The example file MultitoneExample_SimpleRecallAndPlay.vi was created using LabVIEW 2015. It loads an N7621B Multitone Distortion setting file and then downloads and plays the signal. The setting file contains both a Multitone and NPR signal. The signal is generated at 1 GHz RF. You can find the LabVIEW example file at:
C:\Users\Public\Public Documents\Keysight\Multitone Distortion\ApiExamples\LabVIEW\MultitoneExample_SimpleRecallAndPlay.vi
Here is a view of the LabVIEW virtual instrument (VI):
The user can set the following properties in the LabVIEW VI:
Signal Generator IQ Inputs – The signal input source.
InternalArb – Uses the arb inside the signal generator (PSG, ESG, MXG, EXG).
ExternalArb – Uses the External IQ inputs on the signal generator (PSG, ESG, MXG, EXG).
WidebandArb – Uses the Wideband IQ inputs (option 016) on the PSG signal generator.
ArbOnly – Use the N8241A, N6030A, M9330A or M8190A Arb to generate the signal.
The example works for InternalArb, ExternalArb and WidebandArb.
The example will also work for ArbOnly when the Arb is an M8190A.
Signal Generator Address – This is the address used to connect to the signal generator.
The connection can be made using LAN, GPIB or USB.
TCPIP0::192.168.0.1::INSTR
GPIB0::19::INSTR
This property must be set for InternalArb, ExternalArb and WidebandArb.
It is ignored when using ArbOnly.
Arb Address – This is the Arb address when using a separate Arb.
The connection can be made using LAN or PXI depending on the Arb
TCPIP0::192.168.0.1::INSTR
The property must be set when using ExternalArb, WidebandArb or ArbOnly.
Signal Analyzer Address – This is the address used to connect to the signal analyzer.
The connection can be made using LAN, GPIB or USB.
TCPIP0::192.168.0.2::INSTR
GPIB0::18::INSTR
This property must be set when Corrections are enabled.
Leave empty to NOT configure a Signal Analyzer as part of the system.
Arb is an M8190A – When true the separate Arb is an M8190A.
This property must be set when configured for ExternalArb, WidebandArb or ArbOnly mode.
The default is false.
Current Measurement Mode – Select signal type Multitone or NPR.
This property must be set and defaults to Multitone.
Corrections Enable – Enable corrections when a Signal Analyzer Address is set.
This property must be set and defaults to false.
Setting File – This is the N7621B Multitone setting file to be opened then downloaded and played.
It uses a default setting file “DefaultMTandNPRforLabVIEW.mtd” in this directory. This file can be opened using the N7621B GUI for further inspection.
The Multitone Signal contains 8 tones spaced 1 MHz apart.
Here is the Multitone signal at 1 GHz.
Here is the same multitone signal after corrections. Note the reduced IMD products.
The NPR Signal is 80 MHz wide with a 1% notch (800 kHz) in the center.
Here is the NPR signal at 1 GHz.
Here is the same signal with corrections enabled. Note the RF flatness and notch depth improvement.
