Paragon-X Getting Started Guide
Page 21 of 28
Rb/GPS Frequency Reference
The Calnex external Rb/GPS Frequency Reference may be supplied as an option to Paragon-X (Opt.
132) or ordered separately. The device provides a 10MHz and a 1PPS measurement reference that
may be used by Paragon-X or other equipment.
To use the external Rb/GPS Frequency Reference simply connect a GPS Antenna to the rear panel GPS Antenna
Input connector, switch it on and wait until all the LEDs are green. Then connect either the 1PPS Ref Output
to the Paragon-X 1PPS rear panel connector and/or the 10M Ref Output to the Paragon-X 10MHz Reference
Input rear panel connector.
The Rb/GPS Frequency Reference has the following front and rear panel features:
•
Power On LED
•
Rb Locked LED
•
Track/Sync LED
•
10M Ref Output
•
1PPS Ref Output
•
RS232
•
DC Power Input
•
Power Switch
•
GPS Antenna Input
Power On
The Power ON LED is green when the power switch is on and power is connected.
Rb Locked
The Rb Locked status LED is green when the internal crystal oscillator is locked to the rubidium source.
Track/Sync
The Track/Sync status LED is green when the 1PPS output of the rubidium source is aligned to the
GPS signal's 1PPS.
10M Ref Output
50Ω BNC connector, output 10MHz signal of 4.0Vpp/50Ω.
1PPS Ref Output
50Ω BNC connector, output 1PPS pulse (0/5V CMOS). Pulse width 100µs.
