Operation | 33
1/3 Rack Block Downconverters (Option 17)
DNB1-XTR, Rev.N, 8/14/2012
®
UNIT MEMORY REGISTER STORE/RECALL = MEM
The SET command stores band or frequency and attenuation into a selected memory register. Thus three parameters are
required: memory register, band or frequency and attenuation parameters. A fourth parameter for IF frequency is added
for Synthesized Converters. A second attenuation parameter may be included for systems with two attenuators. This
command does not affect unit operation.
Command
Command
Parameters
Parameters
Block Converter Remote Command Sequence:
Synthesized Converter Remote Command Sequence:
$MEMnnBbTttt(Aaaa)
$MEMnnFffffffffffffTttt(Aaaa)Ii
Unit Response:
$MEM
The QUERY command requires one parameter indicating the memory register to recall and returns the contents of that
register. This command does not affect unit operation.
Command
Command
Parameters
Parameters
Remote Command Sequence:
?MEMnn
Block Converter Response:
Synthesized Converter Response:
?MEMnnBbTttt(Aaaa)
?MEMnnFffffffffffffTttt(Aaaa)Ii
nn: Two-digit ASCII numeric characters, indicating the memory register accessed.
B: Frequency Band indicator.
b: 1 = Band 1, 2 = Band 2, etc.
F: Frequency indicator.
ffffffffffff: Twelve-digit ASCII numeric characters indicating frequency in Hz.
T: Attenuation indicator.
ttt: Three-digit ASCII numeric characters, indicating the attenuation in tenths of a dB.
A: Attenuation 2 indicator.
aaa: Three-digit ASCII numeric characters, indicating the attenuation in tenths of a dB.
I: IF indicator. (Synthesized Converters only)
i: “0”, “1” or “-” ASCII numeric character
0 = 70 MHz
1 = 140 MHz
- = Not Applicable
UNIT MUTE COMMAND = MUT
The SET command requires a one-digit parameter indicating mute or unmute.
Command
Command
Parameters
Parameters
Remote Command Sequence: ?MUTm
Unit Response:
?MUT
The QUERY command requires no parameters.
Command
Command
Parameters
Parameters
Remote Command Sequence: ?MUT
Unit Response:
?MUTm
MUT: Mute indicator
m: “0” or “1” ASCII numeric character
0 = Not mute
1 = Mute