This menu contains an external FM status window
that shows the current menu selections and the
measured FM Deviation. (The FM deviation meas-
urement function measures the voltage of the exter-
nal modulation signal and calculates the peak
frequency deviation.) This menu lets you perform
the following:
Turn FM on/off.
Set the FM sensitivity.
Select the input impedance (600
Ω
or 50
Ω
) of
the input connector.
Select the input connector (front panel or rear
panel
FM IN
) that is connected to the external
signal source.
Press
On / Off
to turn FM on and off. Both the FM
status display and FM modulation status area will
reflect your selection.
Press
Edit Sens
to open the FM Sensitivity pa-
rameter, then edit the current value using the cur-
sor control key or rotary data knob or enter a new
value using the keypad and the appropriate termi-
nator key. The FM Sensitivity range is
±
1 kHz/V to
±
20 MHz/V for Locked and Unlocked Narrow FM
modes and
±
100 kHz/V to
±
100 MHz/V for Unlocked
Wide FM mode. To close the open FM Sensitivity pa-
rameter, press
Edit Sens
or make another menu se-
lection.
Press
600
Ω
/50
Ω
to select the input impedance of
the input connector. The FM status display will re-
flect your selection.
Press
Front/Rear
to select the front or rear panel
FM IN
connector. The FM status display will reflect
your selection.
LOCAL (FRONT
SIGNAL
PANEL) OPERATION
MODULATION
ERR
This error message is displayed
when the external FM modulating
signal exceeds the input voltage
range. The message “
Reduce FM
Input Level
” also appears at the bot-
tom of the FM status display. FM is
turned off until the modulating sig-
nal is within the input voltage
range.
3-64
681XXB OM
