7
AM Series
Instruction Manual
Operating Controls
All operating controls and indicators for the modulator are located on, or are accessible from the front panel.
Controls and Connections
[1]
EAS/ALT INDICATOR:
Lights Red when EAS/ALT is active.
[2]
VIDEO OVERMODULATION LED:
Lights when modulation is above 87.5%.
[3]
VIDEO MODULATION LEVEL:
Adjusts percentage of modulation.
[4]
AURAL-TO-VISUAL CARRIER RATIO:
Controls amplitude of aural RF carrier relative to visual RF carrier.
[5]
AUDIO MODULATION LEVEL:
Adjusts aural carrier modulation.
[6]
AUDIO OVERMODULATION LED:
Lights when peak deviation of aural carrier is over 25 kHz.
[7]
DISPLAY
MODE BUTTON:
Used to scroll through channel configuration, output level and modes.
[8]
CHANNEL,
CHANNEL CONFIGURATION/OUTPUT LEVEL DISPLAY
[9]
UP/DOWN BUTTONS:
Used to scroll through the channel, and channel configuration/output display
.
[10]
ENTER BUTTON:
Evokes the current settings in the channel/output display when depressed.
[11]
STEREO INDICATOR:
Green LED lights when equipped with stereo option (AM Opt 5), the audio
select switch (on rear panel) in the stereo position and video is applied to the modulator.
Note:
All connections to the unit are made at the rear panel.
Figure 2 - Rear Panel
Figure 1 - Front Panel
[1]
RF OUTPUT:
+ 60 dBmV RF output
[2]
IF INPUT:
+35 dBmV IF Input
[3]
EAS/ALT IF INPUT:
Emergency Alert or Alternate IF Input
[4]
IF OUT:
+35 dBmV IF Output (See note #10 below)
[5]
EAS/ALT IF TERMINAL:
EAS / ALT IF mode selection (See page 9)
[6]
BALANCED AUDIO INPUT:
Balanced Audio Input (Option 9 units only)
[7]
AUDIO INPUT:
Audio input (standard)
[8]
VIDEO AGC ON/OFF:
Video AGC switch (Option 7 units only)
[9]
VIDEO INPUT:
1 Volt PP video input
[10]
IF LOOP CABLE:
The IF loop cable (supplied) must be installed to provide RF continuity. The modulator will
not have an RF output without the IF loop installed.
[1]
[1]
[2]
[3]
[4]
[5]
[10]
[6]
[7]
[8] [9]
[11]
[2] [3] [4] [5] [6]
[7]
[8]
[9]
[10]
