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ATLANTIC SATELLITE CORPORATION
MODEL ASC300LW
BEACON RECEIVER
9
Address (Hex) <space>f4f3f2f1<space>k2k1<space>at3,at2,at1<space>
Where address is the Hex value of the assigned address, f4 is the most significant
digit of frequency in MHz, k2 is the most significant digit in kHz, g3 is the most
significant digit of gain. The range of frequency is 950.00 to 2300.00 and the range of
attenuation is 0 to 600. If a frequency of less than 950 or greater than 2300 and/or an
attenuation of greater than 600 or a least significant digit of a number other than 0 or
5 is transmitted then
?
will be transmitted back. The address, frequency in MHz and
kHz and gain must be simultaneously transmitted. They cannot be transmitted
independently.
The attenuation of the unit can be changed by transmitting any number from 0 to 600.
The least significant digit must either be a 0 or a 5. 0 corresponds to 0.0 dB
attenuation and 600 corresponds to 60.0 dB of attenuation. To change the attenuation
by 0.5 dB, the least significant digit must be a 5. For example, to change the
attenuation setting to 26.5 dB, the number string 265 must be transmitted.
An example to change frequency and attenuation is:
A (Hex) <space>1210<space>99<space>265<space>
The unit will change to 1210.99 MHz and an attenuation of 26.5 dB.
To poll the unit to see if the changes have been made transmit the following
sequence;
A (Hex) <space>0<space>0<space>0<space>
The unit will echo back the following:
AD=A,F=1210.99,ATT=26.5,SS=(As determined)
If there was an alarm conditions the unit would echo back at the end of the response
string the word
ALM
.
If the unit has
NO
selected as the address then no address is necessary as a preface to
the serial commands.
To poll the unit to see if the changes have been made transmit the following
sequence;
0<space>0<space>0<space>
All other commands are the same as described above with the exception that the
address character does not need to proceed the command structure.
