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
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
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
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
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
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 kb...@n1k.org wrote:
Hi
Ok, off into
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,
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
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
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.
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
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
On 1 January 2015 at 17:03, Andy Bardagjy andybarda...@gmail.com 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
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
of 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
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 complete
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
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
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
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
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
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
: ...
/tvb
- Original Message -
From: Timestep informat...@time-step.com
To: time-nuts@febo.com
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 58503A
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
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
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 mdan...@gmail.com 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
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
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
idiot. I just loaded it down
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
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
Peter Bell bell.peter@... 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
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
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
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 Earth
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
Azelio Boriani 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*
Hal Murray hmurray@... 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
Doug Reed n0nas@... 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
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 dekag...@gmail.comwrote:
Hal Murray
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.
Azelio Boriani 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
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
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 switching
Hal Murray hmurray@... 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.
Azelio Boriani 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
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 dekag...@gmail.comwrote:
Azelio Boriani azelio.boriani@... writes:
Why are you assuming this is a protocol or signal label? Maybe a
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 azelio.bori...@screen.itwrote:
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,
OK, so a digital 'scope is needed or, at least, with memory.
On Thu, Aug 2, 2012 at 1:12 PM, Peter Bell bell.pe...@gmail.com 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
Azelio Boriani 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 bell.peter@... wrote:
My guess is that it's a PP2S / Even Second output - that would also match
with the label...
OK Azelio, good idea,
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
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 a
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...
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 dekag...@gmail.comwrote:
Hi all,
I have a question on my 58503A:
no problems aside, it is running for several years without
-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.
Does anyone know
-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/n
53131-60002). The good news
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
56 matches
Mail list logo
