HP 8360 B Series User Manual page 271

FM Modulation
M-18 Operating and Programming Reference
The maximum FM deviation is limited by the following two
conditions:
Maximum FM deviation must be less than 8 MHz
l
Maximum FM deviation must be less than n x 5 x FM rate
l
(refer to the "Frequency Bands" specification for the value of n).
The following chart shows the limits of each band given these two
conditions.
For example, in band 1 at a 1 MHz FM rate, the FM deviation must
be less than 5 MHz.
n (1) x 5 x FM Rate (1 MHz) = 5 MHz.
The FM rate can be decreased as long as the FM deviation remains
less than n x 5 x FM rate
1 0
9
- 7
5
4
1
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
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
and
less than 8 MHz.
F M R a t e
and
message is