Using The Scan Function; Call Lectrosonics - Lectronics VR Field Reference Manual

VR Field Receiver
The following guidelines should be observed when
selecting frequencies:
1..Set.1.and.Set.2.are.NOT.compatible.
Proper coordination requires that all frequencies be
taken from either Set 1 or Set 2, but not a combina-
tion of the two.
(The remaining guidelines make the assumption
that you are choosing frequencies within one
frequency set.)
2..Frequencies.within.an.individual.block.in.the.
same.Set.are.compatible..
(Example: All 16 frequencies in
Block 25, Group A and B)
3..Frequencies.from.adjacent.blocks,.but.different.
Groups.are.compatible.
(Example: Block 21, Group C frequencies
are compatible with
Block 22, Group D frequencies)
4..Frequencies.from.adjacent.blocks.and.the.same.
Group.are.NOT.compatible.
(Example: Block 26, Group B frequencies
are NOT compatible with
Block 26, Group B frequencies)
It is highly recommeneded that you choose frequencies
that are in the same set and same group.
By following these guidelines, it is possible to locate a
number of operating frequencies early in the production
that are free from intermodulation, then refine the list
during system setup.


Using the Scan Function

Refer to the section titled "Using Scan to Find Clear
Channels" for details on how to use the built-in spec-
trum scanner.
Interference can result from a wide variety of sources
including TV station signals, other wireless equipment
in use nearby, or from intermodulation within the VR
Field system itself. The RF spectrum analyzer built into
the VR Field system uses a receiver in each frequency
block to scan the tunable spectrum and find clear chan-
nels with little or no interference. After scanning and
finding the needed number of clear channels, one final
procedure is necessary to verify the compatibility of the
chosen frequencies.
Turn on all transmitters and receivers and verify there
is a strong RF signal for each receiver. Turn each
transmitter off one at a time and observe the RF level
indicator on the matching receiver. 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.
Any time a frequency is changed on any of the systems
in use, you must start at the beginning and go through
this procedure for all systems. This will test for higher
order imtermodulation from all signal sources and avoid
interference.

Call Lectrosonics

Lectrosonics uses a proprietary computer program to
perform thousands of calculations and identify vari-
ous interfering signals. Potential problems and trouble
areas can be identified in advance, and proposed new
frequencies or other solutions can be suggested. This
service is offered to authorized Lectrosonics dealers
and other customers who are using Lectrosonics
less microphone and wireless IFB systems.
wire-
®
LECTROSONICS, INC.