Lectronics IFBT4-VHF, Инструкция по эксплуатации

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IFBT4-VHF
LECTROSONICS, INC.
8
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 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.
.375”
to
.475”
typ.
Straight or with
locking collar
Antenna
The ANTENNA connector is a standard 50 ohm BNC
type for use with standard coaxial cabling and remote
antennas.
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.
Switch
Positions Input
Name 1 2 3 4 XLR Pins Balanced Sensitivity
CC
q q q p
3 = Audio No -10 dBu
1 = Common
MIC
p p p q
2 = Hi Yes -42 dBu
3 = Lo
1 = Common
LINE
p p q q
2 = Hi Yes 0 dBu
3 = Lo
1 = Common
RTS1
p q q q
2 = Hi No 0 dBu
1 = Common
RTS2
q q q q
3 = Hi No 0 dBu
1 = Common