Keysight Technologies N5171B EXG, Руководство пользователя

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368 Keysight EXG and MXG X-Series Signal Generators User’s Guide
Custom Digital Modulation (Option 431)
Creating and Using Bit Files
Creating and Using Bit Files
This procedure teaches you how to use the
Bit File Editor
to create, edit, and store
user-defined files for data transmission within real time I/Q baseband generated modulation. For
this example, a user file is defined within a custom digital communications format.
User files (user-defined data files) can be created on a remote computer and moved to the signal
generator for subsequent modification, or they can be created and modified using the signal
generator’s
Bit File Editor
.
These user files can then be transmitted data as a continuous unframed data stream according to
the protocol of the active format, transmitted as the data for a custom ARB modulation or real-time
format. User files are not available for signals generated by the dual ARB waveform generator.
Figure 16-9 Data Selection Softkeys
For information on creating user-defined data files on a remote computer,
see the Keysight Signal Generators Programming Guide.
Mode > Real-Time Custom Modulation >
Modulation Setup
For details on each key, use key help as described on
page 40
.
Press this key to select from a
number of P sequences and
whether to invert them.
Press this key to select data
patterns of 1s and 0s.
Press this key to create, select, and
edit files to use as the bit pattern.
Press this key to select a Pattern
RAM (PRAM) file.
PRAM files are binary arrays in byte
format. Each byte consists of a data
bit (LSB/bit 0), a burst bit (bit 2), and
an Event 1 output bit (bit 6). The
PRAM internal format consists of 4
bytes for each PRAM byte.
PRAM files are useful for specifying