Sea Tel DAC-03, Инструкция по установке и эксплуатации

Страница: 47 / 80

DAC-03 Tracking Antenna Controller Functional Testing
6-3
•
In a “Dual Antenna” installation, this logic output(s) is used to control Dual Antenna Arbitrator panel
of coax switches to switch the source inputs to the matrix switch from Antenna “A” to Antenna “B”,
and vice versa.
•
When used as simple “
RF Radiation Hazard
” logic output for a single Sea Tel TXRX antenna, this
output could be used to suppress RF transmissions while the antenna is pointed where people
would be harmed by the transmitted microwave RF power output. The SW2 output would be
interfaced to the satellite modem to
disable the TX output signal from the Satellite TXRX Modem
whenever the antenna is within the RF Radiation Hazard zone(s).
•
When used for “
FCC TX Mute
” logic output for a single Sea Tel TXRX antenna, this output could be
used to suppress RF transmissions whenever the antenna is mis-pointed 0.5 degrees or more, is
blocked, searching, targeting or unwrapping. The SW2 output would be interfaced to the satellite
modem to
disable/mute the TX output signal from the Satellite TXRX Modem. When the mute
condition is due to antenna mis-pointing, it will not un-mute until the pointing error of the
antenna is within 0.2 degrees. The default output is contact closure to ground when the antenna is
mis-pointed, therefore provides a
ground to “Mute” the satellite modem on the SW2 terminal of
the Terminal Mounting Strip. If your satellite modem requires an
open
to “Mute”, refer to SYSTEM
TYPE parameter 16 value to reverse the output logic from the ACU.
To Test the blockage function:
1. Press the MODE key to access the Tracking menu.
2. Press the 5 key to simulate a manual BLOCKED condition to test SW2 logic output. BLOCKED will
appear in the Tracking display.
3. Verify that SW2 terminal shorts to ground (or open circuit if you have SYSTEM TYPE configured to
reverse the output logic) and that the external alarms actuate
OR the Dual Antenna Arbitrator
coax switches toggle (if antenna B is not blocked)
OR
the Satellite Modem TX is disabled/muted.
4. Press the
UP
arrow key is pressed to turn the simulated blocked condition OFF. BLOCKED will
disappear from the Tracking display.
5. Verify that SW2 terminal is open circuit (or ground if you have logic reversed) and that the external
alarms deactivate
OR the Satellite Modem TX is un-muted. The Dual Antenna Arbitrator coax
switches should not toggle until you manually block Antenna B ACU.