B&K Precision 4078 - Manual - Manual (Page 40)

Section 4
Programming
4.1 Overview
4.1.1 GPIB
This section provides detailed information on programming the 4075 and 4078 via the IEEE 488 bus (referred to
from now as the GPIB - General Purpose Interface Bus). The 4075 and 4078 are programmable over the IEEE 488.1
bus, and its message protocol is compatible with IEEE 488.2. The device command set is compatible with the SCPI
1992.0 standard.
The command syntax as defined by the IEEE 488.2 and SCPI standards is briefly explained in the following
sections. Users who have experience programming GPIB instruments may skip these paragraphs, and go directly to
where the individual command syntax is given in sections 4.12 and 4.13. Considering the relative newness of these
standards, it is recommended to all users to read the explanations given here. Users wishing to gain further insight
should consult the standards.
4.1.2 RS-232-C
The RS-232-C standard is not very specific about many of the handshaking signals and it is therefore usually
necessary to refer to the manuals for both of the devices being connected to determine the exact pin out, signal
definition, and signal direction for the devices. Refer to section 2.9 .
The serial interface implements the same SCPI command set as the GPIB interface. This includes commands stated
in sections 4.12 and 4.13. Refer to these sections for syntax details. The instrument is programmed by sending
ASCII coded characters to the instrument.
When the instrument is in the remote mode, remote command input has priority over any front panel control.
Therefore, as long as the serial interface is continuously supplied with data, the keyboard will appear to be
inoperative to the user.
Note: In remote mode, any command sent or receive via RS232 will change the display screen with the
following:
User can return to local control with the press of any front panel keys, but it is extremely important to note that
this should be done ONLY when nothing is being sent or transferred between the instrument and the connected
PC. Any interruptions during transfer may delay the communication process. For large waveforms
transmission, be it sending or receiving, please allow at least 15 seconds before pressing any front panel keys to
return to local mode. The instrument needs the additional time to completely generate or send the waveform.