[time-nuts] Help with BG7TBL 2015-07-08 GPSDO

[Patrick Murphy]

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 at 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 at lists.febo.com
> To unsubscribe, go to
> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> and follow the instructions there.
>