Hi
Looking at the 58503 auctions on eBay, I think that a number of them are simply
Z3801’s out of cell tower scrap operations that have had the 58503 front panel
bits and pieces added to them. Some of the cases have a fairly odd look to them.
Bob
> On Nov 17, 2014, at 7:48 PM, Charles Steinmet
One of my Z3805's (with the double oven 10811 ocxo iirc) also performs
similarly at times to the 58503A mentioned by Said. From an adev perspective
it's close to my BVA at some tau's (around a hundred seconds or so iirc.) At
times though the output seems to "jump" in frequency. My other Z38
Bob wrote:
The 58503 is a Z3801 with a pretty instrument style package put
around it - right?
If so, it might / should have a 10811 in it rather than an MTI OCXO.
I think there may be other minor differences between the 58503 and
the Z3801, including a newer GPS engine, but I'm not positiv
Hi
> On Nov 17, 2014, at 7:48 PM, Charles Steinmetz wrote:
>
> Bob wrote:
>
>> The 58503 is a Z3801 with a pretty instrument style package put around it -
>> right?
>>
>> If so, it might / should have a 10811 in it rather than an MTI OCXO.
>
> I think there may be other minor differences be
Correct on all counts Bob.
My two 58503A units from China are great for both ADEV and PN measurements,
better than anything else I have as a combo (I have Wenzel ULNs for even lower
PN testing but they don't have any usable ADEV). I also have a costly BVA and
it can't compete against the HP un
ime-nuts"
>
> To: ;
> Sent: Monday, November 17, 2014 2:26 PM
> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
> Z3810A,Z3811A, Z3812...
>
>
> Hi Bob,
>
> yes, the 10MHz plot is rotten, no doubt. The 15MHz plot is quite good till
> about 40H
That first spike falls right at 60 Hz. I wonder if your test setup is
picking up some hum?
Tom
- Original Message -
From: "S. Jackson via time-nuts"
To: ;
Sent: Monday, November 17, 2014 2:26 PM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
Z3810A,Z38
Hi
The 58503 is a Z3801 with a pretty instrument style package put around it -
right?
If so, it might / should have a 10811 in it rather than an MTI OCXO. The 10811
is rated for -155 dbc at 100 Hz. That is much better than the noise floor that
the MTI’s seem to produce at 100 Hz. About the on
Hi Bob,
yes, the 10MHz plot is rotten, no doubt. The 15MHz plot is quite good till
about 40Hz offset, then it becomes pretty rotten too.
Here is one of my 58503A units (using the 10811 OCXO) as a comparison..
measured against our DROR-IIA (this plot was actually done to show the
DROR-IIA
Hi
Also missing on both the Ref-1 and Ref-0 in the same vicinity (only on the
back):
U20 (might be U2?0)
R212
U205
Also of note:
U207 (alarm opto isolator) is present on Ref-0 and missing on Ref-1.
Bob
> On Nov 5, 2014, at 6:29 PM, Arthur Dent wrote:
>
> Could someone who has both the REF
Hi
Does your board have a chip at U4?
The “normal” boards have U1 but no U4. There may have been two different DAC’s
for these boards.
Bob
> On Nov 5, 2014, at 6:29 PM, Arthur Dent wrote:
>
> Could someone who has both the REF 0 and REF 1 units check
> to see if the REF 0 unit has U1 missing
Hi
A little more snooping and U18 pops out. It’s an Atmel AT28C64B. Since it is a
64K bit EEPROM, that’s a much more likely place to stuff config items than
redoing a flash chip. 64K seems pretty big for simple config variables and it’s
a parallel EEPROM rather than a serial part. They may actu
Hi
There is what could be a programming header on my units. It’s next to the U34
firmware chip. Oddly it does not seem to have a designator on it. There is a
similar 10 pin header over by the other firmware chip. That one is not stuffed
on my board Ref-0. It’s labeled J101. I *know* what J101 i
Hi
The ADC and the active filter next to it are present on my Ref 0 and Ref 1. I
suspect that the active filter is there to allow them to dither the DAC without
creating monster spurs.
Bob
> On Nov 5, 2014, at 6:29 PM, Arthur Dent wrote:
>
> Could someone who has both the REF 0 and REF 1 un
Hi Arthur,
Yes, it's there on mine. It's hard to think it would be able to control the
OCXO without it.
Bob
From: Arthur Dent
To: time-nuts@febo.com
Sent: Wednesday, November 5, 2014 5:29 PM
Subject: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z381
Could someone who has both the REF 0 and REF 1 units check
to see if the REF 0 unit has U1 missing. U1 is an AD7849
serial input, 14-Bit/16-Bit DAC on my REF 1 units but is
missing on an old REF 0 I just dug out of the to-do pile.
Someone may have already mentioned this and I missed it.
-Arthur
h
Hi Bob,
Thanks for the information, I've still just been working from the J8
Diagnostic port and it's about time I took a look at the RS422 output.
The "proper" Ref-1 seems to be working as I'd expect, it's accepting a
valid Ref-0 is present and going into standby as a result. Pulling out
Hi
On a “real” Ref-0 / Ref-1 combo, the Lucent status message (RS-422 / PPS port)
shows which device the string is coming from. This is independent of their
status bits. Previous digging into similar units shows the same thing on
earlier Lucent GPSDO’s. All the details are buried (200 posts bac
PS, re two Ref-1 units linked
I forgot to mention that unlike Stewart's comment re a normal pair below,
my Ref-1 continues to show "GPS 1PPS Valid"
It would seem there's some of the handshaking working ok but not much
actual activity being shared, will have a further poke about later.
R
For what it's worth, here's what happened when I linked two Ref-1 units
together
One was fitted with it's GPS module as normal, I'll call this Ref-1.
The other was as normal other than having it's GPS module removed, I'll
call this Ref-1-0.
The link cable was around 15 inches long and wir
Verrry nice Stu, thank you, having both units obviously does have its
advantages after all:-)
Pin 3 certainly controls the standby indication on the Z3811A and it's
comforting to know it is indeed a solid ground during normal operation.
However, given the low logic level seen on pin 2 I'm
; To: "Discussion of precise time and frequency measurement"
>
> Sent: Monday, November 03, 2014 2:23 PM
> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
> Z3810A,Z3811A, Z3812...
>
>
>> The photos I posted at http://goo.gl/87e8GG show the differen
nt: Monday, November 03, 2014 2:23 PM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
Z3810A,Z3811A, Z3812...
The photos I posted at http://goo.gl/87e8GG show the differences between
the two boards - there is more to it than just adding a GPS board. The
underside has a
r.
>
> Anthony
>
> -Original Message-
> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of GandalfG8---
> via time-nuts
> Sent: Monday, November 03, 2014 12:00 PM
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
-boun...@febo.com] On Behalf Of GandalfG8---
via time-nuts
Sent: Monday, November 03, 2014 12:00 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
Hi Arthur
Thanks for your further comments, and certainly no need for the "
Hi
> On Nov 3, 2014, at 12:00 PM, Arthur Dent wrote:
>
> GandalfG8 at aol.com GandalfG8 at aol.com Sun Nov 2 09:08:30 EST 2014 wrote:
>
> "Ooh err, whoops, and oh dear !!
>
> Arthur, I've only just had a chance to look at your latest photos, and
> unless I've really got my wires crossed, if y
Hi Arthur
Thanks for your further comments, and certainly no need for the "sorry".
It was your pioneering work that inspired recent efforts to start with,
and the confusion over the pin numbers that led Gotz to the, just grounding
pins 2 and 3, 2 link solution we have now.
Overall, I'd s
> It turns out this is what happens if you switch the "Output Level" from 17
> to 23, obviously an advisory indication to draw attention to the higher
> output. Switching it back reduces the level, as expected, and returns the
> LED function to normal. Phew:-)
> I can't remember switching it bu
GandalfG8 at aol.com GandalfG8 at aol.com Sun Nov 2 09:08:30 EST 2014 wrote:
"Ooh err, whoops, and oh dear !!
Arthur, I've only just had a chance to look at your latest photos, and
unless I've really got my wires crossed, if you'll pardon the
expression:-),
your links on J5 are not shown on pins
Z3811A "ON" LED flashing.problem solved!
If only it was always this easy:-)
It turns out this is what happens if you switch the "Output Level" from 17
to 23, obviously an advisory indication to draw attention to the higher
output.
Switching it back reduces the level, as expected, and re
Hi
Here’s another way to look at the data:
pin pin res res
Pairfromto fromto
A 1 9 oc/1k 10k
B 2 10 10K
Hi
Well here’s some data to think about:
Pin GPS box Slave box
1 o.c.1.1 K
2 10 K10 K
3 1.1 K 1.1 K
4 1.1
It would seem that the hunt for 1PPS will need to be attempted by someone
with two units coupled together.
I don't know if there's some sort of handshake enablement but with just the
Ref-1 unit I've not been able so far to find 1PPS on the Interface
connector, either during the boot up sequen
nal Message - From: "Bob Camp"
> To: ; "Discussion of precise time and frequency
> measurement"
> Sent: Sunday, November 02, 2014 3:49 PM
> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
> Z3810A,Z3811A, Z3812...
>
>
>> Hi
Hi
I bet (again the order of fries) that the ground on pin 13 that crosses to is
some sort of “other box plugged in” indicator.
So:
The 15 pin cable is:
PairEnd A End B
A 1 9
B 2 10
C
Thanks Gotz
2 and 3 grounded works fine for me too, although I still have one unit that
insists on flashing the ON light rather than bringing it on solid. In all
other respects both units seem to match. Two more should be arriving
sometime in the next couple of weeks so will see how they ma
- Original Message -
From: "Bob Camp"
To: ; "Discussion of precise time and frequency
measurement"
Sent: Sunday, November 02, 2014 3:49 PM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
Z3810A,Z3811A, Z3812...
Hi
The supplied cable is indeed v
Hi
After spending some quality time with Mr. Google, I dug out some of the old UT+
information. The little beast does indeed forget everything it ever knew once
you loose battery / super cap / whatever backup power. You can force a
position, but it’s not persistent once you loose RAM.
If these
Hi
The 15 pin cable is:
PairEnd A End B
A 1 9
B 2 10
C 3 11
D 4 12
E 5 13
F 6
If you are going to back up the clock with AA cells, use lithium primary AA
cells. They will last longer, plus they don't leak. EVERY alkaline cell will
eventually leak... they don't call 'em Alkaleaks for nuthin'
_
kb...@n1k.org said:
> The numbers quoted earlier (and they sound right) were 20 uA at 2.5V. That
> would be well under your 100uA. My *guess* is that self discharge / aging on
> a normal AA is going to limit things faster than a 20 uA drain.
20 uA would last 15 years. (assuming no self-dischar
Good conversation
I am accurate in what I am saying about the z3801. Its off most of the time
so it is drawing against the the AA batteries most of the time. One more
note my bad, they are AAAs.
Like Bob says most likely self discharge and such will get them first. No
matter they get changed next y
Hi
It’s those little onboard batteries that I have the experience with. After a
while, you are doing well to get a month out of them. Play for a bit longer and
they are down to a couple weeks. That’s not a surprising thing, the charging
circuit on some of this stuff is often less than perfect.
Ah, just found an Engineering Note in my files that again quotes 5uA at
2.5V but also quotes 100uA at 5.0V, perhaps not too relevant at 3.1V but
that's quite an increase.
The same document quotes the following specs for the optional onboard
lithium battery...
Voltage -- 3V
Capacity -- 15m
Hi
Good point. They could have GPS data simply to make the diag stuff happy, but
not use it for the disciplining side of things. I had not considered that
possibility.
Others have reported SatStat working on the slave, so there is at least *some*
data coming out that port.
Bob
> On Nov 2,
Hi
So then the question becomes - What is the real cutoff voltage?
Your pair of AA’s will start off at 3.1V, but they will get to 2.5 long before
they are truly dead. Is the RAM gone at 2.5000 or 2.4 or “about 2 volts” ….
Bob
> On Nov 2, 2014, at 3:54 PM, GandalfG8--- via time-nuts
> wrote:
Just another thought though, does the diagnostic port on the slave also
communicate with SatStat etc?
That would imply at least a transfer of serial data in one direction, even
if not for the control functions.
Regards
Nigel
GM8PZR
In a message dated 02/11/2014 20:49:49 GMT Standard T
Hi Bob
The UT+ data sheet from 1998 quotes an external backup supply of 2.5 to
5.35V with a drain of 5uA typical at 2.5 Volts.
Regards
Nigel
GM8PZR
In a message dated 02/11/2014 20:41:44 GMT Standard Time, kb...@n1k.org
writes:
Hi
The numbers quoted earlier (and they sound right) we
Hi
The supplied cable is indeed very short. It’s also quite stiff and a bit flakey
(intermittent). I would bet at least one cold order of fries that there is no
bi-directional serial between the two units. If there was, I doubt our little
pin shorting exercises would get things running.
If th
Hi
The numbers quoted earlier (and they sound right) were 20 uA at 2.5V. That
would be well under your 100uA. My *guess* is that self discharge / aging on a
normal AA is going to limit things faster than a 20 uA drain.
Now, if you have the more normal tiny coin cell involved with 1/10 or 1/10
Given the expected close proximity of these units, presumably it was only
ever intended that they should work as a pair, and I remember Stu Cobb
commenting on how short the supplied link cable is, I wouldn't be too surprised
if there turns out to be no serial comms between the units but perh
> By the way the z3801 is off most of the year so the drains quite small.
I think that's backwards. The battery is only used when there is no power to
the GPS module.
AAs are roughly 2800 mA hours. There are 8760 hours in a year. That's 319
microamp years. (How's that for a SI unit?) So th
Hi
Yes, getting the GPS version worked out is certainly the thing most people will
be after. Doing the other box is a bit further down the road. The main thing
(to me) is documenting the 15 pin connector as best we can. That way whatever
somebody decides to do in the future, they have a good st
l...@aol.com; Discussion of precise time and frequency measurement
>
> Sent: Sunday, November 2, 2014 1:41 PM
> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
> Z3811A, Z3812...
>
> Hi
>
> No, once we get the GPS end worked out, we need to
Ah, I had wondered about that but was probably being a bit selfish as I
only have the GPS based units:-)
Given the similarity, I would assume where we've got to on these wouldn't
be a bad starting point, and at least identifying the 1PPS input on the
interface connector should be straightfo
nt: Sunday, November 2, 2014 1:41 PM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
Hi
No, once we get the GPS end worked out, we need to do the same thing for the
non-GPS end. If we can fake it into working with just a PPS, it’s the perfect
thing
Hi
No, once we get the GPS end worked out, we need to do the same thing for the
non-GPS end. If we can fake it into working with just a PPS, it’s the perfect
thing to use to attach an OCXO to a newer GPS (like the Jackson Labs part …).
Bob
> On Nov 2, 2014, at 2:15 PM, GandalfG8--- via time-nu
Hi Gotz
That's great stuff, thank you, I'll try that later.
At this rate we'll soon be finding ways of doing this without any wiring
whatsoever, perhaps we could start with just standing it upside down in a
dark corner on the night of the full moon:-)
Regards
Nigel
GM8PZR
In a messa
Thanks to a fellow Time-Nut I order one of these yesterday. I had been
deleting the messages about some surplus widget. Should see it in a week so
will take advantage of every ones work to date. Thanks.
I did want to share an item with respect to batteries on the GPS engine.
I added 2 aa batteries
Hi
Here’s one other little tidbit. The original mod notes from Arthur on all this
show:
“ Pin 4: High = 2.4V, low = 0, Stop flashing = 1.35V”
That’s exactly what you would expect to see if you are driving one side of a
RS-422 differential receiver. If pair D is one side of an RS-422, then the
Am 02.11.2014 15:08, :
Ooh err, whoops, and oh dear !!
Arthur, I've only just had a chance to look at your latest photos, and
unless I've really got my wires crossed, if you'll pardon the expression:-),
your links on J5 are not shown on pins 2, 10, 12, and 15, but on pins 4, 6,
11, and 13.
>>>
>>> In a message dated 01/11/2014 22:41:09 GMT Standard Time, ar...@antamy.com
>>> writes:
>>>
>>> I wasn't clear from the photo whether the circuit was a representation of
>>> what is on the board, and you just had to connect the p
Sounds like
>> the latter?
>>
>> Anthony
>>
>> -Original Message-
>> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of
>> GandalfG8--- via time-nuts
>> Sent: Saturday, November 01, 2014 4:04 PM
>> To: time-nuts@febo.com
&g
Oh, ok, thanks for that, and thanks too for the further information on the
interface connector.
For now though, it's me back to sleep for a while:-)
Regards
Nigel
GM8PZR
In a message dated 02/11/2014 14:53:01 GMT Standard Time, kb...@n1k.org
writes:
Hi
Well I for one am not getting
Hi
Well I for one am not getting at all bored at seeing what you are doing. I find
it very encouraging that somebody is sharing all the ins and outs of figuring
out what’s going on. Far to often we simply get the end result and not much
detail (I for one have been rightly criticized for that wi
functionality are just the links.
>>>
>>> I'm leaving well alone for now to let the oscillator run overnight but
>
>>> will try it again tomorrow with just the links and see what happens.
>>> I'm also hoping to get some idea of the between uni
Oh well, and perhaps not too surprisingly, the J5 pin 3 to ground option on
its own was not that much of a raging success.
However, the unit did eventually come up indicating "Standby", and at that
point pulling out the pin 3 to ground link and inserting the previously
made up plug switched
Ooh err, whoops, and oh dear !!
Arthur, I've only just had a chance to look at your latest photos, and
unless I've really got my wires crossed, if you'll pardon the expression:-),
your links on J5 are not shown on pins 2, 10, 12, and 15, but on pins 4, 6,
11, and 13.
As far as I'm aware t
So that's it folks, after all this it would now seem that all that's
needed to enable a Ref-1 unit stand alone is to link together J5 pins 2, 10, 12,
and 15, and to ground pin 3 to pin 8, and then just hang around for hours
and hours on end with yer fingers crossed:-)
I don't know if it's pos
ated 01/11/2014 22:41:09 GMT Standard Time,
> ar...@antamy.com
>> writes:
>>
>> I wasn't clear from the photo whether the circuit was a
representation
> of
>> what is on the board, and you just had to connect the pins listed
> together,
>> o
1/2014 22:41:09 GMT Standard Time,
> ar...@antamy.com
>> writes:
>>
>> I wasn't clear from the photo whether the circuit was a
representation
> of
>> what is on the board, and you just had to connect the pins listed
> together,
>> or
Hi Arthur,
Thanks for the extra information, it sounds like you may well have answered
my question:-)
As I commented to Bob, I was hoping I might be able to find an option that
didn't require any internal access, I knew that was a long shot anyway but
I quite liked the idea of a plug and
t; I wasn't clear from the photo whether the circuit was a representation
> of
>> what is on the board, and you just had to connect the pins listed
> together,
>> or whether this was a new circuit that had to be inserted. Sounds like
>> the latter?
>>
>
the board, and you just had to connect the pins listed
together,
> or whether this was a new circuit that had to be inserted. Sounds like
> the latter?
>
> Anthony
>
> -Original Message-
> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf O
Keep in mind that I made the modifications to my RFTG-u REF 1 almost
4 years ago and the details of why I did what I did are kind of foggy
today. It was a pure hack but I *believe* that the circuitry as well
as the jumpers were required, or at least I thought so. The big problem
with getting someth
r,
> or whether this was a new circuit that had to be inserted. Sounds like
> the latter?
>
> Anthony
>
> -Original Message-
> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of
> GandalfG8--- via time-nuts
> Sent: Saturday, November 01, 2014 4:04
lfG8--- via time-nuts
Sent: Saturday, November 01, 2014 4:04 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
Well, I'm happy to report that Arthur's modification does do the trick,
although I don't know why as I
t; Sent: Saturday, November 01, 2014 4:04 PM
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
> Z3811A, Z3812...
>
> Well, I'm happy to report that Arthur's modification does do the trick,
> although I don't kno
-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of GandalfG8---
via time-nuts
Sent: Saturday, November 01, 2014 4:04 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
Well, I'm happy to report that Arthur's modification do
Well, I'm happy to report that Arthur's modification does do the trick,
although I don't know why as I don't have any data for the interface as yet.
I daren't disturb the 15 pin connector right now as this Z3811A PCB is
still out of its case and connected to a breadboard with wires just pushe
I've confirmed from the model number that the GPS module on these is indeed
an Oncore UT+.
There's a Synergy engineering note available regarding Oncore battery
backup, and one place a copy can be found is here...
http://f6fgz.free.fr/Fichiers/GPS/Backup_Battery_Considerations.pdf
If so d
4:11 PM
To: Bob Stewart; Discussion of precise time and frequency measurement
Cc: hmur...@megapathdsl.net
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
b...@evoria.net said:
> Thanks for more pics. Was there any indication of where the 10MHz
>
b...@evoria.net said:
> Thanks for more pics. Was there any indication of where the 10MHz gets its
> signal? Could you see a trace, or did I miss that in the pics? I'm a bit
> too ham-fisted to go prodding around in mine, so I've left it closed after
> an initial urge to see the top of the boar
bo.com] On Behalf Of Bob Stewart
Sent: Sunday, October 26, 2014 1:29 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
Hi Anthony,
Thanks for more pics. Was there any indication of where the 10MH
oard.
Bob
From: Anthony Roby
To: Discussion of precise time and frequency measurement
Sent: Sunday, October 26, 2014 12:30 PM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
I pulled both boards out of the cases and have uploaded some shots of the
: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A,
Z3812...
Anthony Roby aroby at antamy.com wrote:
"My curiosity got the better of me so I ordered these earlier this week and
received them today.
I've powered both up and quickly measured the 10MHz output. I don't
e connectors. Anyone
>> have a source for the latches for the D connectors?
>>
>> Tom
>>
>>
>>
>> - Original Message - From: "Anthony Roby"
>> To: "Discussion of precise time and frequency measurement"
>>
sage-
From: Bob Camp
Sent: Saturday, October 25, 2014 2:09 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
Z3810A,Z3811A, Z3812...
Hi
The days of published schematics started to draw to a close 15 or 20 years
ago
nnectors?
>
> Tom
>
>
>
> - Original Message - From: "Anthony Roby"
> To: "Discussion of precise time and frequency measurement"
>
> Sent: Thursday, October 23, 2014 10:39 PM
> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
> Z
Anthony Roby aroby at antamy.com wrote:
"My curiosity got the better of me so I ordered these earlier this week and
received them today.
I've powered both up and quickly measured the 10MHz output. I don't yet
have a GPS antenna feed
that I can connect, so couldn't check that out. And I need to
iscussion of precise time and frequency measurement
Sent: Thursday, October 23, 2014 11:27 PM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
I am surprised the schematics for these have not surfaced yet. Are they not
out of support now?
I got
nyone
have a source for the latches for the D connectors?
Tom
- Original Message -
From: "Anthony Roby"
To: "Discussion of precise time and frequency measurement"
Sent: Thursday, October 23, 2014 10:39 PM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Sy
via time-nuts
To: time-nuts@febo.com
Sent: Tuesday, October 21, 2014 5:59 AM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
It seems from the auction revision table that this seller has been
offering these for some time, so perhaps another "hid
"
To: "Discussion of precise time and frequency measurement"
Sent: Thursday, October 23, 2014 10:39 PM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
My curiosity got the better of me so I ordered these earlier this week and
received them t
bo.com] On Behalf Of Bob Stewart
Sent: Thursday, October 23, 2014 12:20 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
My units came in today. What I got appears to be new-in-box. It's prob
Sent: Tuesday, October 21, 2014 5:59 AM
> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
Z3810A, Z3811A, Z3812...
>
> It seems from the auction revision table that this seller has been
offering
> these for some time, so perhaps another "hidden"
n the road, someone will come up with the
mods to convert a REF-1 into a REF-0, and vice versa, unless the firmware
prevents that.
Bob
From: GandalfG8--- via time-nuts
To: time-nuts@febo.com
Sent: Tuesday, October 21, 2014 5:59 AM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z
ds to
convert a REF-1 into a REF-0, and vice versa, unless the firmware prevents that.
Bob
From: GandalfG8--- via time-nuts
To: time-nuts@febo.com
Sent: Tuesday, October 21, 2014 5:59 AM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
AM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
It seems from the auction revision table that this seller has been offering
these for some time, so perhaps another "hidden" gem:-), but it's perhaps
also worth noting that if this
Hi Arthur,
Thanks for the photo, I was just going to play it by ear but it's always
handy to have a starting point.
I did take a look back at June 2010 and eventually found your RFTG comments
under a discussion on the Z3815A, so might be why I didn't recall seeing
them previously, and tha
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