Rear Panel Controls And Functions; Ifbt4 Rear Panel; Xlr Jack; Mode Switches - Lectrosonics IFBT4/X Instruction Manual

Rear Panel Controls and Functions

IFBT4 Rear Panel

XLR Jack

A standard XLR female jack accepts a variety of input
sources depending on the setting of the rear panel MODE
switches. XLR pin functions can be changed to suit
the source depending on the positions of the individual
switches. For detailed information on the setting of these
switches see the Installation and Operation section.

MODE Switches

The MODE switches allow the IFBT4 to accommodate
a variety of input source levels by changing the input
sensitivity and the pin functions of the input XLR jack.
Marked on the rear panel are the most common set-
tings. Each setting is detailed below. Switches 1 and
2 adjust the XLR pin functions while switches 3 and 4
adjust the input sensitivity.
Switch
Positions
Name 1 2 3 4 XLR Pins
q q q p
CC 3 = Audio
1 = Common
p p p q
MIC 2 = Hi
3 = Lo
1 = Common
p p q q
LINE 2 = Hi
3 = Lo
1 = Common
p q q q
RTS1 2 = Hi
1 = Common
q q q q
RTS2 3 = Hi
1 = Common
Rio Rancho, NM
Input
Balanced Sensitivity
No -10 dBu
Yes -42 dBu
Yes 0 dBu
No 0 dBu
No 0 dBu
Multi-Frequency IFB Transmitter

Power Input Connector

The IFBT4 is designed to be used with the DCR12/A5U
external (or equivalent) power source. The nominal
voltage to operate the unit is 12 VDC, although it will
operate at voltages as low as 6 VDC and as high as 18
VDC. External power sources must be able to supply
200 mA continuously.
The connector dimensions are shown below. Lectroson-
ics P/N 21425 has a straight back shell. P/N 21586 has
a locking collar.

Antenna

The ANTENNA connector is a standard 50 ohm BNC
type for use with standard coaxial cabling and remote
antennas.
Straight or with
locking collar
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