IPE2500A and IPE2500A-MLS Paging Encoder/Desktop Controller
Installation
49
03/12
PB2 - Line-In Sensitivity
After entering the main programming selection mode, press the
PB2
button to allow adjustment of the
line-in sensitivity. This adjustment allows the desk set to compensate for a range of 0 to 15 dB of line
loss in 3-dB increments. The compensation is considered a pre-gain to the line-in circuitry of the desk
set.
For example, if the RX audio output of the radio tone panel or ITA2000 is 0 dBm, and the telephone
system has 10 dB of line loss, the desk set line input sensitivity should be set to level 4 (
−
9 dBm) to
accommodate the 10 dB of incurred line loss.
After pressing the
PB2
, the display indicates the current line-in setting. The buttons function as follows:
Button
Line-in Sensitivity Mode Function:
VOLUME
Up
Decreases the line-in sensitivity or reduces the pre-gain for the line input.
VOLUME
Down Increases the line-in sensitivity or increases the pre-gain for the line input line.
TRANSMIT
Saves the current setting and exits back to the main selection mode.
MONITOR
Restores the previously programmed setting.
IC
Exits the line-in sensitivity mode without saving the selection, but maintains the
current setting until the power to the unit is cycled. This is useful for experimenting
with different settings.
Summary of Contents for IPE2500A
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Page 73: ...67 03 12 Schematics...
Page 80: ...Schematics IPE2500A and IPE2500A MLS Paging Encoder Desktop Controller 74 Schematic Sheet 7...
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