3152B User Manual
Publication No. 980935 Rev. A
5-86 Programming Reference
EADS North America Test and Services
PSK Modulation
Programming
Use the following commands for programming the PSK parameters.
The PSK function can shift from start to shifted phase setting, within
the range of 0 to 360
°
, at a frequency determined by the rate value
and controlled by a sequence of bits in the PSK data table. The
commands for programming the phase shift keying function are
described below. Note that the carrier waveform frequency (CW)
setting is common to all modulation schemes.
PSK:PHASe <start_phase>(?)
HS Syntax: 0091A<float>(?)
Description
This programs the start phase of the carrier waveform. The start phase shifts when the pointer in the data
array points to “0”.
Parameters
Name
Range
Type
Default
Description
<start_phase>
0 to 360
Numeric
0
Programs the start phase for the carrier waveform in
units of degrees.
Response
The 3152B returns the current start phase value.
PSK:PHASe:SHIFted <shift_phase>(?)
HS Syntax: 0092A<float>(?)
Description
This programs the shifted phase. The phase shifts when the pointer in the data array points to “1”.
Parameters
Name
Range
Type
Default
Description
<shift_phase>
0 to 360
Numeric
180
Programs the shift phase for the carrier waveform in
units of degrees.
Response
The 3152B returns the current shift phase value.
PSK:RATE <rate>(?)
HS Syntax: 0093A<float>(?)
Description
This allows the user to select PSK word rate. The word rate is the interval of which the bit streams in the
PSK data array are clocked, causing the output phase to hop from start to shifted phase values and vice-
versa. Note that this command is dedicated for programming the PSK modulation function only.
Parameters
Name
Range
Type
Default
Description
<baud>
1 to 10e6 Numeric
10e3
Programs the rate of which the phase shifts from start
to shifted frequency in units of Hz.
Response
The 3152B returns the current baud value.
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