HP 83620A, 24A, 22A manual FM Modulation, Figure M-3. FM Deviation and Rate Limits, User’s

FM Modulation

The FM rate can be decreased as long as the FM deviation remains less than n x 5 x FM rate and less than 8 MHz.

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Figure M-3. FM Deviation and Rate Limits

If the FM deviation is set greater than the 8 MHz limit, it must be decreased for specified performance. An W:‘Ef?tKlD message is displayed on the message line if the FM deviation exceeds

n x 5 x FM rate. Then, either decrease the FM deviation or increase the FM rate until both conditions for FM deviation are met.

At FM rate levels greater than those shown for each band corresponding to the 8 MHz FM deviation level, the n x 5 x FM rate value will always be greater than 8 MHz so the maximum FM deviation is no longer limited by the FM rate, only by the maximum limit of 8 MHz.

M-18 Operating and Programming Reference	HP 8360
User’s	Handbook