Chapter 7
Controlling the OBR Remotely
This chapter provides information about controlling the Optical Backscatter
Reflectometer remotely, using GPIB
or
TCP/IP commands.
This
section assumes
that
the user already has some familiarity with either GPIB or TCP/IP. For detailed
information
about
GPIB,
see IEEE 488.2
standards documents;
for
information
about
TCP/IP, see the IEEE 802 standards documents.
Nearly all functions that can be
performed
using the graphical interface of the control
software can also be performed remotely. This includes setting scan parameters,
performing measurements, filtering data, loading and saving data files, as well as
receiving data over the remote interface. However, continuous mode is not available
with remote operation.
Note: The x-axis and y-axis measurement data may be retrieved using the remote
commands. However, it can take a long time to transfer the maximum number of
points using the re-mote commands. It is recommended that the number of
decimated points be set to 65536 or fewer when using the FETC:MEAS? and
FETC:XAXI? commands. For processing larger amounts of data, it is preferable to
save files using the SYST:SAVE and SYST:SAVT commands, or to use the
Software Development Kit.
For higher speed remote operation, TCP/IP is recommended over GPIB.
Prerequisites
for Remote Control Setup
7
1 Be familiar with the use of GPIB or TCP/IP commands and the OBR
control software before attempting to control the OBR
remotely.
2 Network cabling must comply with IEEE 488.2 requirements for GPIB
operation, or with IEEE 802 requirements for TCP/IP
operation.
3 Some OBR functions require several minutes to complete. Adjust GPIB
or TCP/IP time-outs for your application accordingly.
4 Each device in the GPIB network must have a unique GPIB address,
typically from 1 to 30. The network controller is typically assigned an
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