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6
Installation
• Connect the IFB program audio source to the
intercom port that you defined as the program
input port of the matrix (in step 4) and connect
the IFB program audio source to the direct
program input of the selected channel of the
IFB-828.
10. Connect the appropriate 3-pin XLR output
connector of the IFB-828 to the LINE (or LINES)
connector of the IFB belt pack. Typical cable
wiring is shown in Figure 2.
NOTE: In the factory default configuration, the
IFB-325 belt packs receive IFB audio on
pin 3 of its XLR connector. In this
configuration, the belt pack’s internal
shorting plug J3 is set to pins 2 and 3
shorted. This is NOT the correct
configuration for use with the IFB-828. To
change the setting open the belt pack and
reset the H3 shorting plug so that pins 4
and 5 are shorted. Refer to your IFB-325
manual for further information.
11. Connect an earset to the IFB belt pack.
NOTE: The Model IFB-325 accepts only
monaural earsets. The Models 4020 and
4030 accept either monaural or stereo
earsets. However, for the standard
application of the IFB-828, only a
monaural earset is required.
12. Set all belt pack volume controls and all level
controls on the IFB-828 to minimum.
13. Plug in the IFB-828 power cord.
The main power LED on the front panel should
light, and each channel LED lights indicating
power is being supplied to the belt pack output on
that channel. Verify the matrix is operational and
that all program sources are operational.
14. During normal operation (no IFB interrupts
activated), have each talent position adjust their
belt pack volume control for a comfortable
program listening level. (Use the INTERRUPT
control on a model 4020 or 4030 belt pack.)
15. For each IFB:
• Activate the keypanel key assigned to the IFB.
The program audio should be interrupted at the
associated IFB belt pack, and the mic audio
from the keypanel should become audible.
• While the IFB key is activated, adjust the
appropriate level control on the front panel of
the IFB-828 to mix the desired amount of
direct program audio back into the keypanel’s
mic audio signal.
When the IFB key is released, the mic audio
should cut off, and the normal program audio
should be restored.
Monaural Earset Pin Out
Tip: IFB Audio & Direct Program Mix
Sleeve: Common
Stereo Earset Pin Out
Tip: IFB Audio & Direct Program Mix (Interrupt)
Ring: Direct Program Audio (Non-Interrupt
Sleeve: Common
TABLE 1. Input Connector Pin Out (J9)
Pin Numbers
Description
+ Input - Input
1 26 Channel 1 direct program input
2 27 Channel 1 IFB input (from Matrix)
3 28 No Connection
4 29 Channel 2 direct program input
5 30 Channel 2 IFB input (from Matrix)
6 31 No Connection
7 32 Channel 3 direct program input
8 33 Channel 3 IFB input (from Matrix)
9 34 No Connection
10 35 Channel 4 direct program input
11 36 Channel 4 IFB input (from Matrix)
12 37 No Connection
13 38 Channel 5 direct program input
14 39 Channel 5 IFB input (from Matrix)
15 40 No Connection
16 41 Channel 6 direct program input
17 42 Channel 6 IFB input (from Matrix)
18 43 No Connection
19 44 Channel 7 direct program input
20 45 Channel 7 IFB input (from Matrix)
21 46 No Connection
22 47 Channel 8 direct program input
23 48 Channel 8 IFB input (from Matrix)
24 49 No Connection
25 50 No Connection