[time-nuts] Introduction & GPSDO Question

Bryan _ bpl521 at outlook.com
Thu Apr 19 21:13:48 EDT 2018

Hi Tom:

Does the unit have a serial port?. If so may want to try and connect it to your pc and use the Lady Heather GPSDO monitoring program. From what you describe by the LED's it is possible it has not locked, or still trying to perform a survey, or maybe a error. Usually a green solid LED somewhere indicates a lock.



From: time-nuts <time-nuts-bounces at febo.com> on behalf of Tom Koza <wb6fyr at gmail.com>
Sent: April 19, 2018 1:47 PM
To: time-nuts at febo.com
Subject: [time-nuts] Introduction & GPSDO Question

Hello Everyone,

My name is Tom and my amateur callsign is WB6FYR, I'm a newcomer to this

I'm mainly interested in creating a reasonable 10mHz standard for my
various pieces of test equipment here at home.  To that end I've purchased
and received an Ebay "Trimble Inside" GPSDO unit, described as model
57963.  No instructions or manual were included with the hardware.

The unit has now been powered up for the past 18 hours with the GPS antenna
connected with a favorable outside view of the southern sky.  I am however
uncertain if the hardware is GPS locked based on the two external ACT
status LEDs, the leftmost LED is solid yellow and the adjacent right LED is
rapidly flashing red.  The 1pps LED is flashing once per second as expected.

Can anyone point me to an online manual or explain the ACT status LEDs and
how to interpret those indications.

Thanks very much!
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