GW
Gary Woods
Sat, Feb 1, 2020 4:41 PM
I can't seem to get Lady Heather to talk to it, though I don't get the
"no radio" message when the DB9 cable is plugged into the unit.
Contains:
Ublox LEA-ST-0-002 receiver
Oscilloquartz OCXO 8863-XS oscillator
The RS-232 interface is a MAX3232 chip.
I can see data sent when LH starts up on an RS-232 tester in the line;
next step perhaps to scope transmit data in/out on the MAX3232.
Does this box send anything on power up?
Any known "gotchas" with it?
Antenna seems good; no warning LED when it's connected, and after
warmup Sys Lock LED is on solid.
I'm mostly using the 10mHz output to clock an ancient kit-built Davis
counter for Ham radio stuff, so not anywhere near the levels of
time-nuttery I see here.
TIA,
I can't seem to get Lady Heather to talk to it, though I don't get the
"no radio" message when the DB9 cable is plugged into the unit.
Contains:
Ublox LEA-ST-0-002 receiver
Oscilloquartz OCXO 8863-XS oscillator
The RS-232 interface is a MAX3232 chip.
I can see data sent when LH starts up on an RS-232 tester in the line;
next step perhaps to scope transmit data in/out on the MAX3232.
Does this box send anything on power up?
Any known "gotchas" with it?
Antenna seems good; no warning LED when it's connected, and after
warmup Sys Lock LED is on solid.
I'm mostly using the 10mHz output to clock an ancient kit-built Davis
counter for Ham radio stuff, so not anywhere near the levels of
time-nuttery I see here.
TIA,
PM
Patrick Murphy
Sat, Feb 1, 2020 6:24 PM
Hmmm. I do not have any of that equipment, but I do know the RS232
interface pretty well. It may be that you need to cross over the
connections with RX and TX. Do you have a null modem type device handy?
This looks like a male-to-female adapter designed to be in the RS232
connection between your computer and device. There are a few designs, but
they basically cross over RX with TX, RTS with CTS, and DSR with DTR. All
of this is to simulate a modem style connection between devices. Here is a
Wikipedia link: https://en.wikipedia.org/wiki/Null_modem
Hope this helps.
R/
Pat Murphy (KG5YPQ)
On Sat, Feb 1, 2020 at 10:41 AM Gary Woods garygarlic@earthlink.net wrote:
I can't seem to get Lady Heather to talk to it, though I don't get the
"no radio" message when the DB9 cable is plugged into the unit.
Contains:
Ublox LEA-ST-0-002 receiver
Oscilloquartz OCXO 8863-XS oscillator
The RS-232 interface is a MAX3232 chip.
I can see data sent when LH starts up on an RS-232 tester in the line;
next step perhaps to scope transmit data in/out on the MAX3232.
Does this box send anything on power up?
Any known "gotchas" with it?
Antenna seems good; no warning LED when it's connected, and after
warmup Sys Lock LED is on solid.
I'm mostly using the 10mHz output to clock an ancient kit-built Davis
counter for Ham radio stuff, so not anywhere near the levels of
time-nuttery I see here.
TIA,
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.
Hmmm. I do not have any of that equipment, but I do know the RS232
interface pretty well. It may be that you need to cross over the
connections with RX and TX. Do you have a null modem type device handy?
This looks like a male-to-female adapter designed to be in the RS232
connection between your computer and device. There are a few designs, but
they basically cross over RX with TX, RTS with CTS, and DSR with DTR. All
of this is to simulate a modem style connection between devices. Here is a
Wikipedia link: https://en.wikipedia.org/wiki/Null_modem
Hope this helps.
R/
Pat Murphy (KG5YPQ)
On Sat, Feb 1, 2020 at 10:41 AM Gary Woods <garygarlic@earthlink.net> wrote:
> I can't seem to get Lady Heather to talk to it, though I don't get the
> "no radio" message when the DB9 cable is plugged into the unit.
> Contains:
> Ublox LEA-ST-0-002 receiver
> Oscilloquartz OCXO 8863-XS oscillator
> The RS-232 interface is a MAX3232 chip.
> I can see data sent when LH starts up on an RS-232 tester in the line;
> next step perhaps to scope transmit data in/out on the MAX3232.
>
> Does this box send anything on power up?
> Any known "gotchas" with it?
>
> Antenna seems good; no warning LED when it's connected, and after
> warmup Sys Lock LED is on solid.
> I'm mostly using the 10mHz output to clock an ancient kit-built Davis
> counter for Ham radio stuff, so not anywhere near the levels of
> time-nuttery I see here.
>
> TIA,
>
> _______________________________________________
> time-nuts mailing list -- time-nuts@lists.febo.com
> To unsubscribe, go to
> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> and follow the instructions there.
>
GW
Gary Woods
Sat, Feb 1, 2020 10:18 PM
On Sat, 1 Feb 2020 12:24:24 -0600, you wrote:
Hmmm. I do not have any of that equipment, but I do know the RS232
interface pretty well. It may be that you need to cross over the
connections with RX and TX. Do you have a null modem type device handy?
The GPSDO says it only needs send and receive data; no handshake. I've
got a break-out adapter in the line passing only those and ground.
Reversing t/r doesn't help.
Gonna scope the interface chip's ins/outs, but right now the cellar
hamshack/shop/man cave is just too (^&%* cold!
On Sat, 1 Feb 2020 12:24:24 -0600, you wrote:
>Hmmm. I do not have any of that equipment, but I do know the RS232
>interface pretty well. It may be that you need to cross over the
>connections with RX and TX. Do you have a null modem type device handy?
The GPSDO says it only needs send and receive data; no handshake. I've
got a break-out adapter in the line passing only those and ground.
Reversing t/r doesn't help.
Gonna scope the interface chip's ins/outs, but right now the cellar
hamshack/shop/man cave is just too (*^&*%* cold!
D
djl
Sat, Feb 1, 2020 10:53 PM
Are they both "real" RS-232, both 5v ttl rs232, or hopelessly mixed?
On 2020-02-01 15:18, Gary Woods wrote:
On Sat, 1 Feb 2020 12:24:24 -0600, you wrote:
Hmmm. I do not have any of that equipment, but I do know the RS232
interface pretty well. It may be that you need to cross over the
connections with RX and TX. Do you have a null modem type device
handy?
The GPSDO says it only needs send and receive data; no handshake. I've
got a break-out adapter in the line passing only those and ground.
Reversing t/r doesn't help.
Gonna scope the interface chip's ins/outs, but right now the cellar
hamshack/shop/man cave is just too (^&%* cold!
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.
--
Dr. Don Latham AJ7LL
PO Box 404, Frenchtown, MT, 59834
VOX: 406-626-4304
Are they both "real" RS-232, both 5v ttl rs232, or hopelessly mixed?
On 2020-02-01 15:18, Gary Woods wrote:
> On Sat, 1 Feb 2020 12:24:24 -0600, you wrote:
>
>> Hmmm. I do not have any of that equipment, but I do know the RS232
>> interface pretty well. It may be that you need to cross over the
>> connections with RX and TX. Do you have a null modem type device
>> handy?
> The GPSDO says it only needs send and receive data; no handshake. I've
> got a break-out adapter in the line passing only those and ground.
> Reversing t/r doesn't help.
> Gonna scope the interface chip's ins/outs, but right now the cellar
> hamshack/shop/man cave is just too (*^&*%* cold!
>
> _______________________________________________
> time-nuts mailing list -- time-nuts@lists.febo.com
> To unsubscribe, go to
> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> and follow the instructions there.
--
Dr. Don Latham AJ7LL
PO Box 404, Frenchtown, MT, 59834
VOX: 406-626-4304
GW
Gary Woods
Sat, Feb 1, 2020 11:01 PM
On Sat, 01 Feb 2020 15:53:45 -0700, you wrote:
Are they both "real" RS-232, both 5v ttl rs232, or hopelessly mixed?
Computer port and GPSDO both "real" RS-232.
On Sat, 01 Feb 2020 15:53:45 -0700, you wrote:
>Are they both "real" RS-232, both 5v ttl rs232, or hopelessly mixed?
Computer port and GPSDO both "real" RS-232.
PM
Patrick Murphy
Sun, Feb 2, 2020 9:10 PM
Well, that was the easiest answer. The issue can also be the interface
settings - baud rate, stop bits, and parity need to match on both sides of
the connection. I suggest you try using something like "putty" to monitor
the port on your PC side. This will allow you to see if there is any data
present at all. It will often display garbage if data is present but port
settings are wrong. It will allow you to play with different settings to
try and find the correct combination.
The greater challenge is if putty shows nothing or refuses to connect. That
can take you back to square one. You had mentioned having a scope to look
at the interface. Hopefully it has the ability to decode data and show what
is going on.
One last notion. Are you certain you have the correct device drivers for
your RS232 interface on the PC? Physical RS232 ports have well established
drivers. Drivers for USB based virtual RS232 ports can be dodgy depending
on the exact hardware you have.
-Pat (KG5YPQ)
On Sat, Feb 1, 2020 at 10:41 AM Gary Woods garygarlic@earthlink.net wrote:
I can't seem to get Lady Heather to talk to it, though I don't get the
"no radio" message when the DB9 cable is plugged into the unit.
Contains:
Ublox LEA-ST-0-002 receiver
Oscilloquartz OCXO 8863-XS oscillator
The RS-232 interface is a MAX3232 chip.
I can see data sent when LH starts up on an RS-232 tester in the line;
next step perhaps to scope transmit data in/out on the MAX3232.
Does this box send anything on power up?
Any known "gotchas" with it?
Antenna seems good; no warning LED when it's connected, and after
warmup Sys Lock LED is on solid.
I'm mostly using the 10mHz output to clock an ancient kit-built Davis
counter for Ham radio stuff, so not anywhere near the levels of
time-nuttery I see here.
TIA,
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.
Well, that was the easiest answer. The issue can also be the interface
settings - baud rate, stop bits, and parity need to match on both sides of
the connection. I suggest you try using something like "putty" to monitor
the port on your PC side. This will allow you to see if there is any data
present at all. It will often display garbage if data is present but port
settings are wrong. It will allow you to play with different settings to
try and find the correct combination.
The greater challenge is if putty shows nothing or refuses to connect. That
can take you back to square one. You had mentioned having a scope to look
at the interface. Hopefully it has the ability to decode data and show what
is going on.
One last notion. Are you certain you have the correct device drivers for
your RS232 interface on the PC? Physical RS232 ports have well established
drivers. Drivers for USB based virtual RS232 ports can be dodgy depending
on the exact hardware you have.
-Pat (KG5YPQ)
On Sat, Feb 1, 2020 at 10:41 AM Gary Woods <garygarlic@earthlink.net> wrote:
> I can't seem to get Lady Heather to talk to it, though I don't get the
> "no radio" message when the DB9 cable is plugged into the unit.
> Contains:
> Ublox LEA-ST-0-002 receiver
> Oscilloquartz OCXO 8863-XS oscillator
> The RS-232 interface is a MAX3232 chip.
> I can see data sent when LH starts up on an RS-232 tester in the line;
> next step perhaps to scope transmit data in/out on the MAX3232.
>
> Does this box send anything on power up?
> Any known "gotchas" with it?
>
> Antenna seems good; no warning LED when it's connected, and after
> warmup Sys Lock LED is on solid.
> I'm mostly using the 10mHz output to clock an ancient kit-built Davis
> counter for Ham radio stuff, so not anywhere near the levels of
> time-nuttery I see here.
>
> TIA,
>
> _______________________________________________
> time-nuts mailing list -- time-nuts@lists.febo.com
> To unsubscribe, go to
> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> and follow the instructions there.
>
GW
Gary Woods
Sun, Feb 9, 2020 4:14 PM
Once I found the datasheet for the RS-232 interface, I found the TX
data was checking in but not out, and the circuitry that makes -V in
the MAX3232 wasn't working.
Replaced it * and all is well; Lady Heather is giving me nice maps of
satellites passing by, and 2nsec excursions on a graph. So now my
ancient Davis counter has a really really good timebase and I can
tweak my ham rig to within a fraction of a cycle of right. Hardly a
"time nuts" level of accuracy, but good enough!
Thanks, all!
*Lengthy digresssion involving my Navy vocabulary omitted.
Once I found the datasheet for the RS-232 interface, I found the TX
data was checking in but not out, and the circuitry that makes -V in
the MAX3232 wasn't working.
Replaced it * and all is well; Lady Heather is giving me nice maps of
satellites passing by, and 2nsec excursions on a graph. So now my
ancient Davis counter has a really really good timebase and I can
tweak my ham rig to within a fraction of a cycle of right. Hardly a
"time nuts" level of accuracy, but good enough!
Thanks, all!
*Lengthy digresssion involving my Navy vocabulary omitted.
PM
Patrick Murphy
Mon, Feb 10, 2020 12:10 AM
Great news! And even better sleuthing. I'm just curious - what piece of kit
is the MAX3232 installed in? I'm trying to figure out is it is the DCE or
the DTE end.
Thanks!
-Pat (KG5YPQ)
On Sun, Feb 9, 2020 at 10:15 AM Gary Woods garygarlic@earthlink.net wrote:
Once I found the datasheet for the RS-232 interface, I found the TX
data was checking in but not out, and the circuitry that makes -V in
the MAX3232 wasn't working.
Replaced it * and all is well; Lady Heather is giving me nice maps of
satellites passing by, and 2nsec excursions on a graph. So now my
ancient Davis counter has a really really good timebase and I can
tweak my ham rig to within a fraction of a cycle of right. Hardly a
"time nuts" level of accuracy, but good enough!
Thanks, all!
*Lengthy digresssion involving my Navy vocabulary omitted.
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.
Great news! And even better sleuthing. I'm just curious - what piece of kit
is the MAX3232 installed in? I'm trying to figure out is it is the DCE or
the DTE end.
Thanks!
-Pat (KG5YPQ)
On Sun, Feb 9, 2020 at 10:15 AM Gary Woods <garygarlic@earthlink.net> wrote:
> Once I found the datasheet for the RS-232 interface, I found the TX
> data was checking in but not out, and the circuitry that makes -V in
> the MAX3232 wasn't working.
> Replaced it * and all is well; Lady Heather is giving me nice maps of
> satellites passing by, and 2nsec excursions on a graph. So now my
> ancient Davis counter has a really really good timebase and I can
> tweak my ham rig to within a fraction of a cycle of right. Hardly a
> "time nuts" level of accuracy, but good enough!
> Thanks, all!
>
> *Lengthy digresssion involving my Navy vocabulary omitted.
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts@lists.febo.com
> To unsubscribe, go to
> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> and follow the instructions there.
>
GW
Gary Woods
Mon, Feb 10, 2020 3:00 PM
On Sun, 9 Feb 2020 18:10:36 -0600, you wrote:
I'm just curious - what piece of kit
is the MAX3232 installed in? I'm trying to figure out is it is the DCE or
the DTE end.
It's a Chinese BG7TBL GPSDO, using UBlox gps module and oscilloquartz
OCXO. DCE, with 9-pin serial connector and no handshake. Now talks
to either the UBlox monitor program or Lady Heather. Internal stuff
like DAC correction voltage not accessible but as I said, plenty good
enough for what I need.
On Sun, 9 Feb 2020 18:10:36 -0600, you wrote:
>I'm just curious - what piece of kit
>is the MAX3232 installed in? I'm trying to figure out is it is the DCE or
>the DTE end.
It's a Chinese BG7TBL GPSDO, using UBlox gps module and oscilloquartz
OCXO. DCE, with 9-pin serial connector and no handshake. Now talks
to either the UBlox monitor program or Lady Heather. Internal stuff
like DAC correction voltage not accessible but as I said, plenty good
enough for what I need.
