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Switching between pulsed and continuous wave (CW) RF
Switching between a pulsed RF mode (2e, for example) and a mode using continuous-wave (CW) RF mode (1f, for example) requires certain changes to be made to the PSM on the DAQ webpage (isdaq01.triumf.ca:8081/?exp=bnmr), as well as on the platform itself.
When working with pulsed RF, the first thing to do is go to the PSM page and: (1)set "All profiles enabled" to "y" for yes, (2)set each of the enable profiles 1f, 3f, 5f, and fREF all to "n" for no, (3) set enable quadrature mode to "y", and (4) set the "scale factor" to is maximum value of 255. It should look like the below picture on the webpage. Then pulse type and bandwidth can be selected on the "IQ modulation" (see picture of PSM page)(5)
Once these have been values have been set, you must remove the attenuation (ie: have all switches on the attenuation box set to "off") that is located on the platform. This small box is located near the bottom of the RF rack, which is the very first rack on the left when opening the platform cage (see picture).
When going from pulsed to CW, the PSM should be changed that only "1f profile enable" is set to yes, and quadrature and "all profiles" disabled (ie: set to no). Also the attenuation (approx. 10 dB) should be applied using the attenuation box pictured.
Page last modified: 07/23/09 02:46 by Andrew MacFarlane.