Paul,
I finally got the WWVB d-psk-r board built. I have it connected to an
Arduino UNO and to my NEO-6 GPS module.The GPS module has been
re-programmed to 19.2k baud and only the GPRMC NEMA message is being
sent. The MC34141 is running at 12 volts and I am using 620 ohm
resistors to drive the
Thanks much, Kevin, interesting point. If I connect the Tbolt to the
PD5120's DC Block port, and another GPSDO to the DC Pass port, Heather
shows the Tbolt's status with "Tracking satellites" in green. However,
"Antenna open" continues to display in yellow.
But it seems there was a more
Does the setup with the PD5120 work if the TBolt is connected to either port?
Some GPS receivers look to see if the antenna is drawing current, to determine
if it’s alive. With a splitter, the receiver might not see an antenna current.
I seem to recall the TBolt had a setting for that.
KR
>
Ed,
Good work digging deep into that. I remember hearing about someone
playing with the Oncore oscillator. It was Robin Giffard, one of the key
architects behind the hp SmartClock series (58503A, Z3801A, etc.). A
copy of his paper:
"Estimation of GPS Ionospheric Delay Using L1 Code and
Based on a recommendation here sometime back, I bought a Symmetricom
58536A distribution amplifier so that up to four GPSDOs can share my
rooftop Lucent 26db twist antenna.
When I connect the antenna to its port on the 58536A, and a Trimble
Thunderbolt to port 1, Heather shows no antenna
Thanks all, for the info on this issue. It does indeed look doable to
experiment with phase-locking the GPS RX module's internal clock to the
ultimate 10 MHz GPSDO output. That is, doable, but not necessarily easy
or without problems.
I dug up my old notes and info from about ten years ago,
