Sea Tel 5009-33 BROADBAND-AT-SEA Installation Manual Download

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Setup – Modem Connections, Setup and Test

5009-33 Installation Manual

12-3

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.

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.

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.

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.

-- Reserved --

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).

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].

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

DOWN

arrow keys to increment or decrement the selected character. Use the

LEFT

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,

arrow then

ENTER

to save the change(s).

12.6.

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.