_____________________________________________________________________
ATLANTIC SATELLITE CORPORATION
MODEL ASC300LW
BEACON RECEIVER
8
5.0 Serial Communications:
REMOTE OPERATION
Note: The unit must be placed in the remote mode of operation to perform any serial
communication functions. Select the interface mode (RS-232 or RS-485) by
placing the rear mounted mode switch in the appropriate position.
The unit can be remotely monitored and commanded by use of an RS-485, 4-wire,
interface or an RS-232, 2-wire interface. The serial protocol is the same for both
modes and is as follows:
2400 Baud, No parity, eight data bits, one stop bit
(2400,N,8,1)
The unit can be assigned a Hex address within the range of values of 1 Hex to F Hex.
The assignment of the unit address is accomplished by the following sequence:
1. Place the unit in the REM (remote) mode of operation by depressing and holding
the LOC/REM button and depressing and releasing the RESET button. The unit
will toggle between the LOCAL and REMOTE mode of operation. When the
REMOTE mode is selected, REM will be displayed in the lower left corner of
the front panel display.
2. To select the address for the unit, press and release the UP or DOWN buttons
until the desired address is selected in the range of NO or 1 to F where NO
means that no unit addressing is required and 1 to F requires that the hexadecimal
equivalent of the selected address must be sent to communicate with the unit.
3. The unit needs to be left in the REM mode of operation for external control of
the unit.
To poll the unit for operating status when the unit is in addressing mode of 1 to F,
transfer the following sequence:
ADDRESS (HEX) <space>0<space>0<space>0<space>
The unit will respond back with the current operating settings and alarm conditions
AD=address, F=f4f3f2f1.k2,k1, ATT=AT3,AT2 . AT1, SS=v2,v1.m1,m2
Where address is the hex value of the unit, f4f3f2f1 is the operating frequency in
MHz, k2, k1 is the operating frequency in kHz, AT3, AT2, . AT1, is the attenuation
setting in dB from 0.0 to 60.0, v2, v1,m1, m2 is the signal strength in volts from 9.99
to 0.00.
If an alarm condition exits, the unit is out of lock, and then the signal strength voltage
will not be displayed and will be displaced with the word ALARM.
To change parameters of the unit transmit the following command string:
To Next Page
Loading...