Manual - 8500A Series Peak Power Meter - Giga-tronics

Remote Operation
*RSWD
Measure and output rise time and pulse width of displayed pulse profile. For
definitions of rise time and pulse width, see *RISE and *PLWD descriptions. Output
format for channel A is:
RISAnn.nnnEsnn,WIDAnn.nnnEsnn
(n = seconds; Esnn = exponent)
Output format for channel B is:
RISBnn.nnnEsnn,WIDBnn.nnnEsnn
*WDFL
Measure and output pulse width and fall time of displayed pulse profile. For
definition of fall time and pulse width, see *FALL and *PLWD descriptions. Output
format for channel A is:
WIDAnn.nnnEsnn,FALAnn.nnnEsnn
(n = seconds; Esnn = exponent)
Output format for channel B is:
WIDBnn.nnnEsnn,FALBnn.nnnEsnn
3.3.7 Manual Marker Placement/Timing Measurement Commands
The PPM has a very forgiving command syntax. It is possible to send many commands in one string. For
example, it is possible to use one string to place four different markers and then have the PPM output
two pairs of delay differences.
Due to the upgrading of the software functions in the 8500A instruments, some of the commands shown
in this section will not be required when new code is written for the 8501A/8502A meters. The
commands are retained in this manual for users with programs written for older 8500 instruments, and
who want to cross-reference for the new 8500A instruments. If old code has been written for an 8500
instrument and includes some of these commands, the program will still operate with the 8500A but the
commands will have no function. The term No Op is used in the descriptions for these commands. The
commands that fall into this category will be defined.
The MRKA (or B) command must always be executed before any other marker bus commands will be
accepted.
MKPRn,xx.x
Place Marker n (1 to 4) on the rising edge of the pulse at the % reference power defined by xx.x, and
output the delay. The specified % reference must be between 0.1% and 99.9%. If channel A is in use, the
PPM will output:
MRKAm,snn.nnnEsnn
If channel B is in use, the PPM will output:
MRKBm,snn.nnnEsnn
(m = marker number; s = polarity; nn.nnn = delay in seconds; Esnn = exponent)
MKPFm,xx.x
Place marker n (1 to 4) on the falling edge of the pulse at the reference power defined by xx.x, and
output the delay. The specified reference power must be between 0.1% and 99.9%. If channel A is in use,
the PPM will output:
Manual No. 20790, Rev C, November 1998 3-29
Superceded by Revision D, March 2009