Compatible Frequency Chart; Frequency Coordination; Rule No. 1 - Lectrosonics R400 Operating Instructions Manual

R400
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
receivers.
Grp A
Grp B
Grp C
Grp D
16

Frequency Coordination

™
(400 Series)
Compatible Frequency Chart
BLOCK 21
FREQ SW SET US TV CH FREQ
538.100 0,5 tv25 563.700
538.700 0,B tv25 564.300
539.600 1,4 tv25 565.200
540.200 1,A tv25 565.800
541.500 2,7 tv25 567.100
542.400 3,0 tv26 568.000
542.900 3,5 tv26 568.500
543.700 3,D tv26 569.300
550.100 7,D tv27 575.700
552.300 9,3 tv27 577.900
553.000 9,A tv27 578.600
554.300 A,7 tv28 579.900
556.100 B,9 tv28 581.700
557.000 C,2 tv28 582.600
559.600 D,C tv28 585.200
561.900 F,3 tv29 587.500
FREQ SW SET US TV CH FREQ
544.500 4,5 tv26 570.100
545.100 4,B tv26 570.700
546.000 5,4 tv26 571.600
546.600 5,A tv26 572.200
547.600 6,4 tv26 573.200
548.800 7,0 tv27 574.400
549.300 7,5 tv27 574.900
549.900 7,B tv27 575.500
555.500 B,3 tv28 581.100
556.500 B,D tv28 582.100
557.000 C,2 tv28 582.600
558.700 D,3 tv28 584.300
559.400 D,A tv28 585.000
560.000 E,0 tv29 585.600
560.700 E,7 tv29 586.300
562.500 F,9 tv29 588.100
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:
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.
BLOCK 22 BLOCK 23
SW SET US TV CH FREQ
0,5 tv29 589.300
0,B tv29 589.900
1,4 tv29 590.800
1,A tv29 591.400
2,7 tv30 592.700
3,0 tv30 593.600
3,5 tv30 594.100
3,D tv30 594.900
7,D tv31 601.300
9,3 tv31 603.500
9,A tv32 604.200
A,7 tv32 605.500
B,9 tv32 607.300
C,2 tv32 NOT AVAILABLE
D,C tv33 NOT AVAILABLE
F,3 tv33 NOT AVAILABLE
SW SET US TV CH FREQ
4,5 tv30 595.700
4,B tv30 596.300
5,4 tv30 597.200
5,A tv31 597.800
6,4 tv31 598.800
7,0 tv31 600.000
7,5 tv31 600.500
7,B tv31 601.100
B,3 tv32 606.700
B,D tv32 607.700
C,2 tv32 NOT AVAILABLE
D,3 tv32 NOT AVAILABLE
D,A tv33 NOT AVAILABLE
E,0 tv33 NOT AVAILABLE
E,7 tv33 NOT AVAILABLE
F,9 tv33 NOT AVAILABLE
Note
BLOCK 24
FREQ SW SET
SW SET US TV CH
0,5 tv33 614.900
0,B tv33 615.500
1,4 tv34 616.400
1,A tv34 617.000
2,7 tv34 618.300
619.200
3,0 tv34
3,5 tv34 619.700
3,D tv34 620.500 3,D
7,D tv35 626.900 7,D
9,3 tv36 629.100
9,A tv36 629.800
A,7 tv36 631.100
B,9 tv36 632.900
633.800 C,2
636.400 D,C
638.700
SW SET US TV CH
FREQ SW SET
4,5 tv34
621.300
4,B tv35
621.900 4,B
5,4 tv35
622.800
5,A tv35
623.400 5,A
6,4 tv35
624.400
7,0 tv35
625.600
7,5 tv35
626.100
7,B tv35
626.700 7,B
B,3 tv36
632.300 B,3
B,D tv36
633.300 B,D
633.800 C,2
635.500 D,3
636.200 D,A
636.800 E,0
637.500 E,7
639.300
US TV CH
0,5 tv38
0,B tv38
1,4 tv38
1,A tv38
2,7 tv38
3,0 tv38
3,5 tv38
tv39
tv40
9,3 tv40
9,A tv40
A,7 tv40
B,9 tv41
tv41
tv41
F,3 tv42
US TV CH
4,5 tv39
tv39
5,4 tv39
tv39
6,4 tv39
7,0 tv39
7,5 tv40
tv40
tv41
tv41
tv41
tv41
tv41
tv41
tv41
F,9 tv42