Lectrosonics IFBT4/E01-VHF Bedienungsanleitung

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This guide is intended to assist with

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Digital Hybrid Wireless®

US Patent 7,225,135

IFBT4-VHF Transmitter

IFBT4-VHF, IFBT4/E01-VHF, IFBT4-VHF/X

25 July 2019

LECTROSONICS, INC.2

Front Panel Controls and Functions

IFBT4 VHF Front Panel

OFF/TUNE/XMIT Switch

OFF Turns the unit off.

TUNE Allows all functions of the transmitter to be set up, without transmitting.

The operating frequency may be selected only in this mode.

XMIT Normal operating position. The operating frequency may not be

changed in this mode, though other settings may be changed, as long

as the unit isn’t “Locked.”

Power Up Sequence

When power is ﬁrst turned on, the front panel LCD display steps through the

following sequence.

1. Displays Model number (e.g. IFBT4 VHF).

2. Displays installed ﬁrmware version number (e.g. V1.00).

3. Displays the current compatibility mode setting (e.g. COMPAT IFB).

4. Displays the Main Window.

Main Window

The Main window is dominated by an audio level meter,

XMIT Mode

which displays the current audio modulation level in real

time. In TUNE mode, a blinking capital “T” is displayed

in the lower left corner to remind the user that the unit is

not yet transmitting. In XMIT mode, the blinking “T” is

replaced by an antenna icon.

Audio limiting is indicated when the audio bargraph

Audio Limiting

extends all the way to the right and widens some-

what.

The Up and Down buttons are disabled in this Win-

dow, but they will display voltage (e.g. 15.4 VOLTS).

www.lectrosonics.com 3

Frequency Window

When in TUNE mode, pressing the MENU button once navigates to the Fre-

quency window. The Frequency window displays the current operating frequency

in MHz, as well as the standard Lectrosonics hex code for use with receivers

equipped with hex switches.

In TUNE mode, the Up and Down buttons may be used to select a new fre-

quency.

The Up and Down buttons navigate in 175 kHz increments. Holding the MENU

button+Up and MENU+Down move 2.8 MHz at a time.

Pressing and holding the Up or Down button invokes an autorepeat function, for

faster tuning.

In XMIT mode, it is not possible to change the operating frequency.

Audio Input Gain Window

Pressing the MENU button once from the Frequency window navigates to the

Audio Input Gain window. This window greatly resembles the Main window, with

the exception that the current audio input gain setting is displayed in the upper left

corner. The Up and Down buttons may be used to alter the setting while reading

the realtime audio meter to set the input level accurately.

The gain range is -18 dB to +24 dB with 0 dB as nominal. The reference for this

control can be changed with the rear panel MODE switches. See page 6 for more

information on the MODE switches.

Setup Window

Pressing the MENU button once from the Audio Input Gain window navigates

to the Setup window. This window contains a menu which permits access to

various setup screens.

Initially the active menu item is EXIT. Pressing the Up and Down keys permits

navigation among the remaining menu items: COMPAT and ROLLOFF.

Pressing the MENU button selects the current menu item. Selecting EXIT navigates

back to the Main window. Selecting any other item navigates to the associated

setup screen.

ROLLOFF Setup Screen

The ROLLOFF setup screen controls the low frequency audio response of the

IFBT4 VHF. The 35 Hz setting is the default and may be used in the absence

of adverse conditions, for a fuller bass response. The 50 Hz setting should be

used whenever wind noise, HVAC rumble, trafﬁc noise or other low frequency

sounds may degrade the quality of the audio. Press MENU to return to the

Setup window.

LECTROSONICS, INC.4

COMPAT Setup Screen

The COMPAT setup screen selects the current compatibil-

ity mode, for interoperation with various types of receivers.

The available modes are:

Nu Hybrid - This mode offers the best audio quality and is recommended if

your receiver supports it.

IFB - Lectrosonics IFB compatibility mode. This is the default setting and is

the appropriate setting to use with the Lectrosonics IFBR1A or a com-

patible IFB receiver.

NOTE: If your Lectrosonics receiver does not have Nu Hybrid mode,

use Euro Digital Hybrid Wireless® (EU Dig. Hybrid).

E01, X

IFB - Lectrosonics IFB compatibility mode. This is the default setting and is

the appropriate setting to use with the Lectrosonics IFBR1A or a com-

patible IFB receiver.

HBR - Digital Hybrid Mode. This mode offers the best audio quality and is

recommended if your receiver supports it.

Press MENU to return to the Setup window.

Lock/Unlock Panel Buttons

To enable or disable the control panel buttons, navigate to the Main Window

and press and hold the MENU button for about 4 seconds. Continue holding

the button as a progress bar extends across the LCD.

When the bar reaches the right side of the screen, the unit will toggle to the

opposite mode and LOCKED or UNLOCKED will ﬂash brieﬂy on the screen.

www.lectrosonics.com 5

IFBT4 VHF Menu Diagram

E01,X Compat Modes

US Compat Modes

LECTROSONICS, INC.6

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 individual switches. For detailed

information on the setting of these switches see the owner’s manual.

MODE Switches

The MODE switches Switch

Positions Input

Name 1 2 3 4 XLR Pins Balanced Sensitivity

CC qqqp 3 = Audio No -10 dBu

1 = Common

MIC pppq 2 = Hi Yes -42 dBu

3 = Lo

1 = Common

LINE ppqq 2 = Hi Yes 0 dBu

3 = Lo

1 = Common

RTS1 pqqq 2 = Hi No 0 dBu

1 = Common

RTS2 qqqq 3 = Hi No 0 dBu

1 = Common

allow the IFBT4 VHF

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 settings.

Each setting is

detailed below.

Switches 1 and 2

adjust the XLR pin

functions while switches

3 and 4 adjust the input sensitivity.

Power Input Connector

The IFBT4 VHF is designed to be used with the DCR12/A5U (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.

Antenna

The ANTENNA connector is a standard 50 ohm BNC connector for use with

standard coaxial cabling and remote antennas.

Rear Panel Controls and Functions

www.lectrosonics.com 7

Accessories

DCR12/A5U

AC power supply for IFBT4 transmit-

ters; 100-240 V, 50/60 Hz, 0.3 A input,

12 VDC regulated output; 7-foot cord

with LZR threaded locking plug and

interchangeable blades/posts for use in

Europe, UK, Australia and USA (sold

separately).

A170AC

VHF straight whip antenna; right angle

BNC connector

ARG15

A 15 foot antenna cable of standard

RG-58 coax cable with BNC connectors

at each end. Loss of 1 to 2 dB with 0.25”

diameter.

ARG25/ARG50/ARG100

An antenna cable of Belden 9913F low-

loss coax cable with BNC connectors

at each end. Double shielded, ﬂexible,

50 Ohms, with a foamed polyethylene

dielectric. Lower loss (1.6 to 2.3 dB) with

somewhat less weight than standard

RG-8 with the same 0.400” diameter.

Available in 25, 50 and 100 foot lengths.

RMP195

4 channel rack mount for up to four

IFBT4 transmitters. Rocker switch in-

cluded to work as a master power switch

if desired.

21425

6 ft. long power cord; coaxial to stripped

& tinned leads. Coaxial plug: ID-.080”;

OD-.218”; Depth- .5”. Fits all compact

receiver models that use CH12 power

supply.

21472

6 ft. long power cord; coaxial to stripped

& tinned leads. Right angle coaxial plug:

ID-.075”; OD-.218”; Depth- .375”. Fits all

compact receiver models that use CH12

power supply.

21586

DC16A Pigtail power cable, LZR stripped

& tinned.

DCR12/A5U

ARG15

ARG25

ARG50

ARG100

RMP195

.475”

.375” O.D.

.375”

.35”

.375” O.D.

21425

21472

21586

.475” O.D.

Locking collar with

5/16”-32 thread

.475” O.D.

Locking collar with

5/16”-32 thread

A170AC

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