[time-nuts] Jackson GPSTCXO question

Said Jackson saidjack at aol.com
Sun Apr 21 01:54:06 EDT 2013


Hi Tom,

Sorry, that unit is using an AMY GPS, which does not support Position Hold or Auto Survey mode.

You can however set longer time constants by reducing the serv:efcs parameter if the unit is shielded from all airflow. That can reduce the ADEV at 10s to 1000s.

Bye,
Said

Sent From iPhone

On Apr 20, 2013, at 22:12, Tom Clark <tom.k3io at gmail.com> wrote:

> I'm evaluating a Jackson GPSTCXO that was in a Symmetricom Eval Kit. It's showing impressive perfomance with just the antenna in the window. I'm using either the Z38xx or GPSCon software. Are there commands that would allow me to
> 
> 1. Force the receiver to do a self-survey and/or
> 2. Force the position into "zero-D" mode by locking the position to a
>   known value?
> 
> Tnx & 73 de Tom, K3IO (ex W3IWI)
> 
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