Lectrosonics Venue 3.9 - Manual (Page 11)

Digital Hybrid Wireless™ Modular Receiver System
Find Clear Channels
Using Tuning Groups to Find Clear Channels
Under the SetUpRx menu, Tuning modes can be se­
lected for manual frequency selection.
There are four pre-coordinated frequency groups, plus
two groups that can be customized for specific applica­
tions. Groups “a” though “d” are stored frequencies that
are free from IM. Groups “u” and “v” are user defined
to build custom groups. In the sequence that follows
“Group a” is used as the example.
1. Turn off all transmitters, then press the front panel
button under the receiver you wish to program.
2 . Press the MENU/SELECT control and rotate the
knob to select Tuning and press the knob again.
Rotate the knob either directon to scroll through the
groups and select the desired one (Group a in this
example), then press the BACK button twice. This
will leave you on the Receiver Detail screen ready
for the next step.
3. Rotate the MENU/SELECT control through the pre­
selected frequencies while observing the RF Signal
Strength meter. Select a frequency where no RF
signal is indicated on the meter.
Using Full Spectrum Scan to Find Clear Channels
In crowded RF environments, it may not be possible to
find enough clear channels using a Tuning Group. The
internal spectrum scanner can then be used to find
clear channels manually across the entire tuning range
of the receiver in 100 kHz steps. The Scan Function
automatically selects two receivers (one from each fre­
quency block) for spectrum scanning purposes.
1. Turn off all transmitters and set all receiver modules
to the NORMAL tuning mode.
2. Press the MENU/SELECT knob and select Scan.
Press the knob again to start the scanning. The re­
ceivers used for the scan are selected automatically
and highlighted on the LCD.
Allow the scanner to continue sweeping through the
tuning range several times, then press the Function
button to enter “Stop Mode.”
Function
Button
3. With the scanning stopped, select each receiver
one at a time and rotate the knob to set the fre­
quency on a clear channel away from the other
receivers. The cursor on the LCD will blink for the
selected receiver. Make fine adjustments in the next
step.
Function
Button
Front Panel Receiver Select Buttons
4. Press the Function Button to zoom to a closeup
view of the scan results. Then select each receiver
one at a time and make fine adjustments to place
the cursor in clear channels.
Function
Button
Front Panel Receiver Select Buttons
5. Check for IM by turning the transmitters off one at a
time and look for RF energy indicated on the LCD
when the matching transmitter is turned off. The RF
signal should be very strong when the transmitter
is on as shown in the example below, and drop to a
very low level or disappear when the transmitter is
turned off.
Strong RF Signal Strength
Rio Rancho, NM 11