Solartron 1250 - Operating Sequence for Gpib Plotter, Using Acontroller; Combinations of RS423 and GPIB Devices

The RS423 and GPIB Ports. Remote Control 1250 Frequency Response Analyzer
13-32 AMK/1250/4
13.16.1 OPERATING SEQUENCE FOR GPIB PLOTTER, USING A
CONTROLLER
To perform a GPIB plot using a Controller, first set up the 1250 for the desired type of
sweep and set the plotter controls. This preliminary setting up can either be performed
using the Front Panel keys, as described in previous Chapters, or remotely from the
Controller using the Commands given in Section 13.7 of this Chapter.
The Controller program should now continue, using the instructions defined in Section
13.8:
Instruction Meaning
OUTPUT "SV8" Configure SRQ for end of plot
OUTPUT "PL0" Plot graph
OUTPUT "SC3" Start linear sweep up (for example)
OUTPUT "RE" Recycle
OUTPUT "RG" Start Generator
The Controller must now instruct the 1250 to "talk" and the plotter to "listen". Plotting
will commence, and continue until an interrupt is asserted by the 1250, signalling End of
Plot. Alternatively, the controller can continuously interrogate the STATUS BYTE by
Serial Polling until it detects that the End of Plot bit has been set.
13.17 COMBINATIONS OF RS423 AND GPIB DEVICES
The 1250 can be used in a system containing both GPIB and RS423 compatible
devices. For example, the GPIB Controller could be a Calculator with no recording
capability whilst the RS423 port is connected to a tape cassette unit or a printer which
has no keyboard. In this case, whatever data the GPIB Controller requests from the
1250, i.e. Measurement Results, Learnt Programs or File contents, will also be available
at the Serial port, provided that the RS423 section of the DATA OUTPUT key facility is
set to any mode other than "off".
Conversely, if the 1250 GPIB port is set to TALK ONLY, and connected to a printer or
plotter set to LISTEN ONLY, data requested by a Command sent via the RS423 port will
also be sent to the GPIB, provided that the GPIB section of the DATA OUTPUT key
facility is set to any position other than "off".
However, if the 1250 GPIB port is set to TALKER/LISTENER, data requested via the
RS423 port does not appear on the GPIB.