulls the quartz oscillator low or high to keep it locke

[time-nuts] HP 58503A GPS time and frequency receiver - How do I determine why the ALARM LED is on?

I've got an HP 58503A purchased from China a couple of years ago. It has a bit of a hard life, having been in water at some time. But it seems to work ok, as far as I can tell. Today there was a power failure for 5 minutes or so. The red ALARM LED is on. It is not clear to me why, although of cours

[time-nuts] HP 58503A chassis part needed

Hello, I'm in the process of restoring my 58503A. In the process of disassembling it, the rear plastic frame that is held to the back panel with the two T15 Torx screws had become brittle with age and it cracked into several pieces as I was removing it. It will be difficult to get all of the sm

[time-nuts] HP 58503A failure

I have had an HP 58503A GPSDO with the Option 001 display running continuously for over ten years without a problem-that is, until today. When I looked at it this morning, the display was showing a valid time, but it was frozen and not advancing. Pushing on the buttons had no effect. I unplugged it

Re: [time-nuts] HP 58503A Com 4 conflict

Thanks Bob, Didier and Rex for the "consult" on the Com 4 Conflict and the teaching. Update: First, sorry for not posting adequate information in my question to start with. The result of some emails was a clarification that it was not the 58503A which was causing the issue with the Com ports,

Re: [time-nuts] HP 58503A Com 4 conflict

You left out a lot of details, like what OS your PC is running, Assuming it is Windows XP or greater, you may be able to juggle the assigned com port. If you are using a USB/serial adapter, be sure it is plugged in so it shows on the devices list. You need to open Device Manager. One way is

Re: [time-nuts] HP 58503A Com 4 conflict

To add a small dose of additional complexity, Visual Basic 6.0 (and I suspect other dev tools of that generation) only support COM ports up to 16. Not as bad as 4, but still a problem on occasion. Didier KO4BB On January 4, 2015 12:03:05 PM CST, Bob Camp wrote: >Hi > >Ok, off into serial land

Re: [time-nuts] HP 58503A Com 4 conflict

Hi Ok, off into serial land …. The GPSDO does not really know or care what port it’s on. It will be just as happy on port 119 as on port 4. It (by design) does care about the baud rate / data bits / parity / stop bits. This is as true with a USB to serial as with a direct serial card. That’s

[time-nuts] HP 58503A Com 4 conflict

My new old HP58503A wants to connect to my PC on Com 1-4. Other PC devices are already using those 4 Com ports. Is there any way to connect it to a Com port other than one of those 1 to 4? I currently use an Edgeport USB-to-Serial Converter which works very well to communicate with the PC an

Re: [time-nuts] HP-58503A

Hi, The past week I had to replace more than 30 capacitors in various of my home electronics, some were bulged and others not so. There were 7 in a computer motherboard, 10 in other, 8 in a TV set power supply, 2 in an external USB disk power supply and the rest in other things, I know the gra

Re: [time-nuts] HP-58503A

On 1 January 2015 at 17:03, Andy Bardagjy wrote: > Sounds like the GPS receiver is hosed. I think there are two different > receivers used in the 58503a, unfortunately I'm away from my lab, otherwise I > could check mine. It is a standard part, and may be available on the surplus > market. > >

Re: [time-nuts] HP-58503A

Sounds like the GPS receiver is hosed. I think there are two different receivers used in the 58503a, unfortunately I'm away from my lab, otherwise I could check mine. It is a standard part, and may be available on the surplus market. Before replacing, I'd check the usual suspects, power supply

[time-nuts] HP-58503A

This list was recommended to me by the elecraft list. I have an HP-58503A sat disciplined “clock” that puts out a steady 10MHz to my K3 radio. Its been working 24/7 for years, I monitor it with David Anderson's Mac GPS Control X software on my iMac. Several days ago error messages showed up i.

Re: [time-nuts] HP 58503A service manual with schematics

precise time and frequency measurement Subject: Re: [time-nuts] HP 58503A service manual with schematics hi John I am new in the list but not in the art here a lot of manuals http://exodus.poly.edu/~kurt/manuals/manuals/HP%20Agilent/ Gianni In 28 maggio 2014, starb...@uplink.net scritto: > Hello

Re: [time-nuts] HP 58503A service manual with schematics

hi John I am new in the list but not in the art here a lot of manuals http://exodus.poly.edu/~kurt/manuals/manuals/HP%20Agilent/ Gianni In 28 maggio 2014, starb...@uplink.net scritto: > Hello to the time experts, > I own a nice HP-58503A and I would be happy > to find a pdf version of the complet

[time-nuts] HP 58503A service manual with schematics

Hello to the time experts, I own a nice HP-58503A and I would be happy to find a pdf version of the complete service manual for it. Is somebody in the position to help me or to give me a hint where I could find it? Thank you very much, regards, John __

[time-nuts] HP 58503A Service Manual with schematics

Does anyone have a service manual for the HP 58503A GPS Time and Frequency Receiver? Thanks, John ___ 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

Re: [time-nuts] HP 58503A acurate UTC time

HP 58503A Hi Hal Good point, I don't want the display lighting my office up at night, hence I often turn it off. What I really need is the circuit of the front panel, then I could dim the display and leave in on 24/7 Thanks Dave ___ time-nuts ma

Re: [time-nuts] HP 58503A acurate UTC time

> So the question is, will this really stop the annoying survey every time ? I'd browse the manual looking for fine print. The idea you are looking for is that after a survey it will save the location. If it has a saved location on power up it will use it rather than do a new survey. The othe

Re: [time-nuts] HP 58503A acurate UTC time

Thanks guys It is now reading UTC, but only after a power off routine. That confused me ! I can't afford the time to let it re-survey, and used the Query command with a "0" instead of a "?". Re-querying it with a question mark it replied that there would be no survey on power up. The iPhone

Re: [time-nuts] HP 58503A acurate UTC time

> a.. So how do I set it to read real time ? My notes say that for a Z3801A: :diag:gps:utc 1 It may need a reboot. A google search for >HP 58503A manual< gets lots of hits that look interesting. This is the top of the list: 58503B GPS Time and Frequency Reference ... - LeapSecond.com ww

Re: [time-nuts] HP 58503A acurate UTC time

:GPS:POS: ... /tvb - Original Message - From: "Timestep" To: Sent: Tuesday, March 11, 2014 11:33 AM Subject: [time-nuts] HP 58503A acurate UTC time > From: Dave Cawley > Timestep Dartmouth > Tel: +44 (0) 1803 833366 > Fax: +44 (0) 1803 839498 > > HP 585

[time-nuts] HP 58503A acurate UTC time

From: Dave Cawley Timestep Dartmouth Tel: +44 (0) 1803 833366 Fax: +44 (0) 1803 839498 HP 58503A accurate UTC time I have the version with the display panel and also the SatStat50 software all working fine. The time on both the display and PC appears to be 16 seconds fast. I queried the l

Re: [time-nuts] HP 58503A/B firmware

t; Sent: Monday, 13 May 2013 1:47 PM > To: time-nuts@febo.com > Subject: [time-nuts] HP 58503A/B firmware > > I am trying to track down the HP 58503A/B firmware. > > Could some kind soul point me in the right direction please? > > > mark > > > ___

Re: [time-nuts] HP 58503A/B firmware

-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Monday, 13 May 2013 1:47 PM To: time-nuts@febo.com Subject: [time-nuts] HP 58503A/B firmware I am trying to track down the HP 58503A/B firmware. Could some kind soul point me in the right direction p

Re: [time-nuts] HP 58503A/B firmware

Never found the 58503 firmware and I don't think it is readable from the 58503. On Mon, May 13, 2013 at 5:46 AM, Mark C. Stephens wrote: > I am trying to track down the HP 58503A/B firmware. > > Could some kind soul point me in the right direction please? > > > mark > > > Kind Regards, > Mark Ste

[time-nuts] HP 58503A/B firmware

I am trying to track down the HP 58503A/B firmware. Could some kind soul point me in the right direction please? mark Kind Regards, Mark Stephens Mark C Stephens | Customer service engineer | Non-Stop Computer Ltd * +61 2 9011 8186 | ( +61 428 256 334 | * ma...@non-stop.com.au

Re: [time-nuts] Hp 58503A

I just loaded it down with a 50 ohm load and looks perfect. One of my design pet peeves is not anticipating what users may do. For example, not anticipating that someone might terminate an output in a high impedance rather than in the rated impedance, or leave unused outputs unterminated.

Re: [time-nuts] Hp 58503A

No problem, happens to me too some times, usually the 10MHz Sine should be loaded with 50 Ohms, and the CMOS/TTL 1PPS pulses should be run open-ended (1M or higher).. I say usually.. because there are cases where proper termination is critical such as LVDS 1PPS outputs.. and where the 10MHz

Re: [time-nuts] Hp 58503A

I overlooked it also. Glad the problem is resolved. Thomas Knox > Date: Tue, 16 Oct 2012 12:31:13 -0400 > From: mdan...@gmail.com > To: time-nuts@febo.com > Subject: Re: [time-nuts] Hp 58503A > > I guess this it what they would call a rookie move? WOW, i feel like an >

Re: [time-nuts] Hp 58503A

I guess this it what they would call a rookie move? WOW, i feel like an idiot. I just loaded it down with a 50 ohm load and looks perfect. Thanks for enlightening me. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.

Re: [time-nuts] Hp 58503A

Mark, Are you loading the 10Mhz output with 50 Ohms when you measure it? Said Sent from my iPad On Oct 16, 2012, at 6:52, Mark Danon wrote: > Hey guys, new to the group here and wanted to throw a question out there. I > just picked up an HP 58503A and hooked it all up. I have it connected t

[time-nuts] Hp 58503A

Hey guys, new to the group here and wanted to throw a question out there. I just picked up an HP 58503A and hooked it all up. I have it connected to my computer and I can see the system status via satstat and all looks to be working correctly. However, I notice that there is distortion on the 10

Re: [time-nuts] HP 58503A

Hal Murray writes: > > > dekagoon@... said: > > with my analog scope (Hameg HM2005-2) I can trigger a low level voltage > > spike signal with a p-p voltage of 30 mV and a frequency of 52,6 kHz. Could > > that be real? The signal level is very low, 30 mV... > > That sounds like junk pickup.

Re: [time-nuts] HP 58503A

dekag...@gmail.com said: > with my analog scope (Hameg HM2005-2) I can trigger a low level voltage > spike signal with a p-p voltage of 30 mV and a frequency of 52,6 kHz. Could > that be real? The signal level is very low, 30 mV... That sounds like junk pickup. My guess would be from a switchi

Re: [time-nuts] HP 58503A

Hello followers, I can state that my measuring of the signal (30 mV, 65,2 kHz) was caused by the serial line of the com port of the receiver... :-) After looking for sources of the noisy signal I disconnected my first the GPS antenna signal from the 58512A GPS amplifier. -> Signal intact Then I

Re: [time-nuts] HP 58503A

Azelio Boriani writes: > > Here: > www.leap*second*.com/museum/*hp58503*a/097-58503-12-iss-1.pdf > you can find that there is the option 002 for the even second but they call > it PP2S... > Try to discover if your 58503 has this option 002. > Azelio, thanks for the link but I already know thi

Re: [time-nuts] HP 58503A

OK, that's what I get for working from memory. :-) I got the idea more or less right but it has nothing to do with the abbreviation under discussion Thanks for the correction. 73, Doug. b...@lysator.liu.se wrote: Doug, I ran into a wiki description of GPS using WGS84 a couple days ago. I

Re: [time-nuts] HP 58503A

Here: www.leap*second*.com/museum/*hp58503*a/097-58503-12-iss-1.pdf you can find that there is the option 002 for the even second but they call it PP2S... Try to discover if your 58503 has this option 002. On Fri, Aug 3, 2012 at 5:09 PM, Christoph Kopetzky wrote: > Hal Murray writes: > > > > We

Re: [time-nuts] HP 58503A

Doug Reed writes: > > I ran into a wiki description of GPS using WGS84 a couple days ago. It > included a mention of ESEC and it was something like: Earth Static, > Earth Centric. I think I was following a link about the Z3801A. > > It referred to the fact that lat-lon is referenced to a stat

Re: [time-nuts] HP 58503A

Hal Murray writes: > We discussed this area a week or three ago. > > You don't need a digital scope to determine if there is a pulse. A digital > scope may help to see the pulse and figure out what it looks like. > > With an analog scope, you can either look at the blinking light that tells

Re: [time-nuts] HP 58503A

Azelio Boriani writes: > > What 'scope are you using (brand and model)? TLL is 5V, CMOS 4000 series > can be 15V but runs starting at 3V. Set the scope vertical (channel 1) at > 1V/div (probe at 10:1), use NORMAL for the trigger and set the trigger (for > the channel 1) *slowly* from 0V to +200m

Re: [time-nuts] HP 58503A

What 'scope are you using (brand and model)? TLL is 5V, CMOS 4000 series can be 15V but runs starting at 3V. Set the scope vertical (channel 1) at 1V/div (probe at 10:1), use NORMAL for the trigger and set the trigger (for the channel 1) *slowly* from 0V to +200mV (assuming that the trigger isn't a

Re: [time-nuts] HP 58503A

Doug, > I ran into a wiki description of GPS using WGS84 a couple days ago. It > included a mention of ESEC and it was something like: Earth Static, > Earth Centric. I think I was following a link about the Z3801A. > > It referred to the fact that lat-lon is referenced to a static grid on > the Ea

Re: [time-nuts] HP 58503A

On 8/2/12 6:24 PM, Doug Reed wrote: I ran into a wiki description of GPS using WGS84 a couple days ago. It included a mention of ESEC and it was something like: Earth Static, Earth Centric. I think I was following a link about the Z3801A. It referred to the fact that lat-lon is referenced to a s

Re: [time-nuts] HP 58503A

I ran into a wiki description of GPS using WGS84 a couple days ago. It included a mention of ESEC and it was something like: Earth Static, Earth Centric. I think I was following a link about the Z3801A. It referred to the fact that lat-lon is referenced to a static grid on the Earth and doesn'

Re: [time-nuts] HP 58503A

Peter Bell writes: > > If it is, then you should see a pulse every 2 seconds, lined up with the > even seconds in GPS time. This might seem a rather strange signal to > provide, but it's what the IS-95 derived CDMA systems use to trigger the > start of another 100 block signalling frame. It al

Re: [time-nuts] HP 58503A

>> My guess is that it's a PP2S / "Even Second" output - that would >> also match with the label... azelio.bori...@screen.it said: > OK, so a digital 'scope is needed or, at least, with memory. We discussed this area a week or three ago. You don't need a digital scope to determine if there is

Re: [time-nuts] HP 58503A

If it is, then you should see a pulse every 2 seconds, lined up with the even seconds in GPS time. This might seem a rather strange signal to provide, but it's what the IS-95 derived CDMA systems use to trigger the start of another 100 block signalling frame. It also tends to suggest that the uni

Re: [time-nuts] HP 58503A

Azelio Boriani writes: > > OK, so a digital 'scope is needed or, at least, with memory. > > On Thu, Aug 2, 2012 at 1:12 PM, Peter Bell wrote: > > > My guess is that it's a PP2S / "Even Second" output - that would also match > > with the label... > > OK Azelio, good idea, I will check that if

Re: [time-nuts] HP 58503A

OK, so a digital 'scope is needed or, at least, with memory. On Thu, Aug 2, 2012 at 1:12 PM, Peter Bell wrote: > My guess is that it's a PP2S / "Even Second" output - that would also match > with the label... > > On Thu, Aug 2, 2012 at 5:02 PM, Azelio Boriani >wrote: > > > OK, it is in the plac

Re: [time-nuts] HP 58503A

My guess is that it's a PP2S / "Even Second" output - that would also match with the label... On Thu, Aug 2, 2012 at 5:02 PM, Azelio Boriani wrote: > OK, it is in the place of the PPS output... can you hook an oscilloscope > and see if there is any output? > > On Thu, Aug 2, 2012 at 10:25 AM, Chr

Re: [time-nuts] HP 58503A

OK, it is in the place of the PPS output... can you hook an oscilloscope and see if there is any output? On Thu, Aug 2, 2012 at 10:25 AM, Christoph Kopetzky wrote: > Azelio Boriani writes: > > > > > Why are you assuming this is a protocol or signal label? Maybe a > > maintenance or repair-by-exc

Re: [time-nuts] HP 58503A

Azelio Boriani writes: > > Why are you assuming this is a protocol or signal label? Maybe a > maintenance or repair-by-exchange indication too. > Because the label is above the bnc connector on the back side of the 58503A beside the bnc connector with an alarm label. The 58503A has the singl

Re: [time-nuts] HP 58503A

Why are you assuming this is a protocol or signal label? Maybe a maintenance or repair-by-exchange indication too. On Wed, Aug 1, 2012 at 11:40 PM, Christoph Kopetzky wrote: > Hi all, > > I have a question on my 58503A: > > no problems aside, it is running for several years without > any problems

[time-nuts] HP 58503A

Hi all, I have a question on my 58503A: no problems aside, it is running for several years without any problems. But now I am cleaning my devices and I am reading the label "ESEC" again on the back. So the question comes up again, what is ESEC? Google knows nothing about the signal or protocol...

Re: [time-nuts] HP 58503A Dim Display Replacement

: time-nuts@febo.com > Date: Wed, 25 Jul 2012 17:37:52 -0700 > Subject: Re: [time-nuts] HP 58503A Dim Display Replacement > > Hi Jeff, > > The VFD module is identical to the ones used in the 53131A and 53132A > counters. It is a part of the A2 input assembly in the counters (p

Re: [time-nuts] HP 58503A Dim Display Replacement

[time-nuts] HP 58503A Dim Display Replacement Message-ID: <1924087406.102486.1343176142270.javamail.r...@sz0079a.emeryville.ca.mail.co mcast.net> Content-Type: text/plain; charset=utf-8 Hi, I have an older HP 58 503A with option 001 display but it is very dim from age.

[time-nuts] HP 58503A Dim Display Replacement

Hi, I have an older HP 58 503A with option 001 display but it is very dim from age. Does anyone know of a replacement display IC for this? Thanks Jeff ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.