Section

10

Frequency Bands

Frequency Bands

The BTR-1 system operates in TV channels 16 to 36 and 38 to

59.This is the frequency range of 482 to 608 MHz and 614 MHz to 746 MHz. The band, TV channels and frequencies are shown in Table 2. Most bands are 18 MHz wide, however band 7 is 24 MHz wide.

Bands F to E are always base transmit bands (beltpack receive bands). Bands 1 to 7 are always base receive bands (beltpack transmit bands). Thus an A2 base station would be comprised of an A band transmitter paired with a 2 band receiver.

Band Pairing for Systems

All band pairs cannot be made into a system (a single system is comprised of a base and beltpack). Table 1 show the avail- able band pairings.

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

 

 

Table 1

Available Band Pairings

In Table 1 it can been seen that a C base station transmit band can be paired with 4, 5, 6 or 7 receive bands. However, a C3 unit cannot be made. This is because a certain amount of fre- quency separation between transmit and receive bands is re- quired for good transmit and receive operation. If they are too close the RF performance of the system is reduced.

 

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

 

 

 

 

 

Table 2

Band Names and TV Channels

10-1

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Telex BTR-1 Frequency Bands, Band Pairing for Systems, Available Band Pairings, Band Names and TV Channels

BTR-1, TR-1 specifications

The Telex TR-1 and BTR-1 represent significant advancements in the realm of professional audio communication, particularly suited for broadcast environments and large-scale live events. Both devices reflect Telex's commitment to innovation and superior functionality.

The Telex TR-1 is a crucial component in wireless intercom systems. It is designed for portable use, featuring a compact and lightweight design that makes it ideal for remote locations and on-the-go communications. The TR-1 utilizes advanced digital signal processing technology, which ensures crystal-clear audio quality and minimal latency, crucial for effective communication in dynamic environments. Its ergonomic design includes intuitive controls, which allow users to adjust volumes and change channels with ease, providing quick access to vital communication functionalities.

One standout feature of the TR-1 is its impressive battery life. The device can operate for extended periods, allowing users to focus on their work without the constant need to recharge. Additionally, the TR-1 incorporates a robust RF performance capability, enabling reliable connectivity over long distances in challenging RF environments, where multiple signals may contest the same frequency spectrum.

On the other hand, the Telex BTR-1 is a versatile base station that complements the TR-1 by providing the backbone for wireless communication in professional settings. The BTR-1 supports multiple channels and can accommodate a variety of belt packs and headsets, making it an ideal choice for complex setups with numerous users. Its 2.4 GHz frequency band means less susceptibility to interference, ensuring that communications remain clear even in crowded situations.

The BTR-1's advanced matrix intercom features allow for flexible routing of audio signals between users, enhancing coordination during productions or events. The unit also includes extensive network capabilities, making it possible to integrate with other communication systems and allowing for remote access and monitoring.

Overall, both the Telex TR-1 and BTR-1 epitomize the blend of portability, reliability, and scalability required for professional audio communications. Their cutting-edge technologies and thoughtful design make them indispensable tools for broadcasters, event organizers, and any professionals who rely on effective and efficient communication solutions.