B&K Precision 4079 - Manual - Manual (Page 46)

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a) The commands to set the amplitude, the offset, and to switch the output on. The output being switched on is included here
in order to prevent possible damage to the equipment being driven as a result of the amplitude and offset not being executed
as intended by the user, due to an execution error.
b) The commands to set the function, frequency, the point rate, the wavelength, and the waveform start address. In ARB
function, setting the frequency or the point rate causes the other to change, keeping the wavelength constant (if it, too, is not
specified in the same program message). If the wavelength is specified as well, the frequency or point rate must change in
accordance with the new value. The validity of the start address is a function of the wavelength. Please refer to the individual
commands for more detail.
The maximum frequency is also dependent upon the waveform, so that changing the waveform may render the 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 4076,0,V1.40
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.