Figure 18: Rear Panel Connections
•
Connections
o
Main Power Input
1.
Plug the UPS DC supply charger into an AC mains outlet (100-240V).
2.
Plug the 12V DC output from the UPS into the jack on the left side of the rear
panel labeled “Main 12VDC”. Screw the plug down to secure it to the jack.
o
Backup Battery Charger Input
1.
Plug the backup battery charger supply into an AC mains outlet (100-240V).
2.
Plug the 12V DC output from the backup battery charger main supply into the
second jack from the left labeled “Aux 12VDC” on the rear panel. Screw the
plug down to secure it to the jack.
o
GPS Antenna Input
1.
Place the GPS antenna in a position where it has a good view of the sky. This
may be outside or it may be in a window (preferably facing south).
2.
Connect the GPS antenna cable to the jack labeled “GPS Ant.” Screw the
connector down finger-tight.
o
Rate Error Printer Output
1.
Connect the cable from the Thermal Printer to the jack labeled “Printer” on the
rear panel by turning it so the red dots align and pushing it on. No tightening is
required. The printer cable may be removed by grasping its knurled sleeve and
pulling straight out.
2.
Using the Printer is optional and will not affect the operation of the TTC.
o
Chronometer 1pps Tick Output
1.
The “Chrono” output supplies the signal from the contact points in the Hamilton
chronometer. This output is a 5V logic-level signal that goes to ground at the
beginning of each second, except for the 59
th
second.
2.
The Chrono output may be used for diagnostic purposes but does not affect the
TTC operation.
o
Cesium 10MHz Output
1.
This output, labeled “10 MHz”, may be used for other purposes, such as
providing a reference signal to another instrument. Its use is not required for
TTC operation. This output comprises a “Stratum 0” reference signal.
o
CSAC 1pps Output
1.
This output is a one-pulse-per-second output from the EVK-M8F GNSS receiver.
2.
The 1pps signal initiates the rotational motion by the Servo Synchronization
function which keeps the Hamilton chronometer locked to the Atomic and GNSS
time. This output comprises a “Stratum 0” one-pulse-per-second signal .
Summary of Contents for The Time Traveler's Clock
Page 19: ...Figure 12 Cesium Chip Scale Atomic Clock Circuit Board...
Page 23: ...Figure 16 Time Traveler s Clock System Schematic Diagram...
Page 24: ...Figure 17 Hamilton 21 Chronometer Starting Instructions...
Page 25: ...TTC Installation and Operation Manual...
Page 34: ...Figure 21 Gimbal Locking...
