Operation | 35
1/3 Rack Block Downconverters (Option 17)
DNB1-XTR, Rev.N, 8/14/2012
®
UNIT MEMORY REGISTER STORE/ RECALL AND SET = SET
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. The unit
is set to the parameters included in the command.
Command
Command
Parameters
Parameters
Block Converter Remote Command Sequence:
Synthesized Converter Remote Command Sequence:
$SETnnBbTttt(Aaaa)
$SETnnFffffffffffffTttt(Aaaa)Ii
Unit Response:
$SET
The QUERY command requires one parameter indicating the memory register to recall and returns the contents of that
register. The unit is set to the parameters included in the reply.
Command
Command
Parameters
Parameters
Remote Command Sequence:
?SETnn
Block Converter Response:
Synthesized Converter Response:
?SETnnBbTtt(Aaaa)
?SETnnFffffffffffffTttt(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 SLOPE = SLP
The SET command requires a two-digit parameter representing the slope in dB.
Command
Command
Parameters
Parameters
Remote Command Sequence: $SLPsaa
Unit Response:
$SLP
The QUERY command requires no parameters.
Command
Command
Parameters
Parameters
Remote Command Sequence: ?SLP
Unit Response:
?SLPsaa
SLP: Slope indicator
s: ‘+’ or ‘-’ indicating sign
aa: Two-digit parameter indicating slope in 0.2 dB steps.