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June 10th 05, 02:26 AM
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IMD should be expressed referencing a single tone of a two tone test signal. That is the way most tube manufacturers do it. Some of the radio manufacturers reference IMD to PEP which makes it look like the IMD is 6 db further down! The PEP of a transmitter is 6 db higher than either tone of a two tone signal. If the IMD is 30 db below the level of one tone of a two tone signal then it will be 36 db below PEP. 73 Gary K4FMX Poorly expressed on my part. Thanks for the correction. W4ZCB |
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