User's Manual

LECTROSONICS, INC.
2
IFBT4 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, so 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 and frequency block number (e.g. IFBT4 BLK 25).
2. Displays installed firmware version number (e.g. VERSION 1.0).
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,
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 extends all the way to the
right and widens somewhat. Clipping is indicated when the zero in the lower
right corner changes to a capital “C”.
The Up and Down buttons are disabled in this Window.
Frequency Window
Pressing the MENU button once from the Main window
navigates to the Frequency window. The Frequency window
displays the current operating frequency in MHz, as well as
the standard Lectrosonics hex code for use with transmitters equipped with hex
Front Panel Controls and Functions