Program Interrupt DIP Switches
Each intercom channel has a dedicated program input. These can be used to feed
background music, mix-minus audio (for broadcasting usage) etc. to the intercom
channels. If external program sources will be connected to the EMS4000, you have a
choice of whether or not you want the program audio to interrupt (shut off) on the in-
tercom channel while the MS2000A/EMS4000 station operator is talking.
Audiocom Call Send and Receive DIP Switches
By default, all channels of the EMS4000 can send and receive Audiocom call sig-
nals. You can disable call send or call receive capability for selected channels if de-
sired.
Balanced/Unbalanced Switches
The switches are located on the back panel ( SW2) and internal (S200 & S600).
These switches must be set to the balanced (BAL) position for use with an
Audiocom Intercom System. Set the switches to the unbalanced (UNBAL) position
when using the MS2000A / EMS4000 with a Clear-Com Intercom System. All
switches must be set the same.
Direct Program Listen Enable / Disable Jumpers
By default, each program input can be heard by intercom stations on the correspond-
ing intercom channel. (This can be turned on or off for each program input via the
MS2000 front panel programming. See "Turning the Program Inputs On and Off" in
the Operation section of the MS2000 User Instructions.) Additionally, all program
signals can be heard directly in the MS2000 speaker or headset, and each program is
output at the corresponding speaker jack on the back of the EMS4000. To disable di-
rect program listening for a program input, reset the appropriate jumper as shown in
Table
2
. Locations of the jumpers are shown in Figure
2
, page
6
.
9
Jumper
Description
Settings for All Jumpers
J15
Program 3 direct to Headset or Speaker
Pins 2&3 Shorted: Enable
Pins 1&2 Shorted: Disable
J16
Program 4 direct to Headset or Speaker
J18
Program 5 direct to Headset or Speaker
J21
Program 6 direct to Headset or Speaker
Table 2. Direct Program Listen Enable / Disable Jumpers
