Digital Hybrid Wireless
®
UHF Belt Pack Transmitter
Rio Rancho, NM
9
Selecting the Compatibility (Compat)
Mode
When used with a Lectrosonics Digital Hybrid Wire-
less
®
receiver, the best audio quality will be achieved
with the system set to the Nu Hybrid compatibility
mode.
Compat
Hybrid
Gain
Freq.
ProgSw
Compat
Use the UP and DOWN arrows to select the desired
mode, then press the
BACK
button twice to return to
the Main Window.
Compatibility modes are as follows. See Specifica-
tions for the modes that correspond to your specific
model:
Receiver Models
LCD menu item
• Mode 3:*
Mode 3
• Nu Hybrid:
Nu Hybrid
• IFB Series:
IFB Mode
Mode 3*
works with certain non-Lectrosonics mod-
els.
Nu Hybrid
works with all Lectrosonics Digital Hybrid
receivers. The receiver must also be set to the Nu
Hybrid compatibility mode.
IFB Series
works with Lectrosonics IFB R1/R1a ana-
log receivers.
NOTE: If your Lectrosonics receiver does not
have Nu Hybrid mode, set the receiver to Euro
Digital Hybrid Wireless® (EU Dig. Hybrid).
* Contact the factory for details of this mode
Connecting the Signal Source
Microphones, line level audio sources and instru-
ments can be used with the transmitter. Refer to the
section entitled
Wiring Hookups for Different Sourc-
es
for details on the correct wiring for microphones
to take full advantage of the Servo Bias circuitry.
Adjusting the Input Gain
The two bicolor Modulation LEDs on the control
panel and keypad provide a visual indication of the
audio signal level entering the transmitter. The LEDs
will glow either red or green to indicate modulation
levels as shown in the following table.
Signal Level
-20 LED
-10 LED
Less than -20 dB
Off
Off
-20 dB to -10 dB
Green
Off
-10 dB to +0 dB
Green
Green
+0 dB to +10 dB
Red
Green
Greater than +10 dB
Red
Red
NOTE: Full modulation is achieved at 0 dB,
when the “-20” LED first turns red. The limiter
can cleanly handle peaks up to 30 dB above this
point.
It is best to go through the following procedure with
the transmitter in the standby mode so that no audio
will enter the sound system or recorder during adjust-
ment.
1)
With fresh batteries in the transmitter, power the
unit on in the standby mode (see previous sec-
tion
Powering On in Standby Mode
).
2)
Navigate to the Gain setup screen.
-40
-20
0
Gain
25
Gain
Freq.
ProgSw
Compat
3)
Prepare the signal source. Position a microphone
the way it will be used in actual operation and
have the user speak or sing at the loudest level
that occur during use, or set the output level of
the instrument or audio device to the maximum
level that will be used.
4)
Use the and arrow buttons to adjust the gain
until the
–10 dB
glows green and the
–20 dB
LED
starts to flicker red during the loudest peaks in
the audio.
5)
Once the audio gain has been set, the signal can
be sent through the sound system for overall
level adjustments, monitor settings, etc.
6)
If the audio output level of the receiver is too high
or low, use only the controls on the receiver to
make adjustments. Always leave the transmitter
gain adjustment set according to these instruc-
tions, and do not change it to adjust the audio
output level of the receiver.
Selecting Step Size
This menu item allows frequencies to be selected in
either 100 kHz or 25 kHz increments.
Compat
StepSize
Phase
Locked
StepSiz
100 kHz
25 kHz
StepSiz
100 kHz
25 kHz
If the desired frequency ends in .025, .050 or .075
MHz, the 25 kHz step size must be selected.
Normally, the receiver is used to find a clear operat-
ing frequency. All Lectrosonics Digital Hybrid Wire-
less
®
receivers provide a scanning function to quickly
and easily find prospective frequencies with little or
no RF interference. In other cases, a frequency may
be specified by officials at a large event such as
the Olympics or a major league ball game. Once the
frequency is determined, set the transmitter to match
the associated receiver.
