EXFO LTK-1 User Manual page 174

Preparing for Automation
Getting Optimum Performance from Your Unit
Output unit (GPIB, RS-232, ActiveX and TCP/IP): Your unit can return

results in


Since internal units are linear, you will get optimal performance by
using linear units for output (no need for an internal conversion to log).
Note: You must make the choice of output unit for each instrument offering such
a feature. Refer to the user guide of each optical instrument for a list of
available commands and queries.
Output format (GPIB, RS-232, ActiveX and TCP/IP): Your unit provides

the following output formats for measurement results:


Generally, the PACKed format allows to pass three to four times more
information than the ASCii format for the same transfer rate. Often, the
PACKed format is also more efficient since it reduces your unit's CPU
work load (no need for an internal conversion to ASCII format).
Note: The PACKed format will only be applied to <DEFINITE LENGTH ARBITRARY
BLOCK RESPONSE DATA> and <INDEFINITE LENGTH ARBITRARY BLOCK
RESPONSE DATA>.
Note: The choice of data format cannot be made directly via the ToolBox X
software.
For more information on how to set the output format and data types, see
:FORMat[:DATA](IEEE 488.2 and specific commands appendix), Read and
ReadBinary (COM properties and events appendix), and the data types
appendix.
166
linear units (for example, watts)
log units (for example, dBm)
ASCii
PACKed
LTB-1