Re: [time-nuts] Z3815A Unofficial Docs

Hello all, After some time and some twists and turns in life, I've found time to work with my GPSDO's again. I've added two Z3815A's to my collection, after wanting to do so for a number of years. After reading through the listserv's historical posts to re-acquaint myself with the units (and th

Re: [time-nuts] Z3815A front panel status indicator

This Time-Nuts (archive) thread from January 2010 may be helpful. Some of this information came from i.fluke (eBay reseller from East Asia) https://www.febo.com/pipermail/time-nuts/2010-January/043928.html Originally designed by HP, and made under licence by Chongho in Korea, the Z3815A used the

Re: [time-nuts] Z3815A front panel status indicator

On 2/26/2016 12:58 PM, Dickson Fu wrote: Hi all, A bit frustrated with my newly bought Z3815A. After power up, the "Block" indicator stays lit and no other LED turns on except Power indicator. It appears that GPS has never discipling. I cannot find any user manual for Z3815A and other hp smartc

[time-nuts] Z3815A front panel status indicator

Hi all, A bit frustrated with my newly bought Z3815A. After power up, the "Block" indicator stays lit and no other LED turns on except Power indicator. It appears that GPS has never discipling. I cannot find any user manual for Z3815A and other hp smartclock does not have the same front panel des

Re: [time-nuts] Z3815A date problem fixed?

On 26/01/14 02:33, Morris Odell wrote: Thanks for the reply Magnus. I know the frequency control function is unaffected by the date problem but I'm far too obsessional to ignore it :-) I contemplated the AVR solution to correct the code but once I looked at the output of the receiver with a MAX2

Re: [time-nuts] Z3815A date problem fixed?

Thanks for the reply Magnus. I know the frequency control function is unaffected by the date problem but I'm far too obsessional to ignore it :-) I contemplated the AVR solution to correct the code but once I looked at the output of the receiver with a MAX232 as suggested here, I found there were

Re: [time-nuts] Z3815A date problem fixed?

On 24/01/14 11:59, Morris Odell wrote: Hi all, There was some consternation here 5 months ago when Z3815A GPSDOs began reporting a date 1024 weeks in the past. This was due to a storage overflow condition in the Furuno GPS receiver in the Z3915A. The designers probably never anticipated that the

Re: [time-nuts] Z3815A receiver transplant

Hi Morris, You should be able to bridge one of the TTL to RS-232 ports on a MAX232 onto the line from the Z3815A to the GT-8031. This will let you capture the commands the Z3815A sends by using any terminal program. Similarly, if you bridge onto the line from the GT-8031 to the Z3815A you ca

[time-nuts] Z3815A receiver transplant

Hi all, The Z3815A is working perfectly with the new receiver except for a persistent antenna alarm. The new receiver is reporting the antenna is OK but it must have a different self-test answer sentence to the old one. The self-test is a PFEC sentence, which is proprietary to the manufacturer and

[time-nuts] Z3815A date problem fixed?

Hi all, There was some consternation here 5 months ago when Z3815A GPSDOs began reporting a date 1024 weeks in the past. This was due to a storage overflow condition in the Furuno GPS receiver in the Z3915A. The designers probably never anticipated that they would still be in use 20 years later...

Re: [time-nuts] Z3815A show 0ns Predicted uncertainty

2013 12:46 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A show 0ns Predicted uncertainty marki wrote: >My Z3805A are usually in the 1-4us range. >I was pleasantly surprised to see the nanoseconds! > >I must ask, do you have the later Z3

Re: [time-nuts] Z3815A show 0ns Predicted uncertainty

[mailto:time-nuts-boun...@febo.com] On Behalf Of Charles P. Steinmetz Sent: Friday, 28 June 2013 10:26 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A show 0ns Predicted uncertainty marki wrote: >I noticed my Z3815A was show 0ns (zero) for predicted uncertai

Re: [time-nuts] Z3815A show 0ns Predicted uncertainty

My Z3815A has never shown a holdover prediction in the ns range... maybe it needs a very long running time (years) to adjust the SmartClock parameters. Mine has been on for only 1 year. On Fri, Jun 28, 2013 at 2:25 PM, Charles P. Steinmetz wrote: > marki wrote: > >> I noticed my Z3815A was show 0

Re: [time-nuts] Z3815A show 0ns Predicted uncertainty

Hi The holdover prediction is entirely dependent on the OCXO and how it's behaving. Your OCXO likely had a pair of events that caused the aging estimate to get very low. Bob On Jun 28, 2013, at 8:16 AM, Mark C. Stephens wrote: > I noticed my Z3815A was show 0ns (zero) for predicted uncertain

[time-nuts] Z3815A show 0ns Predicted uncertainty

I noticed my Z3815A was show 0ns (zero) for predicted uncertainty tonight. Is there something wrong or is its predicted holdover uncertainty below measureable (displayable) value? Is there a pForth command that would give me an accurate figure for PHU? My 5 other Z3805A smartclocks are all in the

Re: [time-nuts] Z3815A pinout

f Bob Camp Sent: Thursday, 6 June 2013 8:46 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A pinout Hi What I'm pointing out is that there are indeed *real* HP made Z3815A's in boxes. Ones without the crud, corrosion, flying soldered leads, an

Re: [time-nuts] Z3815A pinout

antenna, it never saw more than 4 satellites, and even those had weak >>>>> signals. > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Bob Camp > Sent: Thursday, 6 June 2013 12:10 PM > To: Disc

Re: [time-nuts] Z3815A pinout

In message <95e6ce90-5629-4a8b-900f-7f32ccc22...@rtty.us>, Bob Camp writes: >Well if the Z3815 boxes are all fakes, they did a *really* good >job on making up all the HP logo's and HP stickers. They even faked >the right date codes for the add on stickers. They also did a very >nice job with the c

Re: [time-nuts] Z3815A pinout

n those had weak >>>> signals. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Thursday, 6 June 2013 12:10 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A pinout H

Re: [time-nuts] Z3815A pinout

ese eBay sellers. > About 50% power on, but have poor performance. > This is hearsay of course, YMMV.. > > > -marki > > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Magnus Danielson > Sent: Thursday, 6 June

Re: [time-nuts] Z3815A pinout

Danielson Sent: Thursday, 6 June 2013 7:23 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Z3815A pinout On 06/05/2013 11:16 PM, Bob Camp wrote: > Hi > > There are two very different 3815's out there. One comes in a nice box > with rational connectors on it. (They are expensiv

Re: [time-nuts] Z3815A pinout

On 06/05/2013 11:16 PM, Bob Camp wrote: Hi There are two very different 3815's out there. One comes in a nice box with rational connectors on it. (They are expensive). The other one is the plug in card that always seems to need a good scrub down. It appears to have the same "stuff" but connectin

Re: [time-nuts] Z3815A pinout

e are about 1/2 to 1/3 the price of the other ones... Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Magnus Danielson Sent: Wednesday, June 05, 2013 4:59 PM To: time-nuts@febo.com Subject: [time-nuts] Z3815A pinout Fellow time-nuts,

[time-nuts] Z3815A pinout

Fellow time-nuts, There used to be a PDF around with details of pin-out and modifications for the Z3815A. I fail to locate it at any of the usual places, including google, Didier, TVB, Brooke etc... I fail to find it in any of my archives as well. I would appreciate if someone could share a

Re: [time-nuts] Z3815A

ehalf Of Mark C. Stephens Sent: Thursday, 30 May 2013 4:14 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A I ran efc_comp and the efc table is slowly filling! p4th D > efc_rep 1.115185 672147.2 1 6.721472e+05 0.00e+00 0.00e+00 2.115185 67

Re: [time-nuts] Z3815A

Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Thursday, 30 May 2013 5:40 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A This is an excerpt of my Z3815A's efc_rep: efc_rep 5

Re: [time-nuts] Z3815A

populate it... > efc_comp looks like a likely candidate but, to quote TVB, "I got a little > nervous about playing pforth roulette" ... > > > -marki > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf

Re: [time-nuts] Z3815A

From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Wednesday, May 29, 2013 12:02 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A Hmm, Something is awry with this particular Z3815A: e.g. p4th D >

Re: [time-nuts] Z3815A

lf Of Azelio Boriani Sent: Thursday, 30 May 2013 12:00 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A Here the figures are the same, except: start ptr is 24 and stop ptr is 23 and last efc average is 680694.8 and not 0.0 On Wed, May 29, 2013 at 3:53 PM, A

Re: [time-nuts] Z3815A

> >> -marki >> >> >> -Original Message- >> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >> Behalf Of Azelio Boriani >> Sent: Wednesday, 29 May 2013 11:09 PM >> To: Discussion of precise time and frequency measurement >

Re: [time-nuts] Z3815A

smart clocks) or some time later? > > > -marki > > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Azelio Boriani > Sent: Wednesday, 29 May 2013 11:09 PM > To: Discussion of precise time and frequency measurement

Re: [time-nuts] Z3815A

p Sent: Wednesday, 29 May 2013 9:03 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A Hi Well, probably as good as the manual ... we have the guy who designed it (Rick Karlquist) lurking around here somewhere. I don't think I've ever seen a m

Re: [time-nuts] Z3815A

he excessive current sink culprits. >> Anyone got a manual for the e1398a OCXO? >> >> >> -marki >> >> -Original Message- >> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] >> On Behalf Of Mark C. Stephens >> Sent: Wednesday, 29 Ma

Re: [time-nuts] Z3815A

; Anyone got a manual for the e1398a OCXO? >> >> >> -marki >> >> -Original Message- >> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >> Behalf Of Mark C. Stephens >> Sent: Wednesday, 29 May 2013 12:36 PM >> To:

Re: [time-nuts] Z3815A

got a manual for the e1398a OCXO? > > > -marki > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Mark C. Stephens > Sent: Wednesday, 29 May 2013 12:36 PM > To: Discussion of precise time and frequency m

Re: [time-nuts] Z3815A

-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Wednesday, 29 May 2013 12:36 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A I believe these were all rescued from the Tip (Dump, Trash) judging by the water damage and bent cases. Mine had

Re: [time-nuts] Z3815A

Of Stewart Cobb Sent: Wednesday, 29 May 2013 8:13 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Z3815A Your Z3815A may need more cooling than it's getting, especially if you have it resting "horizontally" as it looks like it should. I bought one of those "kits from China&

Re: [time-nuts] Z3815A

> I'm powering my Z3815A from 48V, the telecom standard voltage. The Z3801A is available in two ranges: 27V nominal, 19-30V, >23 starting 54V nominal, 37-60V, >46 starting Who uses 24V? What do cell phone towers use? -- These are my opinions. I hate spam.

Re: [time-nuts] Z3815A

I'm powering my Z3815A from 48V, the telecom standard voltage. On Wed, May 29, 2013 at 12:12 AM, Stewart Cobb wrote: > Your Z3815A may need more cooling than it's getting, especially if you have > it resting "horizontally" as it looks like it should. I bought one of > those "kits from China" abo

Re: [time-nuts] Z3815A

Your Z3815A may need more cooling than it's getting, especially if you have it resting "horizontally" as it looks like it should. I bought one of those "kits from China" about a year and a half ago. Powered it up, waited for it to lock ... and it was dead within a week, with the unmistakable smel

Re: [time-nuts] Z3815A

bo.com] On Behalf Of Mark C. Stephens Sent: Tuesday, May 28, 2013 1:32 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A Bob, Its settled down to around 1.3A @ 24V now. I'll up the volts to 28 and see wat happens then. Trying to trace where Port 1 comes

Re: [time-nuts] Z3815A

o.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Wednesday, 29 May 2013 2:36 AM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Z3815A Hi That's more power that it should be pulling. It *should* be happy on anything from abo

Re: [time-nuts] Z3815A

ly. As with any OCXO, the power drops quite a bit after warm up. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Tuesday, May 28, 2013 11:58 AM To: time-nuts@febo.com Subject: [time-nuts] Z3815A Watch Out, I

[time-nuts] Z3815A

Watch Out, I got hold of one.. I have powered it up and its drawing 52W @ 24v. My question is, What is the input voltage range on the Z3815A? Also, one for those familiar with the Z3815A, "Holdover Uncertainty Predict:" is showing 2 dashes ( -- ) >From my experience with the Z380x clocks this us

Re: [time-nuts] Z3815A Internal SMA 10Mhz Output

Hi Nigel, > Then there's the variant of the Trak Microwave 8821B, as just one > example, > that uses a 16.384MHz OCXO from which they derive a 2.048MHz output > without 10MHz anywhere in sight. > When I bought one of those a few years ago I assumed that all 8821Bs > would > be 10MHz GPSDOs, or s

Re: [time-nuts] Z3815A Internal SMA 10Mhz Output

Hi Adrian Yes, I decided that too and may well try it sometime, although it's quite well down the "to do" pile right now, and it's even made slightly easier as it's already divided down internally to 2.048MHz:-) Ironically, when I bought the Trak unit I already had a 2.048MHz master osci

Re: [time-nuts] Z3815A Internal SMA 10Mhz Output

Not necessary in the Z3815A: it has already a 10MHz output. There are 3 SMB connectors near the rear connector, they are labelled so it should be easy for you to locate the 10MHz and the PPS output. Now I can't open my Z3815A to help, it is in use but from the picture found in Internet I see that t

Re: [time-nuts] Z3815A Internal SMA 10Mhz Output

Nigel, you can easily divide the 16.384MHz by 16.384 (2^14) to get 1 kHz for phase locking a 10 MHz oscillator with your GPS box. Adrian gandal...@aol.com schrieb: Not "every" GPSDO has a 10MHz OCXO. 5MHz is, or was, quite common, and I've come across at least one GPSDO with a 10MHz out

Re: [time-nuts] Z3815A Internal SMA 10Mhz Output

10MHz would have certainly been more useful to me as a reference source for test gear, my original intention, than the 2.048MHz I ended up with. Nice easy divide down to 1or 2 KHz though, if only I could find a use for that:-) Those photos are of a Trimble Mini-T, I didn't realise they did t

[time-nuts] Z3815A Internal SMA 10Mhz Output

> >Not "every" GPSDO has a 10MHz OCXO. > That is certainly true although from a time-nuts point of view, 10Mhz is certainly a very nice number. I have linked to a photo of both sides of a Trimble 1.5"x5" GPSDO built about 2008 that has a 1" square Trimble branded OXCO that has a 76.80Mhz a

Re: [time-nuts] Z3815A Internal SMA 10Mhz Output

Not "every" GPSDO has a 10MHz OCXO. 5MHz is, or was, quite common, and I've come across at least one GPSDO with a 10MHz output that I assumed would use a 10MHz OCXO but that also turned out to be based on a 5MHz unit. Then there's the variant of the Trak Microwave 8821B, as just one exampl

Re: [time-nuts] Z3815A Internal SMA 10Mhz Output

Every GPSDO has only one 10MHz signal: the one coming from the OCXO. If there are many outputs they must always be the same. When the GPS has the 3D fix (or the position hold) and the algorithm has synchronized the OCXO, the 10MHz can be said "locked" but, when speaking about GPSDO, the correct wor

[time-nuts] Z3815A Internal SMA 10Mhz Output

In ZL1BPU's GPSR-A User Manual, it mentions that there are internal points that provide access to regenerated system 1pps, 10MHz and 19.6608MHz square wave signals which are present even before the system is locked. After GPZ lock is the internal 10Mhz SMA connector output identical to 10MHz sine

[time-nuts] Z3815A Antenna Connection Question

I am new to the group. Recently got a Z3815A (module type) and was looking at ZL1BPU's User Guide. Don't ask me why but before I soldered a BNC coax to the bottom antenna pads I checked them with an ohmmeter and found 2.5K across the signal pad and ground. I was surprised since there will be

Re: [time-nuts] Z3815A Antenna Pad Query

Well, the TBolt measures 1086OHM on the antenna connector with a test voltage of 3V (2K range on the multimeter) and open circuit when switching to 20K range with 800mV test voltage, positive on antenna and negative on GND. The Motorola M12 has 1940OHM (2K) and open on 20K. The uBlox LEA-5T is open

Re: [time-nuts] Z3815A Antenna Pad Query

Which type of ohmmeter have you used? What voltage does it use to make the measure? What polarity? If the voltage is greater than 700mV and the positive was put on ground maybe some diode has turned on... anyway 2.5K on 5V is 2mA. I have never made such a test on a GPS receiver. I can try on a TBol

[time-nuts] Z3815A Antenna Pad Query

Hello, I am new to the group. Recently got a Z3815A (module type) and was looking at ZL1BPU's User Guide. Don't ask me why but before I soldered a BNC coax to the bottom antenna pads I checked them with an ohmmeter and found 2.5K across the signal pad and ground. I was surprised since there will

Re: [time-nuts] Z3815A Comm timeout

Hi My Z3815A works fine (for weeks and weeks) with the Z8xx program. Bob On Feb 22, 2011, at 4:58 AM, Maxima Hirokazu wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > Hi, > > Thanks for the reply. > The mail I sent didnt come back on the mailing list, > and thought there was an e

Re: [time-nuts] Z3815A Comm timeout

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, Thanks for the reply. The mail I sent didnt come back on the mailing list, and thought there was an error. I'm sorry for the annoying repeating mails. > Have you just tried using a terminal program to > connect to the box to see if that also time

Re: [time-nuts] Z3815A Comm timeout

Le 22/02/2011 05:13, Hirokazu Makishima a écrit : Hi, I got my hands on a Z3815A(with hockey puck) and trying to communicate with it. It seems that Z38XX and gpscon work ok at first, then looses connection in about 30min.(error receiver timeout) If I reestablish connection, it works fine, but i

[time-nuts] Z3815A Comm timeout

Hi, I got my hands on a Z3815A(with hockey puck) and trying to communicate with it. It seems that Z38XX and gpscon work ok at first, then looses connection in about 30min.(error receiver timeout) If I reestablish connection, it works fine, but in another half an hour, it looses connection again.

[time-nuts] Z3815A comm timeout

Hi, I got my hands on a Z3815A(with hockey puck) and trying to communicate with it. It seems that Z38XX and gpscon work ok at first, then looses connection in about 30min.(error receiver timeout) If I reestablish connection, it works fine, but in another half an hour, it looses connection again.

[time-nuts] Z3815A comm timeout

Hi, I got my hands on a Z3815A(with hockey puck) and trying to communicate with it. It seems that Z38XX and gpscon work ok at first, then looses connection in about 30min.(error receiver timeout) If I reestablish connection, it works fine, but in another half an hour, it looses connection again.

Re: [time-nuts] Z3815A and Z38xx software

reverse engineered manual > from Murray was all I needed to get it going. It's been on pretty well > continuously for 3-4 years now and hasn't missed a beat > > Morris > >> Date: Sat, 22 Jan 2011 21:39:57 -0500 >> From: Bob Camp >> Subject: [time-nuts] Z3815

Re: [time-nuts] Z3815A and Z38xx software

lable. The reverse engineered manual from Murray was all I needed to get it going. It's been on pretty well continuously for 3-4 years now and hasn't missed a beat Morris > Date: Sat, 22 Jan 2011 21:39:57 -0500 > From: Bob Camp > Subject: [time-nuts] Z3815A and Z38xx softwa

[time-nuts] Z3815A and Z38xx software

Hi Is anybody else trying to run a Z3815A with the Z38xx software? I have one of the earlier units with a 1938 mounted in a very official looking HP box. Some of the status information looks "backwards". The antenna shows ok when it's not and ERROR when it is ok. There's always the possibility

Re: [time-nuts] Z3815A

l.com Sent: Friday, June 11, 2010 10:20 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Z3815A I have not seen any plots on the 260 or E1938A on this site, I have only been on for a year, how ever I have a "few" 10811s" that Corby Dawson ran for me all below 1 E-12 one as low as 4

[time-nuts] Z3815A

> Hi > > The 260's are better for  environmental  than a 10811, same / worse than a > 1938. The  "typical" 260 beats the "typical" 10811 or 1938 on short term / > medium  term stability. There are some 10811's and 1938's that will indeed >  beat some 260's for short term stability. > >  Bob ___

Re: [time-nuts] Z3815A

Hi Your 10811's are likely a result of someone going through a *lot* of 10811's to pick those out. I believe that the 260 part in the Z3815 is specified for a maximum ADEV of 1x10^-12 at one second. They show a part like that on their standard spec sheet. It's certainly quite possible to hit th

Re: [time-nuts] Z3815A

I have not seen any plots on the 260 or E1938A on this site, I have only been on for a year, how ever I have a "few" 10811s" that Corby Dawson ran for me all below 1 E-12 one as low as 4 E -13 in the 1 to 100 sec. range. My problem is that Corby's file size is 900K and I have not found a way

Re: [time-nuts] Z3815A

Thanks Bob. On 12 June 2010 01:24, Bob Camp wrote: > Hi > > The 260's are better for environmental than a 10811, same / worse than a > 1938. The "typical" 260 beats the "typical" 10811 or 1938 on short term / > medium term stability. There are some 10811's and 1938's that will indeed > beat som

Re: [time-nuts] Z3815A

Hi The 260's are better for environmental than a 10811, same / worse than a 1938. The "typical" 260 beats the "typical" 10811 or 1938 on short term / medium term stability. There are some 10811's and 1938's that will indeed beat some 260's for short term stability. Bob On Jun 11, 2010, at

Re: [time-nuts] Z3815A

On 11 June 2010 07:24, Murray Greenman wrote: > > If you have one of the earlier Z3815A units, you will find the superb HP > E1938A 10MHz reference oscillator inside. There were manufacturing > problems with these units, I understand, and later ones (like mine) have > a Milliren 260 series 5MHz D

[time-nuts] Z3815A

Magnus, The Agilent Z3815A is a very nice unit, and fairly easy to get going. The main problem is software, which we had to specially write, although some versions of Ulrich's Z38XX work with it quite well. (The problem is subtle differences in the SCPI syntax). Yes, the backplane carries all th

Re: [time-nuts] Z3815A

Murray, 2010/1/19 Murray Greenman : > There are at least 20 Z3815A units in ZL Amateur hands that I know of, > and many more in VK. They were 'rescued' by a friend in VK, and have > been distributed with firmware and manual that we've worked out for > them. As far as I can make out, they were not

Re: [time-nuts] Z3815A vs Z3816A [Z3805A]

Steve Rooke wrote: Hi John, 2010/1/18 John Allen : 2.it come with the 16 channels GPS module (made by furuno in japan ) I've tried in vein to find information about the Furuno GPS, even contacting the manufacturers directly :-( But My Z3805A come with Two 10mhz and Two 1PPS Two RS422.and

Re: [time-nuts] Z3815A

paul swed wrote: That makes a lot of sense for T1/E1 applications across a country. I know VK had put in an early extensive glass phone network. Wonder if these were for smaller offices? Well, providing T1/E1 output with SSM codes makes sense for a number of telecom equipments so it is a fairl

Re: [time-nuts] Z3815A

That makes a lot of sense for T1/E1 applications across a country. I know VK had put in an early extensive glass phone network. Wonder if these were for smaller offices? On Mon, Jan 18, 2010 at 12:32 PM, Murray Greenman wrote: > Steve, > > There are at least 20 Z3815A units in ZL Amateur hands t

[time-nuts] Z3815A

Steve, There are at least 20 Z3815A units in ZL Amateur hands that I know of, and many more in VK. They were 'rescued' by a friend in VK, and have been distributed with firmware and manual that we've worked out for them. As far as I can make out, they were not used in cellular systems here. Unlik

Re: [time-nuts] Z3815A vs Z3816A [Z3805A]

> It actually has two RS232 connections, one tat seems to function > similar to the Z3801A/Z3816A and another which I have no clue as to > what it does? Some GPS units have a second serial port. I think the idea was that you could feed them data similar to what they now get from WAAS. There

Re: [time-nuts] Z3815A vs Z3816A [Z3805A]

Hi John, 2010/1/18 John Allen : > 2.it come with the 16 channels GPS module (made by furuno  in japan ) But My Z3805A come with Two 10mhz and Two 1PPS Two RS422.and > base the information from Korea It actually has two RS232 connections, one tat seems to function similar to the Z3801A/Z3816A an

Re: [time-nuts] Z3815A vs Z3816A

Hi Murray, Do you know how the Z3805A fits into the scheme of things? 73 Steve Rooke - ZL3TUV & G8KVD 2010/1/18 Murray Greenman : > Alberto, > > The Z3815A is certainly less common - except down here in VK/ZL. I have > one, and can try to answer your questions. The oscillator used in the > Z3815

[time-nuts] Z3815A vs Z3816A

Alberto, The Z3815A is certainly less common - except down here in VK/ZL. I have one, and can try to answer your questions. The oscillator used in the Z3815A is generally the HP E1938A, although mine is a more recent Symmetricom version with a Milliren 260 OCXO adaptation. Power supply is 20 - 60V

[time-nuts] Z3815a

I recently aquired one of these units Z3815a and am searching for any software and/or manual that must be avaliable somewhere. Stu _ Looking to change your car this year? Find car news, reviews and more http://a.ninemsn.com.au/b.aspx

[time-nuts] Z3815A connectors

K1JOS >Message: 2 >Date: Tue, 23 Oct 2007 20:30:34 +1000 >From: "Morris Odell" <[EMAIL PROTECTED]> >Subject: [time-nuts] Z3815A connectors >To: >Message-ID: <[EMAIL PROTECTED]> >Content-Type: text/plain; format=flowed; charset="iso-8859-1";

[time-nuts] Z3815A connectors

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi all, Thanks to a friend's investigative skills, I have found the maker of the unusual coaxial connector block on the HP Z3815A GPSDO. See:

Re: [time-nuts] Z3815A - what? -who? -where?

Correction - sold to Telecom Solutions before they became Symmetricom. Rob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rob Kimberley Sent: 08 May 2007 08:58 To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nu

Re: [time-nuts] Z3815A - what? -who? -where?

May 2007 04:27 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A - what? -who? -where? > I was thinking that myself, but this connector has four rows, and the > VME only has three. (There's also P1 and P2). VXI is similar to VME. > Having ju

Re: [time-nuts] Z3815A - what? -who? -where?

> Gents, > > I first noticed the Z3815A in January 2004 on eBay. I captured some pictures > then. ... > Bill, K8CU Bill, That eBay unit was missing its E1938A OCXO; that's why it looks odd. For photos of a Z3815A with its mounted oscillator see: http://www.leapsecond.com/museum/z3815a/ For mor

Re: [time-nuts] Z3815A - what? -who? -where?

> I was thinking that myself, but this connector has four rows, and the > VME only has three. (There's also P1 and P2). VXI is similar to VME. > Having just worked on a project with VME cards, I know that those > connectors are quite expensive. These are similar but unique, so I > can't imagin

Re: [time-nuts] Z3815A - what? -who? -where?

ubject: Re: [time-nuts] Z3815A - what? -who? -where? This connector looks like a VME backplane connector. They cost a fortune. Didier KO4BB Bill Hawkins wrote: > The pictures show why the 3815 never became popular. > > Matching that monstrous connector would be a problem. > The project

Re: [time-nuts] Z3815A - what? -who? -where?

This connector looks like a VME backplane connector. They cost a fortune. Didier KO4BB Bill Hawkins wrote: > The pictures show why the 3815 never became popular. > > Matching that monstrous connector would be a problem. > The project is impractical without the matching card > file. > > And what i

Re: [time-nuts] Z3815A - what? -who? -where?

] [mailto:[EMAIL PROTECTED] On Behalf Of Bill Jones, K8CU Sent: Monday, May 07, 2007 8:19 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3815A - what? -who? -where? Gents, I first noticed the Z3815A in January 2004 on eBay. I captured some pictures then. Moments ago

Re: [time-nuts] Z3815A - what? -who? -where?

Murray Greenman wrote: > T&Fers, > > Further to Kit's post a week or two back, we've started to make some > ground regarding understanding and using these excellent little GPSDO > units. I have working DOS software, and they also work OK with SATSTAT. > I have also sussed the GPS module comms and w

Re: [time-nuts] Z3815A - what? -who? -where?

Gents, I first noticed the Z3815A in January 2004 on eBay. I captured some pictures then. Moments ago I posted them here: http://www.realhamradio.com/z3815/z3815.gif http://www.realhamradio.com/z3815/z3815-front.gif http://www.realhamradio.com/z3815/z3815-rear.gif Bill, K8CU ___

Re: [time-nuts] Z3815A - what? -who? -where?

I'm just silently following along. I have never heard of that model before you guys mentioned it. I too would like to see pictures. Jason > T&Fers, > > Further to Kit's post a week or two back, we've started to make some > ground regarding understanding and using these excellent little GPSDO > u

Re: [time-nuts] Z3815A - what? -who? -where?

Murray Greenman wrote: > T&Fers, > > Further to Kit's post a week or two back, we've started to make some > ground regarding understanding and using these excellent little GPSDO > units. I have working DOS software, and they also work OK with SATSTAT. > I have also sussed the GPS module comms and w

[time-nuts] Z3815A - what? -who? -where?

T&Fers, Further to Kit's post a week or two back, we've started to make some ground regarding understanding and using these excellent little GPSDO units. I have working DOS software, and they also work OK with SATSTAT. I have also sussed the GPS module comms and written a display application for t