Bogen Tpu 250 Instructions Manual

							Page 11of 12
Operation
IMPORTANT:Before plugging the amplifier into an AC outlet, turn all volume
controls to their full counterclockwise positions.
POWER INDThe POWER IND LED illuminates whenever AC power is applied to the amplifier
(there is no power switch on the amplifier).
PEAK LEVELThe PEAK LEVEL LED illuminates whenever the speaker output signal level
approaches its maximum level. This indicator is used when setting volume levels.
Maximum output level is achieved when the PEAK LEVEL indicator flashes
intermittently on loud peaks of the input signal. If the indicator illuminates steadily,
the output signal volume is set too high and distortion is occurring. Decrease the
volume control for the appropriate input until the indicator flashes only
occassionally.
TEL  VOLUME This control adjusts the level of the telephone page output. Further adjustment can
be made using the PEAK LEVEL indicator described above.
MUSIC  VOLUMEThis control adjusts the level of the background music output.The background music
level should be set to an acceptable level without overdriving the system. When
adjusting this level, the PEAK LEVEL indicator should be observed to ensure that the
amplifier signal is not distorted.
MUSIC MUTEThis control adjusts the level of the background music heard during a paging
announcement. The background music mute level should be set to the customers
satisfaction, but the page announcement must always be easily heard above the
background music.
MIC VOLUME This control adjusts the level of the microphone page output.
CA
UTION:Microphone should not be placed near any paging loudspeakers.
RINGER VOLUMEThis control adjusts the level of the night ringer tone output. The background music
level should be set to the customers satisfaction. When adjusting this level, the
PEAK LEVEL indicator should be used to ensure that the amplifier signal is not
distorted.
APHEXThis control adjusts the amount of Aphex
®Aural Exciter effect mixed in to the page
signal. To use this function, the APHEX switch beneath the input connection cover
must be set to ON. Setting this switch to OFF bypasses the Aphex effect and makes
the control inoperable. With the APHEX switch turned on, make a page and rotate
the control until the audio sounds crisp and clear.
Indicators
Controls 
						

							Page 12 of 12 BASSandTREBLEBass and treble controls are provided to adjust the high frequency and low frequency
response of the paging system. Reference positions are provided for these controls.
When set to these positions, the frequency response of the system will be flat. Set
the controls to the customer’s satisfaction. Clockwise rotation increases (boosts)
the response and counterclockwise reduces (cuts) the response. Increasing bass
and/or treble can cause output signal peaks to increase. Check the PEAK LEVEL
indicator after making bass adjustment and lower the music input volume if excess
peaking occurs.
VOX (Voice Operated) SENSThe VOX SENSitivity control should be set so that only the desired signal is above
the threshold level, while noise or unwanted signal is below it. When an input signal
(such as voice) is detected, the music channel will be muted. To adjust the sensitivity
of this circuit:
1) Rotate the control fully clockwise.While making a page announcement and talking
at a low level, the sound should not be choppy nor missing parts of words. If it is
choppy, or if intelligibility is poor, rotate the control counterclockwise to the point
where the sound is clear and crisp (but not to the maximum counterclockwise
position).
2) If the background music shuts down when no page is in progress, rotate the
control clockwise until the music is restored.
ALCThe  ALC controls the level at which the amplifier will begin to limit the output signal
level.
Manual Output Adjustment Procedure(follow only if minor adjustments to the
reference settings are not adequate)
1) Disable ALC by turning ALC control to the maximum counterclockwise position.
2) Make a page, speaking softly, yet distinctly. Set the TEL VOLUME control to the
desired paging level during this page.
3) Make another page speaking relatively loudly this time. Rotate the ALC control
clockwise, while making the page, until it has the same loudness as the first page.
NO
TE:The TEL Volume and ALC controls work together to set the output level.
NO
TE:The PEAK LEVEL indicator should not show excessive peaking during loud
pages. If this is occurring, the ALC control must be further increased.