Sea Tel 4009-9 BROADBAND-AT-SEA, Руководство по установке

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4009-9 Installation Manual Setup – Modem Connections, Setup and Test
12-6
move the cursor left or right to select other characters to modify. When you are finished modifying press ENTER
to execute the new value Continue pressing ENTER until SAVE NEW PARAMETERS is displayed, and then press
the RIGHT arrow, UP arrow then ENTER to save the change(s).
12.8. Blockage Simulation Test - DAC-2202
Blockage output function is used to modify the behavior of Tracking and Searching when there is a known
blockage zone. The ACU provides a contact closure to ground on the SW2 terminal of the Terminal Mounting
Strip when the antenna is pointed within any one of the blockage/hazard zones or the system is searching,
targeting, unwrapping or is mis-pointed by 0.5 degrees or more (FCC TX Mute function for Transmit/Receive
systems only). The contact closure is a transistor switch with a current sinking capability of 0.5 Amp. This logic
output control signal is used for:
• When used as simple “BLOCKED” logic output for a single Sea Tel antenna, this output could be used to
light a remote LED and/or sound a buzzer to alert someone that the antenna is blocked, and signal is lost.
• 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 TX/RX 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 TX/RX 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 TX/RX 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.
12.8.1. Blockage Simulation Test - SW2 Trigger State: Logic Level LOW
1. Within the System Setup Parameters, Set System Type of the ACU to 0
(Do Not Save this Parameter
Setting)
.
2. Press the NEXT key until the Status main menu is displayed. (SEA TEL INC – Remote and
antenna software display).
3. Press the ENTER key one time to access the Tracking Control sub-menu.
4. Press the RIGHT arrow key four times to select tracking state editing mode.
5. Press the UP arrow one time to toggle current tracking state to blocked.
6. Verify “BLOCK” is now displayed as the current Tracking state.
7. Verify continuity between the SW2 and GND terminals on the interconnected TMS Assembly.
8. Press the LEFT arrow key four times.
9. Press the UP arrow one time.
10. Press the ENTER key.
11. Verify “ON” or “OFF” is displayed as the current Tracking state.
12. Verify an Open Circuit between the SW2 and GND terminals on the interconnected TMS
Assembly.