[time-nuts] Newbie With a Z3801 Problem
n2lym
n2lym at optonline.net
Sat Nov 5 01:02:56 UTC 2016
Have you tried a loop back connection, short pins 2 and 3 and a terminal
program? You may have to disable hardware handshaking in hardware
manager for that USB device or possibly a baud rate problem.
Mike
On Fri, Nov 04, 2016 at 08:23 PM, Dave Hallidy wrote:
> Hal-
> I took your suggestion and sure enough, I can see on the scope that it
> puts
> out a string on power up. I'm sure that's why SatStat gives me a
> "Communications established- please wait" then "Checking echo". But
> then it
> all seems to fall apart, because after that, it drops back to "Trying
> to
> establish communications" and "No response..." until I power down then
> back
> up, and it repeats the cycle.
>
> I don't have any real info on power supply voltages, so I don't know
> what
> they should be. On power up, it goes through the cycle of briefly
> lighting
> the LEDs on the main board red, ending with the green blinking one on
> the
> main board at the same time cycling through the front panel LEDs and
> ending
> with just the power LED lit. I can pull it apart and check for caps
> needing
> replacement if you think that might be a cause of this.
>
> Dave
>
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Hal
> Murray
> Sent: Friday, November 04, 2016 6:56 PM
> To: Discussion of precise time and frequency measurement
> Cc: hmurray at megapathdsl.net
> Subject: Re: [time-nuts] Newbie With a Z3801 Problem
>
> I would put a scope on the TX line from the Z3801A and power cycle it.
> I'm pretty sure it prints out the version string on power up.
>
> Have you checked the power supplies? Or looked for old electrolytics?
>
>
> --
> These are my opinions. I hate spam.
>
>
>
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