[time-nuts] Nortel Trimble thunderbolt

[Ed Palmer]

I always cursed when I tried to figure out how to wire an RS232 cable 
until I realized that transmit had a voltage on it while receive was 
close to zero volts.  So now I just remember that volts on one end 
connects to no volts on the other end.  Works every time and I don't 
have to think about straight or cross-over.

Ed

On 7/5/2013 6:37 PM, Mark C. Stephens wrote:
> Get a Serial LED breakout box and make sure both TX/RX are lit.
> If just one or the other make a pin2/3 X-over cable.
> No other pins are needed except for pin 5. (Signal GND)
>
> -marki
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Jim Sanford
> Sent: Saturday, 6 July 2013 5:56 AM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] Nortel Trimble thunderbolt
>
> All:
>
> I have my new Nortel unit powered up.  I have been unsuccessful at getting it to communicate with Lady Heather.
>
> I have tried both 19K2, 7, O 1 and 9K6, 8, N, 1 on the serial port to no avail.
> I tried the command line switch to wake up Nortel units wit both sets of serial parameters, to no avail.
>
> The instance of Lady Heather which goes out to KE5FX site works, so I presume I have a correct installation of Lady Heather.
>
> The Nortel appears to go through normal power up display on power up.
> Then it lights the yellow "no communication" LED.  Once I hooked up an antenna, within a few minutes, the green LOCK LED came on.  It appears that the Nortel is working.
>
> Is there something I'm missing about making these two play nicely together??
>
> Thanks & 73,
> Jim
> wb4gcs at amsat.org