Racal Instruments 3156B, Руководство пользователя

Страница: 182 / 385

3156B User Manual
Programming Reference 5-30 Racal Instrument © 2005
1
ARB - Use this arbitrary mode to generate an
arbitrary waveform. Arbitrary waveform(s) must
first be loaded into one or more memory
segments. Once loaded, the segments become
a library of waveform that can be selected
individually to be generated at the output
connector.
2 SEQ - The sequenced mode is used for generating a
sequence of memory segments. The definition of the
sequence is stored in a sequence table where
segments can be linked and looped in a user defined
fashion.
3 MOD - The modulation mode is used for generating
modulated waveforms. The modulated carrier signal
is always sine waveform. The carrier can be
modulated using one of the following modulation
modes: FM, AM, FSK, SWEEP and HOP
4 VIDEO - The video stoke is used for generating
special video signals for driving TV's and analog
monitors. In this mode, both channels operate
simultaneously and in conjunction with each other,
similar to XY mode in oscilloscopes. Therefore, any
setting of global operation mode other than both
channels set to video will result in setting conflict
error
5 DIGITAL - The digital output mode cannot be turned
off! Whenever there is a signal at the output
connector, there is signal on the digital output lines
as they are connected in parallel and buffered from
the 12 bits (out of 16) that drive the DAC. If you
specifically select the Digital mode, you also need to
select if you want to operate in free-running or
stimulus run mode.
Default Value: 0
Return Values
Displays the return status of the function call. If the function was successful, it will return a status of
VI_SUCCESS, otherwise it will return an error code. Passing the error code into the function
"ri3156B_error_message()" will return a string describing the error.