Lectrosonics VRFIELD (Narrowband) User Manual download pdf (Page 22)

VR Field

Frequency Coordination

Intermodulation interference is a problem constantly

lurking in the background, especially when working

in environments where simultaneous productions are

taking place in close proximity. In these cases, proper

frequency coordination is a must. There are basically

three methods to coordinate frequencies:

• Use the built-in frequency groups

• Scan for clear channels (See SmartTune™

and Scan Function.)

• Call Lectrosonics

Frequency Compatibility Chart

Considering that multiple systems can be used in a produc-

tion, coordinating frequencies to minimize interference

between these channels can be a daunting process.

The Frequency Compatibility Chart was designed to as-

sist in minimizing intermodulation problems for multiple

channel wireless systems. It does this by identifying

potential intermodulation problems and listing compat-

ible frequencies and frequency groups. This chart can

be used with all Digital Hybrid Wireless

™

(400 Series)

receivers.

The chart divides the frequency blocks used in the North

American market into Set 1 and Set 2, then further di-

vides each row into two groups of eight frequencies each.

These frequency groups are labeled A and B and C and

D, and correspond to the factory set frequency groups

(Groups A, B, C and D) described in the Tuning Setup

Screen.

Understanding and using the Frequency Compatibility

Chart is not as difﬁcult as it ﬁrst appears. There is a pat-

tern of compatible frequencies that becomes apparent, as

illustrated on the Frequency Compatibility Diagram on the

next page.

Frequency Compatibility Chart

LECTROSONICS, INC.

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Lectrosonics VRFIELD (Narrowband) User Manual Page 22