Inovonics Wireless Corporation 3B63MB4 User Manual
21
Circuit Board Jumpers, Adjustment Controls, Indicators and Switches
Figure 14. Base Station Circuit Board
Jumpers
J1 and J2
Set for the type of menu sign in the system. Jumper pins 1 and 2 on both jumpers for menu
signs having a speaker only. Jumper pins 2 and 3 on both jumpers for menu signs having a
speaker and a microphone.
signs having a speaker only. Jumper pins 2 and 3 on both jumpers for menu signs having a
speaker and a microphone.
J3
Set to designate the number of the lane in the system. Jumper pins 1 and 2 to select lane 1.
Jumper pins 2 and 3 to select lane 2.
Jumper pins 2 and 3 to select lane 2.
J4
Set for the type of vehicle detector in the system. Jumper pins 1 and 2 for an air switch
detector. Jumper pins 2 and 3 for a loop/sodar detector.
detector. Jumper pins 2 and 3 for a loop/sodar detector.
J5
Set to designate the type of communication operation. Jumper pins 2 and 3 for standard
operation. Jumper pins 1 and 2 for duplex operation.
operation. Jumper pins 1 and 2 for duplex operation.
J6
MENU PWR SEL – STD or DPLX
STD – applies power to outbound speaker amplifiers only when the TALK switch is pressed.
Note: for Standard (half–duplex) operation J6 MUST be placed in the STD position.
DPLX – applies power to outbound speaker amplifiers constantly. This will reduce the click
that is sometimes heard in duplex mode when the TALK button is pressed.
STD – applies power to outbound speaker amplifiers only when the TALK switch is pressed.
Note: for Standard (half–duplex) operation J6 MUST be placed in the STD position.
DPLX – applies power to outbound speaker amplifiers constantly. This will reduce the click
that is sometimes heard in duplex mode when the TALK button is pressed.
J9
TALK MON LVL
REDUCE – reduces the volume to the Monitor Speaker by 16dB while TALK is activated.
This decreases the chance of feedback when a headset is operating near the Monitor Speaker in
duplex mode.
FULL – unreduced volume to monitor speaker in all modes.
REDUCE – reduces the volume to the Monitor Speaker by 16dB while TALK is activated.
This decreases the chance of feedback when a headset is operating near the Monitor Speaker in
duplex mode.
FULL – unreduced volume to monitor speaker in all modes.
*Note
This setting may cause feedback when a headset is operating near the monitor
speaker in duplex mode.
speaker in duplex mode.
J10
SWT THLD – HIGH or NRML
SWT THLD refers to Switch Threshold. This jumper is used to change the dynamic gain
SWT THLD refers to Switch Threshold. This jumper is used to change the dynamic gain