PSA Setup as Downconverter with 89640/89641
This system uses the 89640 or 89641 VSA and the Keysight PSA used as an external downconverter. The 321.4 MHz Megahertz: A unit of frequency equal to one million hertz or cycles per second. IF output from the PSA is input to the 89640/89641 running the 89600 VSA software. This system used a PSA as a downconverter that does not have option H70 or HY7 (70 MHz IF Output). This product is not an integrated system; the 89600 software does not control the PSA. This topic includes setup and measurement information required to successfully make measurements using the PSA used as a downconverter with the 89640/41 VSA, including:
Other Supporting Documentation
Test Setup (cable connections)
Configure the 89640/89641 analyzer
When you use the PSA as a downconverter with the 89640/89641, the PSA must be controlled from its front panel or programmatically. The 89600 software does not control the PSA in this configuration.
Other Supporting Documentation
Configuration, Measurement, and Performance Information
For detailed performance and measurement information, see the appropriate technical overview linked from the Product Literature topic.
For configuration information, see the Configuration Guide linked from the Product Literature topic.
PSA analyzer documentation
For detailed information about the PSA, see the printed documentation shipped with that analyzer.
PSA System Requirements
This system requires an Keysight PSA (models: E4440A, E4443A, E4445A, E4446A or E4448A) with firmware version A.02.01 or later.
The 321.4 MHz IF output is not available for the E4447A.
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GPIB/LAN/USB Setup
In this configuration, the 89600 VSA can control the setup of the PSA via a direct GPIB connection, a point-to-point LAN Local Area Network: A communications network that serves users within a local geographical area, typically over distances of around 100m. Wireless LANs use wireless communicaitons to network devices so there is no need for data cabling. or network connection, or a USB connection.
Instructions for configuring the these interfaces are in the Software Installation Guide.
The highest performance interface is a USB connection. Live Input-Output operations and recording transfers are noticeably faster.
Custom Input Channel Configurations:When using the Input Channel Configuration dialog to specify or modify the input channel configuration mapping, only the VSA default set of channel configuration mappings are allowed; "invalid" channel configuration mappings are disallowed and the "" button is disabled "greyed out".
Measurement Setup procedure
This procedure will setup and configure the 89640/41 VSA and PSA for the PSA Setup as Downconverter with 89640/89641 system
- Test Setup (cable connections)
Connect the cables between the PSA and 89640/98641 as shown in the 89640 and 89641 Hardware Setup help. Because the PSA has the more stable external reference signal, it's recommended that the 10 MHz Ref Out from the PSA is connected to the Ref In on the 89605B module.
- Configure
the 89640/89641
The signal must be inverted. The IF output signal from the PSA is an inverted spectrum. There are two ways to compensate:
Click Check the Frequency Converter and Spectrum check boxes.
or
Click and check the Mirror Frequency check box.
- Configure the PSA
- Specify Spectrum mode.
- Specify ZeroSpan mode.
- Set to the correct range and center frequency.
- Specify single sweep mode by pressing Single. Whenever the center frequency or range of the PSA is changed, Single must be pressed again before the change takes effect.
