Installation manual

Setup – Modem Connections, Setup and Test 6009-33 Installation Manual
11-3
The functions below can be enabled to change the normal behavior of the system if desired. Select system options
according to the following table. Add together all the desired options and enter the sum into the SYSTEM TYPE
parameter to enable the desired functions.
128 Reverse External Modem Lock input polarity (logic hi = lock).
If you know that the modem you will be using with the system provides requires a logic hi (+15 VDC
max) when it has modem lock or you find the AGC reading for locked and unlocked conditions from
your modem need to be reversed you must enable this function in your current SYSTEM TYPE
parameter.
64 Enables LNB voltage output from the ACU.
This is NOT recommended for Series 09 systems, because they ALL provide the LNB voltage at the
pedestal.
32 Display Relative in the Azimuth entry display.
Enabling this function causes REL position to take the place of the DishScan signaling in the Azimuth
entry display. Relative position of the antenna is RARELY more desirable than the DishScan
signaling.
16 Reverse blockage output logic (SW2 logic hi = blocked).
If you know that the modem you will be using with the system requires a logic hi (open circuit) to
mute or you find that the Modem is being muted when the antenna is ON satellite (and un-muted
when the antenna is blocked, searching or targeting) you must enable this function in your current
SYSTEM TYPE parameter.
8 -- Reserved --
4 Auto SAT load after SEARCH failure.
Enabling this function will cause the ACU to re-target the calculated satellite position (rather
than returning to origin).
2 Enable External Modem Lock Input (logic low = lock)
This enables the ACU to use the external modem input. Expected input is logic low (0 VDC) when
the modem has RX sync/Network Lock and a positive voltage (+15 VDC max) when the does not
have lock. This function must be enabled to use the external input from ANY modem,
regardless of its locked/unlocked logic. [If you find the AGC reading for locked and unlocked
conditions need to be reversed you must add 128 to your current SYSTEM TYPE parameter].
1 Auto SAT load on “hot” RESET and ACU Power-Up.
Enable this function if you want the ACU to automatically re-target the satellite whenever the
system power is turned ON (after antenna initialization) or whenever the operator presses the
RESET button on the from panel of the ACU.
To change the SYSTEM TYPE parameter, press the LEFT arrow key to bring the cursor under the least significant
character. Continue to move the cursor until the desired character to be edited is underscored (selected). Use the UP
or DOWN arrow keys to increment or decrement the selected character. Use the LEFT or RIGHT arrow key to 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).
11.6. Blockage Simulation Test
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.