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

Series 8500A Peak Power Meters
Command
Argument
STORnn
TRGAsnn.nn
TRGBsnn.nn
TRGE
Store Current PPM Settings in Non-Volatile Set-Up Memory Number n / none
(n = number between 1 and 10)
Select Channel A Internal Trigger and Set Level in dBm / none
(s = polarity; n = trigger level - +16 dBm max -20 dBm min)
Select Channel B Internal Trigger and Set Level in dBm / none (See TRGA)
Select External Trigger Mode / none
UNDD Disable PPM SRQ for Underrange Conditions. See Service Requests in Section 3.4 /
none
UNDE
UPDC
Enable PPM SRQ for Underrange Conditions. An SRQ will be generated if the
power level measurement data is below the level set by MINP / none
Select Update Data Continuously Output Mode. The PPM will output a continuous
stream of power measurement data points separated by commas. Every time the PPM
receives a trigger a new data point is added to the stream. The formats described
below can occur.
When using the FREQ, DCFA (A Cal Factor), DCFB (B Cal Factor), or FPRV (Rear
Panel Frequency Input) methods for detector frequency response correction, the
PPM’s Linear Mode data output string for channel A will be:
PWRAnn.nnEsnn,PWRAnn.nnEsnn,PWRAnn.nnEsnn
(n = linear power in Watts; Esnn = exponent)
This example shows a data string for 3 triggers. Subsequent triggers will produce
more data points separated by commas in the form of PWRAnn.nnEsnn. For
channel B the header before the data points would be PRWB instead of PWRA.
The PPM’s dBm Mode output for channel A would be:
DBMAsnnn.nn,DBMAsnnn.nn,DBMAsnnn.nn
(s = polarity; n = dBm)
This example shows a data stream for 3 triggers. Subsequent triggers will produce
more data points separated by commas in the form of DBMAsnn.nn. For channel B
the header before the data points would be DBMB instead of BDMA.
When using the FPVO (Rear Panel Frequency Input and Output) method for detector
frequency response correction, the PPM’s Linear Mode data output string for
channel A will be in the form:
PWRAmm.mmEsee,FRQAfff.ffE+09,PWRAnn.nn
Esee,FRQAggg.ggE+09
(m = first power data point;
f = first frequency data point;
n = second power data point;
g = second frequency data point;
Esee = exponent for power in Watts;
E+09 indicates frequency is in GHz)
This example shows a data stream for 2 triggers. Subsequent triggers will produce
more data points separated by commas in the form of
PWRAnn.nnEsnn,FRQAfff.ffE+09. If the PPM is in channel B the headers before the
data points would be PWRB and FRQB. See preceding NOTE for description
of dBm header and data formats.
3-50 Manual No. 20790, Rev C, November 1998
Superceded by Revision D, March 2009