SECTION 2
ELECTRICAL ADJUSTMENTS
2.1 SETTING THE INTERNAL JUMPERS
2.1.1 DEFAULT SETTINGS
There are several internal jumpers which modify keypanel
operation. The jumpers are set for the following default
operations:
J201 The EXT LINE IN signal (KP-96-RC option
only) is muted when any
Talk
key is pressed.
J202 The speaker (or headphones) are muted by
15 dB when any
Talk
key is pressed.
J203 Continuous sidetone (When using a headset,
the keypanel operator’s own voice will be
heard at all times in their headphones.)
J401 The microphone is automatically activated
when any
Talk
key is pressed.
J402 Normal/test switch set for normal operation.
J403 The MIC PRE OUT signal (KP-96-RC
option only) is activated only when any
Talk
key is pressed.
J404-J406 The keypanel is configured for operation
with the standard dynamic, -70dB, 150-ohm
gooseneck microphone.
To reset any of the jumpers, remove the top cover from
the keypanel. Locations of the jumpers are shown in
Figure 2-1. The following paragraphs describe the
alternative settings for the jumpers.
2.1.2 J201 (EXTERNAL INPUT MUTING)
This jumper is only significant in KP96 and KP97 Series
Keypanels that have the KP-96-RC Rear Connector Plate
option installed. When pins 2 and 3 are shorted, a signal
input at the EXT LINE IN connector is muted when any
Talk
key is pressed. When pins 1 and 2 are shorted, the
signal is not muted during
Talk
key activation.
2.1.3 J202 (SPEAKER/HDST MUTE)
When pins 1 and 2 are shorted, the speaker/headset signal
is fully muted when any
Talk
keys are pressed. When
pins 2 and 3 are shorted, the signal is muted by 15 dB
when any
Talk
keys are pressed.
2.1.4 J203 (SIDETONE MUTING)
When pins 1 and 2 are shorted, the sidetone signal is
always on. When pins 2 and 3 are shorted, the sidetone
signal is on only when a
Talk
key is pressed.
2.1.5 J401 (OUTPUT ENABLE)
When the jumper is installed, the microphone is on only
when any
Talk
key is pressed. When the jumper is
removed, the microphone will always be on.
2.1.6 J402 (BALANCE TEST)
For normal operation, there should be no jumper installed.
This jumper is used when adjusting the keypanel audio
levels. See Balance Adjustment, page 2-3.
2.1.7 J403 (PREAMP OUT)
This jumper is only significant in KP96 and KP97 Series
Keypanels that have the KP-96-RC Rear Connector Plate
option installed. When pins 1 and 2 are shorted, the mic
signal at the MIC PRE OUT connector is switched on
and off by the
Talk
keys. When pins 2 and 3 are shorted,
the mic signal at the MIC PRE OUT connector is always
on.
2.1.8 J404-J406 (PANEL MIC SELECTION)
These jumpers work together to configure the panel
microphone preamp for various types of microphones as
follows:
2-Wire Electret:
J404 Pins 1 and 2 shorted
J405 No jumper
J406 No jumper
3-Wire Electret:
J404 No jumper
J405 No jumper
J406 No jumper
Balanced Dynamic (-70 dB, 150 ohms):
J404 Pins 2 and 3 shorted
J405 Pins 1 and 2 shorted
J406 Pins 1 and 2 shorted
KP95/96/97 Keypanel Installation
2-1
(58 strony)
(22 strony)
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