Figure 3-22. HX 1V Exciter Front Panel
ITEM FUNCTION
DRIVE POWER MW Displays exciter drive power in milliwatts.
POWER BAR GRAPH Displays power 0-1 watt. Visual power ref. peak sync. Aural power C.W.
METER SELECT Selects Visual or Aural output for display on DRIVE POWER digital display and power bar graph. Will
default to Aural after ac power failure.
VISUAL/AURAL POWER
RAISE/LOWER Momentary switch to raise or lower the exciter output power. This is a two speed control. When first depressed
the power will change slowly, but if it is then held down for approximately 5 seconds the power will change at
a faster rate until released. It will return to the slower rate upon release. The power adjustment commands are
independent of the meter select. Be sure to check metering before making exciter power adjustments to see if
VIS or AUR PWR is being monitored. The controller power fail circuits maintain control for hours after an ac
power outage. During this time the power controls are active and will raise or lower the power if depressed
even though ac is not present.
STATUS LED’s
SECOND CORRECTOR Indicates optional corrector for dual power level is in use.
AURAL MUTE Indicates aural exciter is muted either internally (PLL failure) or externally (MAIN CONTROLLER on/off or
overload.)
VISUAL MUTE Indicates VISUAL exciter is muted either internally (PLL failure) or externally (MAIN CONTROLLER
on/off or overload.)
BOARD BYPASS Indicates one of the correction modules has been left in bypass position.(i.e. VSB, DELAY COMP) Jumpers
are provided on the individual boards to disable its bypass status if a particular board is not needed for normal
operation.
AURAL IF LOCK Illuminated when AURAL PLL is unlocked.
VISUAL IF LOCK Illuminated when VISUAL IF PLL is unlocked.
MASTER LOCK Illuminated when the MASTER PLL is unlocked.
POWER Illuminated when AC power is on. (AC POWER SWITCH/BREAKER IS LOCATED ON BACK PANEL
OF UNIT.)
Table 3-4. HX 1V Exciter Controls and Indicators
3-16 888-2365-001 Rev. B: 1/11/1999
WARNING: Disconnect primary power prior to servicing.
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