[time-nuts] Newbie With a Z3801 Problem

n2lym n2lym at optonline.net
Fri Nov 4 21:02:56 EDT 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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