Giga-
tronics 2400/2500 Microwave Synthesizer Series
8: List Mode Operation
Programming Manual, Part Number 34783, Rev A, July 2009
179
Chapter 8.
List Mode Operation
2400/2500 list mode operation is not available from the front panel. In order to use list mode, remote
programming must be used.
Automation Xpress is the preferred method of using the 2400/2500 in remote operation. For
information on using Automation Xpress, refer to Chapter 5 on page 148, or to the Automation Xpress
online help system.
Command-based remote interface commands can also be used to program list mode operation.
Table 56 is an example that shows the SCPI commands that are used to program the 2400/2500 to step
its output power level from 8 to 5 to 0 dBm, while keeping the frequency constant at 5 GHz. The dwell
time, that is, the time spent on each step, is 200 ms. In this example, software triggering is used, and the
sweep mode is set to single-sweep. The last command in the sequence triggers the list.
Table 56 Example of List Mode Operation
Sequence
Command
Description
1
LIST:SEQ:AUTO ON
Activate list mode.
2
LIST:FREQ 5000000000.0,5000000000.0,5000000000.0
Add 3 list points to a list with
frequency 5 GHz.
3
LIST:POW 8.000,5.000,0.000
Set the power for the 3 list
points to 8, 5 and 0 dBm
respectively.
4
LIST:DWEL 0.200000, 0.200000, 0.200000
Set the dwell (step) time for the
3 list points to 0.2 seconds.
5
LIST:PRECompute
Pre-compute the created list
data.
6
LIST:REPeat SWEEP
Set the list repeat type to single
sweep.
7
TRIGger:SOURce BUS
Set the list trigger mode to GPIB
(software) triggering.
8
OUTP ON
Turn the RF output on.
9
*TRG
Trigger the list.