Tabor Electronics 5064, User Manual

Page: 272 / 369

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5-51
The instrument steps through these events in a
sequence as listed in the QAM:DATA table and at a
frequency
which is programmed using the
QAM:BAUD parameter.
USER Discrete Selects the User QAM modulation type. There are no
pre-assigned symbols for this mode and therefore,
the symbols must first be designed using the
QAM:USER:DATA table. The instrument will then
step through the programmed symbols in a sequence
as listed in the QAM:DATA table and at a frequency
which is programmed using the QAM:BAUD
parameter.
Response
The 2074 will return 16QAM, 64QAM, 256QAM, or USER depending on the selected QAM type setting.
QAM:BAUD<baud>(?)
Description
This allows the user to select (n)QAM baud. The baud is the interval of which the symbols stream in the
(n)QAM data array as they are clocked with the baud generator.
Parameters
Name Range Type Default Description
<baud> 1 to
10e6 Numeric 10e3 Programs the baud of which the symbols stream in
the (n)QAM data table. Baud is programmed in units
of Hz.
Response
The 2074 will return the present baud value. The returned value will be in standard scientific format (for
example: 100mHz would be returned as 100e-3
– positive numbers are unsigned).
QAM:CARRier:STATe{OFF|ON|0|1}(?)
Description
This command will toggle the carrier waveform (CW) on and off. The carrier off function is especially useful
as direct input for I & Q vector generators that need the digital information only and supply the carrier
information separately.
Parameters
Range Type Default Description
0-1 Discrete 1 Sets the carrier output on and off
Response
The 2074 will return 1 if the output is on, or 0 if the output is off.