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E-2

The nominal deviation determines the FM deviation which arises with the preemphasis
switched off if a sinusoidal signal with the frequency of 500 Hz and a level corresponding
to the nominal input level (see the "Input level" section) is fed into the AF input.

You can modify the FM deviation by varying the input level (with an unchanged setting for
the nominal input level) or by varying the setting for the nominal deviation.

The deviation should never be increased by increasing the input level since this will de-
crease the drive reserve (see "Permissible input level"), producing a risk of clipping the sig-
nal. 

Instead, the nominal input level should be set equal to the current input level and the devi-
ation should be increased by increasing the setting for the nominal deviation.

Carrier 1/Carrier 2

Used to set the mode for FM sound subcarrier 1 or 2; the following set-
tings are possible:
– Carrier OFF: Switches off the sound subcarrier 
– Modulation OFF: Switches on the sound subcarrier without modula-

tion

– ON: Switches on the sound subcarrier with modulation

Nom. Deviation 
[Carrier 1/Carrier 2]

Used to set the nominal FM deviation for sound subcarrier 1 and 2

Deviation Limiter

Used to switch the deviation limiter for the FM sound subcarrier on or off

Limiter Threshold

Used to set a threshold at which the deviation limiter is triggered

Warning Above

Used to set a threshold at which the deviation limiter warning is acti-
vated

Current Deviation 
[Carrier 1/Carrier 2]

Indicates the current FM deviation for sound subcarrier 1 and 2

Limitation 
[Carrier 1/Carrier 2]

Status display which indicates whether the deviation limiter has trig-
gered