All:
I purchased and am about to hook up the Nortel device.
Someone on this list expressed an interest in my old Z3801, but I lost
the email. If still interested, please contact me off list.
Thanks & 73,
Jim
wb4...@amsat.org
On 6/28/2013 9:45 AM, Jim Sanford wrote:
All:
My Z3801 no longe
To answer the question of whether the Nortel/Trimble
units will work with Lady Heather, here is a photo of
my modified NTPB15AA with the T-bolt monitor built-in.
This version I bought from RDR-electronics works fine.
http://i906.photobucket.com/albums/ac262/rjb1998/NTPB15AA05.jpg
-Arthur
___
Hi
On Jun 28, 2013, at 9:45 AM, Jim Sanford wrote:
> All:
>
> My Z3801 no longer works, and I've not been able to get any new ideas on it,
> so am looking for a replacement.
>
> I've come across a nice 10 MHz that has very good phase noise (-145db or so
> at 10 KHz offset), but costs $175 i
Tbolts been good for my uses. Nice and simple no muss or fuss.
I think I paid $139.
Regards
Paul.
On Fri, Jun 28, 2013 at 11:45 AM, Bob Camp wrote:
> Hi
>
> Ok, so the 100 MHz cleanup oscillator hopefully will be about -130 dbc /
> Hz or better at 100 Hz offset. That would mean a -150 dbc / Hz
Hi
Ok, so the 100 MHz cleanup oscillator hopefully will be about -130 dbc / Hz or
better at 100 Hz offset. That would mean a -150 dbc / Hz OCXO is roughly a
tradeoff at 100 Hz. At 1KHz your cleanup oscillator should be around -150 to
-160. That would put the 10 MHz at -170 to -180 to be in the
How about using the 10811 from your broken Z3801A?
Adrian
Jim Sanford schrieb:
Bob:
Thanks.
You correctly anticipated that I will use this to lock a 100 MHz
Oscillator, and either multiply or lock from there. (I'm considering
a VCXO at 1GHz as well, it would either be locked to 100 MHz or 10
Bob:
Thanks.
You correctly anticipated that I will use this to lock a 100 MHz
Oscillator, and either multiply or lock from there. (I'm considering a
VCXO at 1GHz as well, it would either be locked to 100 MHz or 10 Mhz.
Haven't decided yet, also considering multiplying up to 1000 and then
fro
Hi
On Jun 28, 2013, at 9:45 AM, Jim Sanford wrote:
> All:
>
> My Z3801 no longer works, and I've not been able to get any new ideas on it,
> so am looking for a replacement.
>
> I've come across a nice 10 MHz that has very good phase noise (-145db or so
> at 10 KHz offset), but costs $175 i
All:
My Z3801 no longer works, and I've not been able to get any new ideas on
it, so am looking for a replacement.
I've come across a nice 10 MHz that has very good phase noise (-145db or
so at 10 KHz offset), but costs $175 in single quantities (digi-key, I
think.) I was considering using
>>> The GPS receiver in my Z3801 has died and I need to replace it.
>> Go to ebay and type "oncore" in the search box. There are MANY available
>> starting at just about $20.
>Search for "oncore vp" (which is what a z3801a needs), and you won't
>find ANY, at any price.
On Ebay rdr-electronics
Dan Kemppainen wrote:
On 9/17/2012 6:03 PM, time-nuts-requ...@febo.com wrote:
OK, you can test a VP Oncore GPS receiver alone if you have a mean to
translate the TTL serial port to a regular RS232 for the PC. This
can be done with a MAX232 chip (or equivalent). Then the pinout
(refer to the
FY
ailto:time-nuts-boun...@febo.com] On
Behalf Of Don Latham
Sent: Tuesday, September 18, 2012 11:35 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Z3801 Replacement GPS Receiver Card
TTL to USB serial adapters on ebay for very reasonable.
Don
Dan Kemppainen
>
&
TTL to USB serial adapters on ebay for very reasonable.
Don
Dan Kemppainen
>
> On 9/17/2012 6:03 PM, time-nuts-requ...@febo.com wrote:
>> OK, you can test a VP Oncore GPS receiver alone if you have a mean to
>> translate the TTL serial port to a regular RS232 for the PC. This can
>> be
>> done wit
On 9/17/2012 6:03 PM, time-nuts-requ...@febo.com wrote:
OK, you can test a VP Oncore GPS receiver alone if you have a mean to
translate the TTL serial port to a regular RS232 for the PC. This can be
done with a MAX232 chip (or equivalent). Then the pinout (refer to the
FYI, I've had really goo
Art Sepin
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Azelio Boriani
Sent: Monday, September 17, 2012 3:01 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Z3801 Replacement GPS Receiver Card
On 9/17/12 3:34 PM, Chris Albertson wrote:
$20 is to much. I pay about $4 shipping included for the DB9 with the
Max chip attached. So you basically just attach 5V TTL to the back
of the connector.
That works. if you have 5V handy.. The USB to ttl serial is handy when
you don't necessarily
Or use transistors. You can translate the serial levels this way too, look
at this as an example: http://www.kmitl.ac.th/~kswichit/ap275/ap275.htm
On Tue, Sep 18, 2012 at 12:36 AM, Azelio Boriani
wrote:
> Yes, and you can even try an USB to serial adapter but with the TTL
> output. You can try wi
Yes, and you can even try an USB to serial adapter but with the TTL output.
You can try with a simple inverter (74HC04, 74HC14 but use a resistor in
series between the PC output and the inverter input) as some PC accept the
0-5V levels.
On Tue, Sep 18, 2012 at 12:22 AM, Jim Lux wrote:
> On 9/17/
$20 is to much. I pay about $4 shipping included for the DB9 with the
Max chip attached. So you basically just attach 5V TTL to the back
of the connector. Lots of people sell these. See ebay #180688345029
for an example. These work well for the Oncore GPS because both use
0.1 inch male heade
On 9/17/12 3:00 PM, Azelio Boriani wrote:
OK, you can test a VP Oncore GPS receiver alone if you have a mean to
translate the TTL serial port to a regular RS232 for the PC. This can be
done with a MAX232 chip (or equivalent).
There are a ton of these (serial TTL ports) available inexpensively f
essage.
> The full VP Oncore Command/Reply message set is available here:
>
> http://www.synergy-gps.com/images/stories/guides/vpcommands.pdf
>
> Art Sepin
>
>
>
>
> From: time-nuts-boun...@febo.com on behalf of Hui Zhang
> Sent: Sun 9/16
ge set is available here:
http://www.synergy-gps.com/images/stories/guides/vpcommands.pdf
Art Sepin
From: time-nuts-boun...@febo.com on behalf of Hui Zhang
Sent: Sun 9/16/2012 6:38 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [
On Sat, Sep 15, 2012 at 7:04 PM, paul swed wrote:
> As Bob mentions there may be more to it then just nailing that particular
> command.
> But worth taking a look after I deal with the wwvb psk issue. As far as the
> 5 to 3 V I would just use a 3 term reg like the cherry semi chip. But there
> are
Le 16/09/2012 15:38, Hui Zhang a écrit :
I just bought a second-hand Z3801A, it also had a error message when self test
- GPS Rcv error, and I saw a red LED on main board on. I want test it alone but
I don't know GPS board's pin define, can someone tell me? Thanks.
--
Les chiens aboient, et
HI
This is a pretty good start:
http://www.febo.com/pages/hardware/VPCommands.pdf
http://gpsd.berlios.de/vendor-docs/motorola/toc.pdf
There are lots of other references out there.
Bob
On Sep 16, 2012, at 9:38 AM, "Hui Zhang" wrote:
> I just bought a second-hand Z3801A, it also had a error m
Hi
It's probably easier to just make up an emulator for the UT rather than doing
it on a string by string basis. Only one of the strings needs to synch up with
the PPS. The rest can all be generated as needed. I'm not saying it would be
easy, only easier.
Maybe put something like an LEA-6T an
I just bought a second-hand Z3801A, it also had a error message when self test
- GPS Rcv error, and I saw a red LED on main board on. I want test it alone but
I don't know GPS board's pin define, can someone tell me? Thanks.
Hui
At 2012-09-16 21:20:26,"Azelio Boriani" wrote:
>Anyway, are you
Anyway, are you sure that the GPS unit is faulty? Can you test it alone?
The unit is responsive on the serial port? Is the Z3801A sending commands?
Can you verify with a 'scope on the serial line if there is any signal?
On Sun, Sep 16, 2012 at 2:54 PM, Mike S wrote:
> On 9/15/2012 2:11 PM, paul
On 9/15/2012 2:11 PM, paul swed wrote:
Then respond back with whatever the response might be and then simply pass
through in both direction whatever comes next.
Could an updated rcvr be used.
Is this init command really the only gotcha?
It's more than just the init command. The z3801a also send
> The could be a pretty huge upgrade. Enough maybe to just replacing working
> GPS cards. The newer Oncores have 10X or more better performance. You uP
> would have to introduce a small delay but not much if it is just passthrough
> data. ...
Has anybody looked at the software inside the Z380
As Bob mentions there may be more to it then just nailing that particular
command.
But worth taking a look after I deal with the wwvb psk issue. As far as the
5 to 3 V I would just use a 3 term reg like the cherry semi chip. But there
are plenty of alternates. It will take 5 in and give 3.3 out at
On Sat, Sep 15, 2012 at 11:11 AM, paul swed wrote:
> I also have a z3801 so perhaps I will face the same issue at some point.
> The question I have is the following.
> If a uproc is inserted between the rcvr and the chassis to intercept the
> init command.
> Then respond back with whatever the res
Hi
The only way to find out is to actually do it. Right now the init string keeps
you from "seeing" any further into the process.
Bob
On Sep 15, 2012, at 2:11 PM, paul swed wrote:
> I also have a z3801 so perhaps I will face the same issue at some point.
> The question I have is the following
I also have a z3801 so perhaps I will face the same issue at some point.
The question I have is the following.
If a uproc is inserted between the rcvr and the chassis to intercept the
init command.
Then respond back with whatever the response might be and then simply pass
through in both direction
Are you sure that the GPS unit is defective? Can you test it alone?
On Thu, Sep 13, 2012 at 10:44 PM, Mike S wrote:
> On 9/13/2012 2:00 PM, Chris Albertson wrote:
>
>> On Thu, Sep 13, 2012 at 10:53 AM, Mike S wrote:
>>
>>> Search for "oncore vp" (which is what a z3801a needs), and you won't fin
On 9/13/2012 2:00 PM, Chris Albertson wrote:
On Thu, Sep 13, 2012 at 10:53 AM, Mike S wrote:
Search for "oncore vp" (which is what a z3801a needs), and you won't find
ANY, at any price.
Really? It can't use the newer UT? I thought the UT is identical except
for better performance.
Yes, re
I found an online comment some while ago that suggested non of the later
receivers would work, again it's something I haven't tried but I suspect the
message formats are incompatible.
Following my earlier post it would seem that an 8 channel VP should indeed
be ok if configured to be in 6 c
On Thu, Sep 13, 2012 at 10:53 AM, Mike S wrote:
> On 9/13/2012 1:39 PM, Chris Albertson wrote:
>
>> On Thu, Sep 13, 2012 at 10:22 AM, wrote:
>>
>>>
>>> The GPS receiver in my Z3801 has died and I need to replace it.
>>>
>> Go to ebay and type "oncore" in the search box. There are MANY availabl
On 9/13/2012 1:39 PM, Chris Albertson wrote:
On Thu, Sep 13, 2012 at 10:22 AM, wrote:
The GPS receiver in my Z3801 has died and I need to replace it.
Go to ebay and type "oncore" in the search box. There are MANY available
starting at just about $20.
Search for "oncore vp" (which is what
On Thu, Sep 13, 2012 at 10:22 AM, wrote:
>
> The GPS receiver in my Z3801 has died and I need to replace it.
>
> I know the one inside the Z3801 is a 6 channel Oncore. But these are hard
> to locate.
>
>
Go to ebay and type "oncore" in the search box. There are MANY available
starting at just
Hi Doug
I have seen comments that the later 8 channel Oncore should work ok, some
of those you'll probably find in the list archives.
I've also seen it claimed that the 8 channel Oncore needs to be configured
in 6 channel compatibility mode in order to work in the Z3801A but other
comment
Hi,
The GPS receiver in my Z3801 has died and I need to replace it.
I know the one inside the Z3801 is a 6 channel Oncore. But these are hard to
locate.
Could anyone recomend a source of suitable replacement cards. be it 6 or 12
channel, the main thing is it works
thanks
Doug
G4DZU
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