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

Remote Operation
3.3.9 Commands to Output Graphic Data to a Controller
The PPM can be programmed to output data in several ways as described in Section 3.2.5. When working
with graphic displays it may be useful to enter the entire pulse profile into the controller. Once data has
arrived at the controller, various programmed operations can be conducted. For example, you can
program the controller to calculate the peak-to-peak pulse flatness. The advantage of this method of data
acquisition is that it is not necessary to go through the procedure of placing the cursor, taking a power
reading, and then repeating the procedure until all points of interest are entered into the controller.
The PPM graphic display dump capability allows the controller to use one command to fetch 118 data
points along the pulse profile, as well as any pertinent timing settings relating to the profile being
examined.
DUMG
Output All 118 Power Measurement Points of the Displayed Pulse Profile. If Channel A is in use,
the PPM will output:
RDLAnn.nnnEsnn,
SDLAnn.nnnEsnn,
WDLAnn.nnnEsnn,
PWRAnnn.nnEsnn,nnn.nnEsnn, (repeats until all 118 data points have been output)
(Esnn = exponent)
The PPM outputs the Reference Delay (RDLA) in seconds (nn.nnn), then the Start Delay (SDLA), and
then the Window Delay (WDLA). This information is followed by the 118 power readings representing
the pulse profile. All fields and data points are separated by commas. The header for the power readings
is PWRA. The power readings take the form of nnn.nnEsnn; where nnn.nn is always in Watts, and Esnn
is the exponent.
When the PPM outputs using Channel B, the headers change to indicate B channel:
RDLB
WDLB
SDLB
PWRB
Manual No. 20790, Rev C, November 1998 3-33
Superceded by Revision D, March 2009