Lectrosonics D4 System - Manual (Page 13)

4-channel Digital Wireless System
Rio Rancho, NM, USA 13
Finding Clear Frequencies
It is best to check for interference before selecting a
frequency. Turn the receiver on and leave the trans-
mitter off. Observe the RF level indicator in the Main
Window to see if signal is present.
Weak RF level
Strong RF level
If a signal is indicated, navigate to the tuning setup
screen and select a different frequency. Then return to
the Main Window and check for the presence of an RF
signal again. Proceed in this manner to find a frequen-
cy where no RF signal is present, or to the frequency
indicating the weakest signal present.
With multiple systems operating in the same location,
select a different frequency for each system. (See Fre-
quency Selection on the previous page for details.)
Walk test each system through the area where it will
be operating and listen for dropouts while observing
the RF level indicator on the receiver LCD. It is best to
have all equipment in the location turned on and con-
nected to check for interference that might be gener-
ated by other devices.
If the RF level on the receiver LCD indicates a weak
overall level, try re-positioning the antennas. Re-ori-
enting the antennas or moving them even a few inches
away from nearby surfaces can also make a difference.
If dropouts are experienced during the walk test, but
the RF level at the receiver remains strong, there could
be interference on that frequency band. Switch the
system to another frequency and walk test the system
again to check for adequate operating range.
Frequency Selection
Frequencies are arranged into four groupings as
shown below, with each grouping containing one
4-channel frequency and two 2-channel frequencies.
In the 4-channel mode (4 audio channels) one of four
different frequencies may be selected, each containing
four audio channels. In the 2-channel mode (2 audio
channels) one of eight frequencies may be selected,
each containing two audio channels.
OR
Freq 1 Freq 2 Freq 3 Freq 4
4 CHANNEL MODE
2 CHANNEL MODE
Freq
1A
Freq
2A
Freq
2B
Freq
3A
Freq
3B
Freq
4A
Freq
4B
OR OR OR
Freq
1B
Compatibility
In the 4-channel mode, all four frequencies can be
used together in the same location. Where any 4-chan-
nel frequency is in use, neither of the 2-channel fre-
quencies in the same grouping can be used.
In the 2-channel mode, any of the frequencies can be
used together. The 4-channel frequency in the same
grouping cannot be used if either one or both of its
2-channel frequencies are in use.
Up to 16 audio channels are available using multiple
systems in various combinations of 2-channel and
4-channel modes.