[time-nuts] FTS-4060M/S24
Björn Gabrielsson
bg at lysator.liu.se
Fri Jun 20 03:24:29 EDT 2008
On Thu, 2008-06-19 at 22:54 +0000, Mark Sims wrote:
> I recently bought a FTS-4060M/S24 cesium beam unit.
[...]
> There are a few issues with it. First the crystal oven monitor reading
> stays at 5V. The unit has an FTS-2000A OCXO. This is basically a smaller
> OCXO that is mounted on a carrier and has a small connector PCB attached
> that converts the pinouts to match the Datum 1000 OCXO.
> The OCXO does seem to stabilize at the proper freq.
> All the other monitor voltages seem OK.
I have a few 10.23MHz FTS2000 units. Got them running through reverse
engineering magic. Thanks Magnus! Mine are marked "Model" 2000/S02A/S18
and 2000/S03/S18 (400Hz offset model)
How is yours marked? (assume its a 10MHz model)
Does your Cesium manual mention the pinout or the specifications for the
OCXO? Is your FTS1000 adaptor compatible with the below pinout? Does it
use pins 6 and 9?
This is the pinout Magnus found out. Connector is "DSUB with 1 center
coax and 10 pins", (used on Datum FRS rubidiums)
J1 - 1 +28Vin
J1 - 2 +28Vin
J1 - 3 EFC
J1 - 4 GNDA
J1 - 5 0V
J1 - 6 Unknown
J1 - 7 28V_Return
J1 - 8 GNDA
J1 - 9 Unknown
J1 - 10 +15Vin
thanks,
Björn
More information about the time-nuts
mailing list