Olson Technology OTM-4000 - Manual (Page 5)

025-000331 REV B Page 5
4.) FRONT PANEL CONTROLS AND INDICATORS
REMOTE
When an OTM-4000 is equipped with the optional remote control feature, this LED when on,
indicates that the OTM-4000 is in the remote control mode.
UNLOCKED
This LED when on, indicates that one of the digital synthesizers is not locked. This condition will result
in shutdown of the RF output as long as the condition exists. Note that this LED will usually flash on
momentarily when changing a channel or frequency. This momentary shutdown of the output prevents
undesired interference to other channels if the OTM-4000 is connected to a system or network when
it’s channel is changed.
VIDEO LEVEL
This control adjusts the video depth-of-modulation. Choose a bright scene (commercials are usually
excellent) and set it carefully while observing the VIDEO O/M LED. This control should be advanced
to a point JUST SHORT of where the VIDEO O/M LED flashes-on.
VIDEO O/M
This LED, when on, indicates a depth-of-modulation greater than 87-1/2%. It should never be on
continuously but might be on for short periods during bright scenes. See VIDEO LEVEL above.
This LED will stay on for several seconds when power is first applied to the OTM-4000.
AUDIO LEVEL
This control adjusts the audio deviation of the OTM-4000. Choose program material that is of high
average volume when setting this control and adjust it so the AUDIO O/M LED just blinks-on during
program audio level peaks.
AUDIO O/M
This LED, when on, indicates that the peak deviation of the OTM-4000 is at
±
25KHz. It should
only flash-on occasionally during normal operation. See AUDIO LEVEL, above.
A/V
This control adjusts the aural carrier level relative to the video carrier level. It is typically adjusted for
an A/V ratio of 15-17dB.
LEFT, RIGHT, UP, DOWN, ENTER
These buttons are used in selecting and changing menu items as displayed on the LCD panel.
CONTRAST
This control adjusts the LCD panel contrast. Adjust it for best display legibility when the OTM-4000
is placed in operation.
AUX IF
This LED, when on, indicates that the current IF source is the AUX input at the rear panel.