16-12-2016, 04:44 PM
Here are 2 photos of the close-in spectrum. Again the carrier looks clean.
this photo shows the internal OCXO.
This shows the external ProgRock PLL fed with 1PPS from chinese GPSDO
I also examined the 30.2 MHz output of the ProgRock on the speccy and it looked very clean.
Note that the marker dot moved on the second shot, that's due to drift of my spectrum analyser as it hadnt been turned on for long.
Next I will have to try the radio that's got the VK3HZ PLL in it and see what its transmit carrier looks like.
The other thing we should think about is that this thread shouldn't just be for the IC910h, as the ProgRock can be used to GPS lock plenty of other rigs too.
73 Dave vk2jds
this photo shows the internal OCXO.
This shows the external ProgRock PLL fed with 1PPS from chinese GPSDO
I also examined the 30.2 MHz output of the ProgRock on the speccy and it looked very clean.
Note that the marker dot moved on the second shot, that's due to drift of my spectrum analyser as it hadnt been turned on for long.
Next I will have to try the radio that's got the VK3HZ PLL in it and see what its transmit carrier looks like.
The other thing we should think about is that this thread shouldn't just be for the IC910h, as the ProgRock can be used to GPS lock plenty of other rigs too.
73 Dave vk2jds