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10
Fre quency Bands
Fre quency Bands
The BTR-1 sys tem op er ates in TV chan nels 16 to 36 and 38 to
59. This is the fre quency range of 482 to 608 MHz and 614
MHz to 746 MHz. The band, TV chan nels and fre quen cies are
shown in Ta ble 2. Most bands are 18 MHz wide, how ever
band 7 is 24 MHz wide.
Bands F to E are al ways base trans mit bands (beltpack re ceive
bands). Bands 1 to 7 are al ways base re ceive bands (beltpack
trans mit bands). Thus an A2 base sta tion would be com prised
of an A band trans mit ter paired with a 2 band re ceiver.
Band Pair ing for Sys tems
All band pairs can not be made into a sys tem (a sin gle sys tem
is com prised of a base and beltpack). Ta ble 1 show the avail --
able band pair ings.
Ta ble 1
Avail able Band Pair ings
In Ta ble 1 it can been seen that a C base sta tion trans mit band
can be paired with 4, 5, 6 or 7 re ceive bands. How ever, a C3
unit can not be made. This is be cause a cer tain amount of fre --
quency sep a ra tion be tween trans mit and re ceive bands is re --
quired for good trans mit and re ceive op er a tion. If they are too
close the RF per for mance of the sys tem is re duced.
Ta ble 2
Band Names and TV Chan nels
10-1
Base TX Bands Base RX Bands
F 1, 2, 3, 4, 5, 6, 7
H 1, 2, 3, 4, 5, 6, 7
A 2, 3, 4 ,5, 6 ,7
B 3, 4, 5, 6, 7
C 4, 5, 6, 7
D 5, 6, 7
E 6, 7
Band TV Freq. Start Freq. End
F
16 482 488
17 488 494
18 494 500
H
19 500 506
20 506 512
21 512 518
A
22 518 524
23 523 530
24 530 536
B
25 536 542
26 542 548
27 548 554
C
28 554 560
29 560 566
30 566 572
D
31 572 578
32 578 584
33 584 590
E
34 590 596
35 596 602
36 602 608
Not Used
37 608 614
1
38 614 620
39 620 626
40 626 632
2
41 632 638
42 638 644
43 644 650
3
44 650 656
45 656 662
46 662 668
4
47 668 674
48 674 680
49 680 686
5
50 686 692
51 692 698
52 698 704
6
53 704 710
54 710 716
55 716 722
7
56 722 728
57 728 734
58 734 740
59 740 746