5
8
EXTERNAL CONNECTIONS & CONTROLS
NOTE:
The numbers refer to the callouts in Figure 1.
1.
V
OLUME
C
ONTROL
: Use this control to adjust the headset listen level.
2.
C
HAN
B
UTTON
AND
I
NDICATORS
: The Chan button allows the user to select
which intercom channel is active. Press the Chan button to change the
channel selection. The yellow indicator next to the channel number lights
to show the active channel.
3.
C
ALL
B
UTTON
AND
I
NDICATOR
: The Call function allows the user to send or
receive signals to other devices on the intercom channel selected. The
Call button operates in two ways:
Call receive: When there is an incoming call signal, the indicator is
red. (If Audible Call Alert is enabled, incoming calls will cause beeps
in the headset.) On the NFL-2002, calls can be received on the
selected channel only.
Call send: To send a call signal to all stations on a channel, press and
hold the Call button until a verbal response is received. The indicator
will glow red. On the NFL-2002, calls can be sent on the selected
channel only.
4.
T
ALK
B
UTTON
AND
I
NDICATOR
: The Talk button activates the headset
microphone and operates in two ways:
Latched Mode:
Tap the button once to talk. The indicator will glow green. Tap the
button again when finished with a conversation.
Momentary Mode:
Press and hold the button to talk momentarily. Release the button
when finished talking.
NOTE:
If no headset is connected when the Talk button is pressed, the
Talk button will have the same function as the Chan button.
5.
S
IDETONE
C
ONTROL
: When using a headset, this control adjusts your own
voice level heard in the headphones. To adjust the level, tap the Talk
button once to turn on the headset microphone. Then, use a small flat-
blade screwdriver to increase or decrease your voice level while talking
into the microphone. (This control is accessible by removing one screw of
belt clip.)
6.
H
EADSET
C
ONNECTOR
: This connector accepts a four wire Telex
®
boom-
microphone headset.
CONNECTOR PIN CONFIGURATIONS
Headset Connector
Type: XLR-4M (callout 6 in Figure 1)
Pin 1
Headset microphone low
Pin 2
Headset microphone high
Pin 3
Headphone high
Pin 4
Headphone low
Intercom Channel Connectors
NFL-2002
Type: One XLR-5M (callout 8 in Figure 1)
Audiocom
®
Mode (Internal switch SW1 and set to BAL position)
Pin 1
Common
Pin 2
Local power (21-30 VDC)
Pin 3
Channel A intercom audio low and +24 VDC input
Pin 4
Channel A intercom audio high and +24 VDC input
Pin 5
Channel B intercom audio low and +24 VDC input
Pin 6
Channel B intercom audio high and +24 VDC input
Clear-Com Mode
(Internal switch SW1 and jumpers set to UNBAL position)
Pin 1
Common
Pin 2
Local power (21 to 30 VDC)
Pin 3
Channel A +30 VDC input
Pin 4
Channel A intercom audio/call signal
Pin 5
Channel B +30 VDC input
Pin 6
Channel B intercom audio/call signal
Side Tone Adjustment (R145)
The side tone adjustment is accessible either internally (refer to Figure 2) or by
removing the belt clip mounting screw (callout 5 in Figure 1).
To adjust the level of your own voice heard in the headphones, tap the Talk button once
to turn on the headset microphone. Then, use a small flat-blade screwdriver to increase
or decrease your voice level while talking into the microphone.
Mic Gain Adjustment (R156)
The Mic Gain adjustment is accessible internally on the board (R156), see Figure 2.
To adjust Mic Gain, do the following:
Using a Phillips head screw driver, turn the Mic Gain pot clockwise to increase the gain
(or counter-clockwise to decrease the gain).
Clear-Com Setup
Make the following switch and jumper changes when the beltpack is used with Clear-
Com equipment:
NFL-2002
1.
SW1 must be placed in the UNBAL position.
