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

Remote Operation
MKDAm,snnnnnn.nn
Set Marker Number m to Desired Delay, n, in microseconds on Channel A. (200,000 microseconds
maximum)
MKDBm,snnnnnn.nn
Set Marker Number m to Desired Delay, n, in microseconds on Channel B. (200,000 microseconds
maximum)
Since marker information is constantly being updated in the 8500A, the MKCA and MKCB commands
described below are No Op with the 8500A instruments.
MKCAm Clear Marker Number m on Channel A.
MKCBm Clear Marker Number m on Channel B.
The preceding two commands clear both the current marker delay and any definition of automatic marker
placement. In other words, they define the marker not to be placed.
3.3.8 Window and Cursor Control Commands
Some commands can be used in the Graph Mode as well as the Peak Mode of operation. Peak power
measurements are made by placing the Cursor at the desired time point on the pulse to be measured. The
Cursor Delay is with respect to the Reference Delay. Therefore, in the Peak Mode of operation, it is
possible to set the Reference Delay and the Cursor Delay. These two commands are repeated here for use
in the Graph Mode of operation.
Reference Delay is primarily used only in situations where you want to pick an arbitrary point on the
pulse as the reference to which all other timing measurements are to be made. One example might consist
of a gaussian shaped TACAN radar pulse that is slightly distorted. You might want to make timing
measurements with respect to the highest point on the pulse. You might also want to know the timing of
the 3 dB point of the pulse with respect to its peak. When in doubt, the Reference Delay should be set to
0.0000 nanoseconds.
Besides the Reference Delay and Cursor Delay, the Start Delay and Window Delay can also be controlled.
When the Reference Delay is 0, the Start Delay is the time between the occurrence of a trigger and the
beginning of the display of information on the PPM’s graphic display. The Window Delay is the time
window shown on the PPM display. By expanding or contracting the window, it is possible to view a
wider or narrower pulse as desired. If Autoscaling is used, the PPM makes these settings automatically.
RDLAnnnnnn.nn
Set Channel A Reference Delay. This is an arbitrary reference point for referencing
other timing measurements.
Min. Value: 0 µs, Max. Value: 213999.97 µs
(n=microseconds)
RDLBnnnnnn.nn
Set channel B Reference Delay. This is an arbitrary reference point for referencing
other timing measurements.
Min. Value: 0 µs, Max. Value: 213999.97 µs
(n = microseconds)
CDLAsnnnnnn.nn
Set Cursor Delay for Channel A. Sets the timing position of the Cursor on the
graphic display, or for Peak measurements. The Cursor is the vertical line on the
display where the power reading (CSR PWR) is taken. (Timing is relative to the
Reference Delay.)
Manual No. 20790, Rev C, November 1998 3-31
Superceded by Revision D, March 2009