08-12-2016, 11:38 AM
Further experiments.
Using a Trimble Ace 2 or Ace 3 gps module (cheap from junk sales and ebay, simoco radio pcbs) they have a 1 pulse per second output on pin 6, however this is only 10 microseconds wide , and the progrock wont synch off it. I just tried a few i had here.....
So, a pulse stretcher is required.
The other test was on another garmin head, but it has a 1 pps databurst instead of a clean quartersecond wide pulse. The progrock output frequency was jumping all over the place, like it was electronic music....
The 2 old motorola pcbs refuse to output correct timing, so they are going to the bin.
Tests continue, 73 from the bush
Using a Trimble Ace 2 or Ace 3 gps module (cheap from junk sales and ebay, simoco radio pcbs) they have a 1 pulse per second output on pin 6, however this is only 10 microseconds wide , and the progrock wont synch off it. I just tried a few i had here.....
So, a pulse stretcher is required.
The other test was on another garmin head, but it has a 1 pps databurst instead of a clean quartersecond wide pulse. The progrock output frequency was jumping all over the place, like it was electronic music....
The 2 old motorola pcbs refuse to output correct timing, so they are going to the bin.
Tests continue, 73 from the bush