Lectrosonics R400 - Manual (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
16
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
R
O
W 1
R
O
W 2