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 has a
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
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 with a
-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
On 9/17/2012 6
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
://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: [time-nuts] Z3801 Replacement GPS Receiver
Replacement GPS Receiver Card
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
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
$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
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
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
azelio.bori...@screen.itwrote:
Yes, and you can even try an USB to serial adapter but with the TTL
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
-
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
OK, you can test a VP Oncore GPS receiver
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
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 mi...@flatsurface.com wrote:
On
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 azelio.bori...@screen.it
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
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 ba...@163.com wrote:
I just bought a second-hand Z3801A, it also
On Sat, Sep 15, 2012 at 7:04 PM, paul swed paulsw...@gmail.com 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.
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
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 paulsw...@gmail.com wrote:
I also have a z3801 so perhaps I will face the same issue at some point.
The question I have
On Sat, Sep 15, 2012 at 11:11 AM, paul swed paulsw...@gmail.com 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
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
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 Z3801A?
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
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
On Thu, Sep 13, 2012 at 10:22 AM, gandal...@aol.com 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
On 9/13/2012 1:39 PM, Chris Albertson wrote:
On Thu, Sep 13, 2012 at 10:22 AM, gandal...@aol.com 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
On Thu, Sep 13, 2012 at 10:53 AM, Mike S mi...@flatsurface.com wrote:
On 9/13/2012 1:39 PM, Chris Albertson wrote:
On Thu, Sep 13, 2012 at 10:22 AM, gandal...@aol.com 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.
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
On 9/13/2012 2:00 PM, Chris Albertson wrote:
On Thu, Sep 13, 2012 at 10:53 AM, Mike S mi...@flatsurface.com 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
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 mi...@flatsurface.com wrote:
On 9/13/2012 2:00 PM, Chris Albertson wrote:
On Thu, Sep 13, 2012 at 10:53 AM, Mike S mi...@flatsurface.com wrote:
Search for oncore vp (which is what a
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