Hi,
yesterday i came across an interesting ebay listing of what seems like a commercial GPSDO module. (3 pictues attached)
The seller doesn't have any information about it only that it was pulled fom a Harris DBT transmitter and that it has an
OCXO in it. Searching for the part number and various combinations of 'Harris DBT transmitter' only lead me to an italian
surplus seller (0) and judging from the pictures it looks like the transmitter in question is a Harris DBT-050U or similar.
Looking at the PCB i can only identify the OCXO module (lower right corner), a GPS receiver, the PLL around the Philips PLCC IC
and the Xilinx FPGA which might run some software (stored in the labelled E(E)PROM) to pull it all together.
Other than that, the top layer seems to be a large ground plane, i assume there are some more components on the
back which might lead to identifying a UART interface or something else to talk to the module but i don't have photos of that.
Initially i was only looking for an OCXO and build the tuning circuit myself but if this module is able to work autonomously
without being attached to a controller module i could simply use the 1Hz and 10MHz outputs and be done with it.
Have you seen such a module and might even know if it would be sensible to buy it?
(0)
http://www.telecomponents.com/catalog/agile-digital-tv-transmitter-dvbt-screen-dvb-t-uhf-p-661.html