Rev. 1.0
FMX30/FMX100/FMX250 User’s Manual
3—2
These steps summarize the operating procedures you should use for the initial
operation of the transmitter. More detailed information follows.
Before operating the transmitter, take time to become familiar with the controls
and indicators.
3.2.1
Front Panel
l
Audio Processor Input Display
Two vertical, bar graphs for the left and right
channels indicate the relative audio levels, in 1.5 dB steps, at the input of the audio
processor. Under normal operating conditions, the left and right Audio Processor
indicators will be active, indicating the relative audio input level after the input
sensitivity setting. During program pauses, the red Low LED will light.
Modulation DisplayA 20–segment, vertical peak-and-hold, bar graph displays the
peak modulation percentage. A reading of “100” coincides with 75 kHz deviation.
The display holds briefly (about 0.1 seconds) after the peak. The “Pilot” indicator
illuminates when the transmitter is in the stereo mode.
To verify the actual (or more precise) modulation percentage, connect a certified
modulation monitor to the RF monitor jack on the rear panel.
Caution
Possible equipment damage!
Before operat
ing t
he transmitter for the
first time, check for the proper AC line
voltage sett
ing and f
requency selection
as described in Section 2.2 and 2.
3.
Illustration 3–1 Front Controls
Carrier
Switch
Main
Power
Switch
Control
Knob
Audio
Monitor
Status Indicator Ring
Modulation
Display
Main Display
Audio Processor
Input
