Lectrosonics D4 System User Manual download pdf (Page 13)

4-channel Digital Wireless System

Rio Rancho, NM, USA

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.

Freq 1

Freq 2

Freq 3

Freq 4

4 CHANNEL MODE

2 CHANNEL MODE

Freq

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.

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Lectrosonics D4 System User Manual Page 13

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