Lectrosonics R400 User Manual download pdf (Page 16)

R400

Frequency Coordination

Intermodulation interference is a problem constantly

lurking in the background, especially when working in

environments were multiple productions are taking place

simultaneously in relative close proximity. In these

cases, proper frequency coordination is a must. There

are basically three methods coordinate frequencies:

Use the Compatible Frequency Chart

Scan for clear channels (See Scan Function)

Call Lectrosonics

Compatible Frequency Chart

Considering that multiple systems can be used in a

production, coordinating frequencies to minimize interfer-

ence between these channels can be a daunting pro-

cess.

The Compatible Frequency Chart was designed to assist

in minimizing intermodulation problems for multiple

channel wireless systems. It does this by identifying

potential intermodulation problems and listing compatible

frequencies and frequency groups. This chart can be

used with all Digital Hybrid Wireless

™

(400 Series)

receivers.

The Compatible Frequency Chart divides the frequency

blocks used in the North American market into Row 1

and Row 2, then further divides 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. (See Compatible

Frequency Chart.)

Understanding and using the Compatible Frequency

Chart is not as difficult as it first appears. There are a

few basic rules to follow:

Note

Refer to the Compatibility Frequency Chart's Compatible and

Incompatible frequency combinations. (Only frequency blocks 21

and 22 are shown for illustrative purposes.)

Rule No. 1

Row 1 and Row 2 live in two different worlds. The

frequencies in Row 1 are not compatible with the fre-

quencies in Row 2. If you are forced to use frequencies

from Row 1 with frequencies from Row 2, be aware that

intermodulation problems may exist.

Compatible Frequency Chart

BLOCK 21 BLOCK 22 BLOCK 23

BLOCK 24

FREQ SW SET US TV CH FREQ SW SET US TV CH FREQ SW SET US TV CH

FREQ SW SET US TV CH

538.100 0,5 tv25 563.700 0,5 tv29 589.300 0,5 tv33

614.900 0,5 tv38

538.700 0,B tv25 564.300 0,B tv29 589.900 0,B tv33

615.500 0,B tv38

539.600 1,4 tv25 565.200 1,4 tv29 590.800 1,4 tv34

616.400 1,4 tv38

540.200 1,A tv25 565.800 1,A tv29 591.400 1,A tv34

617.000 1,A tv38

541.500 2,7 tv25 567.100 2,7 tv30 592.700 2,7 tv34

618.300 2,7 tv38

542.400 3,0 tv26 568.000 3,0 tv30 593.600 3,0 tv34

619.200 3,0 tv38

542.900 3,5 tv26 568.500 3,5 tv30 594.100 3,5 tv34

619.700 3,5 tv38

543.700 3,D tv26 569.300 3,D tv30 594.900 3,D tv34

620.500 3,D tv39

550.100 7,D tv27 575.700 7,D tv31 601.300 7,D tv35

626.900 7,D tv40

552.300 9,3 tv27 577.900 9,3 tv31 603.500 9,3 tv36

629.100 9,3 tv40

553.000 9,A tv27 578.600 9,A tv32 604.200 9,A tv36

629.800 9,A tv40

554.300 A,7 tv28 579.900 A,7 tv32 605.500 A,7 tv36

631.100 A,7 tv40

556.100 B,9 tv28 581.700 B,9 tv32 607.300 B,9 tv36

632.900 B,9 tv41

557.000 C,2 tv28 582.600 C,2 tv32 NOT AVAILABLE

633.800 C,2 tv41

559.600 D,C tv28 585.200 D,C tv33 NOT AVAILABLE

636.400 D,C tv41

561.900 F,3 tv29 587.500 F,3 tv33 NOT AVAILABLE

638.700 F,3 tv42

FREQ SW SET US TV CH FREQ SW SET US TV CH FREQ SW SET US TV CH

FREQ SW SET US TV CH

544.500 4,5 tv26 570.100 4,5 tv30 595.700 4,5 tv34

621.300 4,5 tv39

545.100 4,B tv26 570.700 4,B tv30 596.300 4,B tv35

621.900 4,B tv39

546.000 5,4 tv26 571.600 5,4 tv30 597.200 5,4 tv35

622.800 5,4 tv39

546.600 5,A tv26 572.200 5,A tv31 597.800 5,A tv35

623.400 5,A tv39

547.600 6,4 tv26 573.200 6,4 tv31 598.800 6,4 tv35

624.400 6,4 tv39

548.800 7,0 tv27 574.400 7,0 tv31 600.000 7,0 tv35

625.600 7,0 tv39

549.300 7,5 tv27 574.900 7,5 tv31 600.500 7,5 tv35

626.100 7,5 tv40

549.900 7,B tv27 575.500 7,B tv31 601.100 7,B tv35

626.700 7,B tv40

555.500 B,3 tv28 581.100 B,3 tv32 606.700 B,3 tv36

632.300 B,3 tv41

556.500 B,D tv28 582.100 B,D tv32 607.700 B,D tv36

633.300 B,D tv41

557.000 C,2 tv28 582.600 C,2 tv32 NOT AVAILABLE

633.800 C,2 tv41

558.700 D,3 tv28 584.300 D,3 tv32 NOT AVAILABLE

635.500 D,3 tv41

559.400 D,A tv28 585.000 D,A tv33 NOT AVAILABLE

636.200 D,A tv41

560.000 E,0 tv29 585.600 E,0 tv33 NOT AVAILABLE

636.800 E,0 tv41

560.700 E,7 tv29 586.300 E,7 tv33 NOT AVAILABLE

637.500 E,7 tv41

562.500 F,9 tv29 588.100 F,9 tv33 NOT AVAILABLE

639.300 F,9 tv42

Grp A

Grp B

Grp C

Grp D

ROW 1

ROW 2

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 22 23 24

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