Telex FM-1, QSB-1, SMP operating instructions Frequency Bands, Band Pairing for Systems

Page 24

Section

8

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, the 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 1-7 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

8-1

Image 24
Contents Telex Table of Content Ii- Blank Introduction Overall DescriptionBlank Installing the Program Step Installing Driver for QSB-1 Card Reader StepSystem Manager Program SMP Software System Manager Program SMPLaunching the System Manager Program Step Main screen of the system manager programUsing the System Manager Program Main menu bar definitions are defined BelowEvent Name Configuration Button Base Main ScreenButton Options Button C ScreenDownloading / Uploading Downloading an EventUploading a SnapShot QSB-1 Specifications QSB-1QSB-1 Card Reader Blank FM-1 Frequency Manager Front Panel Controls and ConnectionsRear Panel Controls and Connections Front View of FM-1FM-1 Specifications OperationSnap Shot Selecting an Event and Downloading to SystemDownloading a Card Blank FM-1 Menu Flow Chart FM-1 Menu StructureBlank Software License End-User License Agreement for Telex SoftwareBlank DataFlash→ Card Handling and Storage Precautions Blank Band Pairing for Systems Frequency BandsFrequency Bands Blank Replacement Parts and Accessories Blank