Rear Panelcontrols And Functions; Ifbt4-Vhf Rear Panel; Xlr Jack; Power Input Connector - Lectronics IFBT4/E01-VHF Instruction Manual

IFBT4-VHF, IFBT4/E01-VHF, IFBT4-VHF/X
Rear Panel
Controls and Functions

IFBT4-VHF 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 indi-
vidual switches. For detailed information on the setting
of these switches see the Installation and Operation
section.

Power Input Connector

The IFBT4 is designed to be used with the CH20
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. Lectro-
sonics 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.
8
Input Configuration (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.
Name
CC
MIC
LINE
RTS1
RTS2
Straight or with
locking collar
Switch
Positions
1 2 3 4 XLR Pins
q q q p
3 = Audio
1 = Common
p p p q
2 = Hi
3 = Lo
1 = Common
p p q q
2 = Hi
3 = Lo
1 = Common
p q q q
2 = Hi
1 = Common
q q q q
3 = Hi
1 = Common
LECTROSONICS, INC.
Input
Balanced Sensitivity
No -10 dBu
Yes -42 dBu
Yes 0 dBu
No 0 dBu
No 0 dBu