At 07:55 PM 6/9/2003 -1000, you wrote:
Well..............
This thing has been up and running now for a few hours!
Solution:
Just forget all that 422 to 232 interface stuff, and all the
rest! Simply connect as follows:
On the PC end, the RS232 connector, which is almost
certainly DB9; and to the RS422 DB25F connector
on the hp GPS unit connect directly these wires:
PC com port DB9, pin 2 (Rx) direct to hp DB25F pin 2 (Tx)
PC com port DB9, pin 3 (Tx) direct to hp DB25F pin 3 (Rx)
PC com port DB9, pin 5 (sig gnd) direct to hp DB25F pin 7(gnd)
That's it! Worked great for me, immediately after setting up.
That's exactly the configuration I went through, except that I
did the 422 to 232 conversion first. Too bad I had to learn from
you that all that effort was unnecessary... but glad you're up
and going! :-)
That is what Bill Jones, K8CU, calls this, PC to hp GPS
hook up, his "blow out" connection! Forget all the differential
and differing level stuff. Just do it. Harms nothing, and
most important, it worked!
See his web site:
http://www.realhamradio.com/GPS_Frequency_Standard.htm
Anyone want a Telebyte Model 260 422 to 232 Interface
converter!
Return it and get your C-note back. Or sell it on E-bay...
or the next hamfest...
At the moment, my unit is "locked" onto six GPS satellites,
and is providing high precision location, altitude and time
signals.....hoo, haw!
Now, in the morning, to connect the precise 10 MHz signal
into my RX-340.
That's the easy part. just connect a cable from the clock out
to the ext. ref in on the '340. nothing else needs to be done.
You can even use an el-cheapo radio shack cable for that!
(I didn't, because I figured that RS cable would be radiating
10 MHz RF around the shack, but that's just my cynical side
talking...)
73, Jim KH7M
--
Eric F. Richards
efricha@dimensional.com
"The weird part is that I can feel productive even when I'm doomed."
- Dilbert
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