When connecting a TPA Amplifier to an unused CO trunk port, install as shown using an RPS-2406 power supply to provide talk battery to the CO port.
Figure 4.
OPERATION:
(See Figure 5.)
Figure 5: Front Panel Indicators And Controls
POWER (INDICATOR):
The green LED will light when the AC cord is plugged into a 120 VAC source.
PAGE (LEVEL CONTROL):
The Page level is used to adjust the volume of both the microphone and telephone inputs. Turn the control shaft clockwise to
increase volume and counterclockwise to decrease volume.
MIC & TEL (LEVEL CONTROLS):
Access to these controls is from the bottom of the unit. The MIC level control is set at the factory in the minimum
position. The TEL level control is set at the factory in its maximum position. If no microphone is used in the system, there is no need to change these
control settings.
However, should a microphone be used, comply with the following procedure:
1.
Adjust the Page level control (on the amplifier front) clockwise to its middle position.
2.
Adjust the MIC level control clockwise to attain the desired sound level while speaking into the microphone.
3.
Switch the microphone off and make a telephone page.
4.
Adjust the TEL level control counterclockwise to match the sound level of the microphone for the same setting of the PAGE control.
NOTE: This is a one time adjustment for specific microphone and telephone inputs.
MUSIC LEVEL:
The Music control is used to adjust the volume of the background music source. Turn clockwise to increase volume and
counterclockwise to decrease volume.
NOTE:
The background music level should be kept at a lower level than the page level.
MUSIC MUTE:
Music is automatically muted when paging. After completion of the paging message the music will gradually return to its original level.
Note that pausing for too long a period while making an announcement may result in the gradual return of music, until speaking again.
P81782 G
Sheet 3 of 4
TONE LEVEL:
Use the Tone control to adjust the tonal balance of the output signal. The amplifier frequency response is flat with the tone level in the
maximum clockwise position.
PEAK INDICATOR:
Flickering of the LED at maximum levels is a proper indicator of the amplifier level. If the LED stays on permanently, this should be a
sign that an overdrive condition exists.
HORN PROTECT/LO-CUT:
This switch is located on the amplifier apron. Turn the switch ON whenever HORNS are used in the system. This will protect
the horns from damage from low frequencies.