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Efficiency Test of IOT transmitter

Document #:
Project X-doc-927-v2
Document type:
technical note
Submitted by:
Ralph J. Pasquinelli
Updated by:
Ralph J. Pasquinelli
Document Created:
12 Sep 2011, 13:50
Contents Revised:
12 Sep 2011, 14:03
Metadata Revised:
12 Sep 2011, 14:03
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Project X-doc-927-v1
12 Sep 2011, 13:50
Attached are the test results from an efficiency test on the V2 E2V 30 KW IOT and transmitter plus Ferrite circulator. 480 VAC was monitored with a Fluke power energy analyzer directly attached to the mains input on the transmitter. AC power measured does not include power for the solid-state driver amplifiers, but does include fans, filaments, bias supplies, ion pump, controls, etc that are part of the main transmitter cabinet. RF power was measured with Agilent power meters. Calibrations of all couplers were done to an accuracy of 0.1 dB and these values were entered as offsets to the meters. An Agilent network analyzer was used to tune up the input and output cavities and coupling loops. Before the data was taken, an efficiency exceeding 50% AC to RF was tuned. Figure 1 shows a photo of the transmitter and circulator. At 30 KW, 6-1/8 inch coax is required. Initially loads are attached to both ports 2 and 3 of the circulator. A short circuit was then installed on port 2 of the circulator to reflect power to the load on port 3.
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IOT efficiency
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