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 <[email protected]> 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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