Lectrosonics Venue 3.9 User Manual download pdf (Page 24)

Venue

Multi-channel System Checkout

Interference can result from a wide variety of sources

including TV station signals, other wireless equipment

in use nearby, or from intermodulation within a multi-

channel wireless system itself. Regardless of how the

frequencies were coordinated, a ﬁnal checkout proce-

dure is always a good idea.

The pre-coordinated frequencies on the chart on the

previous pages address in-system intermodulation,

but obviously do not take into account RF signals from

external sources that may be present in the location

where the system will be operating. The procedure out-

lined below is necessary to check for interference from

external sources.

Scanning with the RF spectrum analyzer built into the

Venue system will identify external RF signals, but

it does not address the compatibility of the selected

frequencies. After scanning and ﬁnding the needed

number of clear channels, the following procedure is

necessary to check the compatibility.

1. Set up the system for testing. Place antennas in

the position they will be used and connect to the

receivers. Place transmitters about 3 to 5 feet apart,

about 25 to 30 feet from the receiver antennas. If

possible, have all other equipment on the set, stage

or location turned on as well, especially any mixing

or recording equipment that will be used with the

wireless system.

2. Set all receivers on clear channels.

Turn on all receivers, but leave the transmitters off.

Look at the RF level display on each receiver. If

an indication is present, change the frequency to

a clear channel where no signal is indicated. If a

completely clear channel cannot be found, set it for

the lowest RF level indication. Once all receivers on

on clear channels, go to step 2.

3. Turn each transmitter on one at a time. Leave

the other transmitters turned off. Then, as you turn

on each one, look at the matching receiver to verify

a strong RF signal is received. Then, look at the

other receivers and see if one of them is also pick-

ing up the signal. Only the matching receiver should

indicate a signal. Change frequencies on either

system slightly until it will pass this test, then check

again to see that all receivers are still on clear

channels as in Step 2.

4. Turn each transmitter off one at a time. With all

transmitters and receivers turned on, turn each

transmitter off one at a time and look at the RF level

indicator on the matching receiver. It should “fall

silent” and the RF level should disappear or drop to

a very low level. If it does not, change frequency on

that receiver and transmitter and try it again.

IMPORTANT: Any time a frequency is changed on

any of the systems in use, you must start at the

beginning and go through this procedure again for

all systems. With a little practice, you will be able

to do this quickly and save yourself some “multi-

channel grief.”

LECTROSONICS, INC.

1 2 ... 19 20 21 22 23 24 25 26 27 28

Comments to this Manuals

No comments

Lectrosonics Venue 3.9 User Manual Page 24

Comments to this Manuals

Related products and manuals for Equipment Lectrosonics Venue 3.9