Sea Tel 9711-92, Installation And Operation Manual

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Setup – Modem Connections, Setup and Test 9711-92 Ku-Band TXRX
12-6
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.
12.8.2. Blockage Simulation Test - SW2 Trigger State: Logic Level HIGH
1. Within the System Setup Parameters, Set System Type of the ACU to 16
(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 an Open Circuit 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 continuity between the SW2 and GND terminals on the interconnected TMS Assembly.
12.9. Testing the Satellite Modem Lock Input - DAC-2202
The input connections from the modem can be tested by selecting the external AGC input and monitoring the
displayed value. To test the external AGC, set the tuning frequency to 0000. Normally, AGC readings below 800 are
considered a low condition and indicate modem lock and AGC readings above 800 are considered a high condition
and indicate modem unlock.
1. Verify that the satellite modem currently has RX Sync (RX Sync LED ON).
2. Turn tracking
OFF
so that the antenna stays pointed ON satellite.
3. Press
NEXT
until the Satellite menu is displayed. Press
ENTER
3 times to display the Frequency entry
window. Record the frequency that the tracking receiver is currently tuned to. Press
LEFT
or
RIGHT
arrow
key to bring up the cursor under the units digit Use the
UP
or
DOWN
arrow keys to increment or decrement
the selected digit, use the
LEFT
arrow key and the
UP
or
DOWN
arrow keys to change the next digit.
Continue until frequency is set to 0000. Press the
ENTE
R key to tune the tracking receiver to this frequency.
4. View current ON satellite
LOCKED
AGC value in the lower right corner of the display and measure the DC
Voltage from EXT AGC (+) terminal to the GND (-) terminal. The iDirect and Comtech modems should have
an AGC readings below 800 (LOCK = low condition) and 0 VDC across the EXT AGC and GND terminals. The
Hughes modem will have an AGC reading above 800 (LOCK = high condition) and 12VDC across the EXT AGC
and GND terminals.
5. Disconnect the RXIF input coax from the rear of the satellite modem. It should lose RX Sync (RX Sync LED
OFF).
6. View current ON satellite UN-LOCKED AGC value in the lower right corner of the display and measure the
DC Voltage from EXT AGC (+) terminal to the GND (-) terminal. The iDirect & Comtech modems should have
an AGC readings above 800 (UN-LOCKED = high condition) and about +12 VDC across the EXT AGC and GND
terminals. The Hughes modem will have an AGC reading below 800 (UN-LOCKED = low condition) and
12VDC across the EXT AGC and GND terminals.
7. Reconnect the RXIF input coax to the rear of the satellite modem. It should regain RX Sync (RX Sync LED
ON).
8. Press
LEFT
or
RIGHT
arrow key to bring the up the cursor under the units digit Use the
UP
or
DOWN
arrow
keys to increment or decrement the selected digit, use the
LEFT
arrow key and the
UP
or
DOWN
arrow keys