[GPS_Standard] MonTrol Issue with Control Window.

[Gill, Richard]

I have my Frequency Standard up and running for a few days using a Datum
LPRO Frequency Standard as the reference oscillator. 

 

It took a while to get it up and running as I am using a Garmin
GPS-25HVS and could not get the 1pps output to work. After trying 3
different units I figured out that the 1 pps output was not enabled and
had to be turned on by sending a command string to the GPS Engine. This
turned out to be difficult to do using the windows terminal program. I
then found a program on the Garmin web site http://www.garmin.com/oem
called " snsrcf.exe " This program allows you set all the engine
switch's including turning on the 1 pps output and the Position Pinning
mode discussed in the user manual. 

 

Another problem I am having is changing the FLL Parameters using the
MonTrol Control Window. I will make changes to some of the parameters in
the window, and then a few cycles later it will change back to original
setting. This is especially true of the Averaging Cycle size. I have to
go into the windows terminal program and send a Syyzz command to change
it.

Any body have any ides what I am doing wrong?

The values I plug into the boxes on the Control window are regular
decimal values correct?

 

 

 

I also am having problems getting the TTL to RS232 converter to work
correctly. I have a PCBA that uses the MAX 232A chip. I get scrambled
data or none at all into the computer. What is working is a FTDI TTl to
USB Converter cable. I am using this short term, but intend to use the
Max converter when I get it working.

 

Thanks for the Help

 

Rich KQ6EF

 

 

 

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