B&K Precision 4078 - Manual - Manual (Page 43)

current frequency out of range.
c) The commands to set modulation, modulation source and the function are inter-related. FM and FSK are not
available for ARB function. External source of modulation can be active for either FM or AM but not both. FSK and
FM cannot be active at the same time.
d) Sweep start and sweep stop frequencies must be distanced more than the minimum allowed for sweep to function
correctly.
4.6 Block Data (GPIB Only)
Arbitrary waveform values may be sent to the device in one of three formats:
a) ASCII values,
b) Definite form arbitrary data, and
c) Indefinite form arbitrary data.
4.7 Instrument Identification
The *IDN? common query is used to read the instrument's identification string. The string returned is something similar
to the following:
B&K, MODEL 4078,0,V1.03
4.8 Instrument Reset
The *RST common command effects an instrument reset to the factory default power up state.
4.9 Self Test
The *TST common query causes the device to perform a self test. This self test consists of checking the functionality of
the arbitrary waveform memory.
4.10 Command Syntax
4.10.1 General Command Structure
The device commands are generally defined by the SCPI standard, with the exception of those instrument functions
for which SCPI commands do not as yet exist. The Common Commands and Queries are defined by IEEE 488.2.
The command syntax, i.e. how a command is structured, is defined by IEEE 488.2.
A Program Message is defined as a string containing one or more Program Message Units, each of which is an
instrument command or query. Program Message Units are separated from each other by the Program Message Unit
Separator. The Program Message is terminated by the Program Message Terminator.
The Program Message Unit Separator consists of a semicolon (';'), optionally preceded and/or followed by
whitespace characters. A whitespace character is defined as the ASCII characters in the ranges 00H-09H, and 0BH-
20H. This range includes the ASCII control characters and the space, but excludes the Linefeed character.
The Program Message Terminator consists of optional whitespace characters, followed by one of three options:
a) The Linefeed (LF) character (ASCII 0A);
b) The GPIB EOI bus line being set true on the last byte of the message;