22
GPS Antenna and Cable Information
4.2
Verifying Antenna and Cable Operation
A two-color operate LED, located at the base of the antenna, indicates proper antenna operation.
GREEN indicates proper operation (i.e. the antenna is getting the correct voltage); AMBER
indicates improper operation (i.e. the voltage is low).
4.2.1
Checking the Antenna Voltage
The GPS clock pr5 Vdc to the GPS antenna, which is carried through the antenna cable.
Nominal antenna current is 13 mA (old style antennas are approximately 20 mA). Check the voltage
at the antenna connector on the rear panel. Without the signal, the antenna and the GPS clock
will not synchronize with the Global Positioning System and can generate an out-of-lock alarm, if
the Out-of-Lock feature is enabled.
4.2.2
Power Supply Check
The Antenna Voltage test (above) actually tests the main power supply voltage for all models of
clocks. This signal should be between 4.9 and 5.1 Vdc.
4.2.3
Checking the Antenna Resistance
Checking the internal resistance of the Arbiter GPS antenna is not as useful as verifying the antenna
operation mentioned above. Antenna resistance measures several megohms with meter probes at
one polarity and less so if you change the meter probe polarity (older style antennas can measure
3.8 kohms or 270 ohms).
4.3
GPS Surge Arrester
Figure 4.4 illustrates the GPS surge arrester kit (P/N AS0094500), which is mounted in line with
the antenna cable. The surge suppressor has two female F connectors, which are bidirectional, and
two ground lugs with hardware for connecting to a solid ground.
Figure 4.4: GPS Surge Arrester
Antenna
Receiver
Surge Arrester/Grounding Block
AS0094500A
4.3.1
Using the GPS Surge Arrester
Before installation, review the documentation on this device found in Appendix B. The AS0094500
surge arrester is weatherproof except for the F connectors, which may be sealed with rubber port
seals or GE Silicone II compound.
Содержание 1088A
Страница 4: ...iv ...
Страница 6: ...vi ...
Страница 18: ...xviii LIST OF FIGURES ...
Страница 23: ...1 4 Attaching Rack Mount Ears to 1088A B Series Clocks 3 Figure 1 2 Attaching Rack Mount Ears ...
Страница 24: ...4 Unpacking the Clock ...
Страница 32: ...12 Front and Rear Panels ...
Страница 38: ...18 Connecting Inlet Power Input and Output Signals ...
Страница 41: ...4 1 GPS Antenna Installation 21 Figure 4 2 Antenna Mounting Bracket Figure 4 3 Antenna Mounting with AS0044600 ...
Страница 46: ...26 GPS Antenna and Cable Information ...
Страница 48: ...28 Setting Internal Jumpers Figure 5 1 Model 1088B Main Board ...
Страница 76: ...56 The Setup Menus ...
Страница 112: ...92 Serial Communication and Command Set ...
Страница 127: ...B 4 Physical Dimensions 107 Figure B 1 Suggested Mounting of the AS0094500 Surge Arrester ...
Страница 128: ...108 Using Surge Arresters ...
Страница 137: ...C 5 Option 04 Parallel BCD Output 117 C 5 2 Option 04 Firmware Setup Figure C 2 Option 04 Firmware Setup ...
Страница 145: ...C 5 Option 04 Parallel BCD Output 125 Figure C 4 Option 04 Output Jumper Settings ...
Страница 146: ...126 Options List Figure C 5 Option 04 Board Layout and Jumper Locations ...
Страница 165: ...C 12 Option 17 Parallel BCD Output and Second RS 232 Port 145 Figure C 11 Option 17 Output Jumper Settings ...
Страница 166: ...146 Options List Figure C 12 Option 17 Board Layout and Jumper Locations ...
Страница 176: ...156 Options List C 14 5 Typical Network Configuration Figure C 15 Option 18 Network Configuration ...
Страница 187: ...C 16 Option 20A Four Fiber Optic Outputs 167 Figure C 22 Option 20A Jumper Locations ...
Страница 194: ...174 Options List Figure C 24 Option 23 Internal Jumper Setup ...
Страница 196: ...176 Options List Figure C 25 Option 27 Jumper Locations ...
Страница 214: ...194 Options List Figure C 28 Option 29 Connector Signal Locations ...
Страница 270: ...250 Options List ...