AKG WMS ANTENNA TECHNOLOGY

HOW TO USE ANTENNAS

SELECTING, PLACING, AND USING ANTENNAS

Cable attenuation setting vs. cable length in complex systems

The CLA cable attenuation setting on the booster(s) and antenna splitter(s) depends on the frequency band, antenna type, cable type, cable length, and the position of the cable within the antenna line.

For details on setting up an antenna network refer to the PS 4000 manual.

Frequency bands I + II

 

Cable position A

 

 

Cable position A

 

 

Cable position A

 

 

Cable position B

SRA2B > AB 4000 or PS 4000

 

RA 4000 B > AB 4000 or PS 4000

 

SRA1 > AB 4000 or PS 4000

 

AB 4000 > AB 4000 or PS 4000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RG 58

RG 213

CLA setting

 

RG 58

RG 213

CLA setting

 

RG 58

 

RG 213

CLA setting

 

RG 58

 

RG 213

CLA setting

(m)

(m)

(dB)

 

(m)

(m)

(dB)

 

(m)

 

(m)

(dB)

 

(m)

 

(m)

(dB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

53-57

111-121

0

 

38-43

79-89

0

 

8-13

 

16-26

0

 

41-46

 

87-97

0

48-53

100-111

2

 

33-38

68-79

2

 

3-8

 

5-16

2

 

36-41

 

76-87

2

43-48

89-100

4

 

28-33

58-68

4

 

0-3

 

 

4

 

31-36

 

66-76

4

38-43

79-89

6

 

23-28

47-58

6

 

 

 

 

 

 

26-31

 

55-66

6

33-38

68-79

8

 

18-23

37-47

8

 

 

 

 

 

 

21-26

 

45-55

8

28-33

58-68

10

 

13-18

26-37

10

 

 

 

 

 

 

16-21

 

24-45

10

23-28

47-58

12

 

8-13

16-26

12

 

 

 

 

 

 

11-16

 

24-34

12

18-23

37-47

14

 

3-8

5-16

14

 

 

 

 

 

 

6-11

 

13-24

14

Antenna cables

The amount of signal attenuation across a cable depends on the RF transmission frequency and the quality of the cable.

Note: Belden Cable offers some medium-gage wideband cable types with extremely low attenuation values up to 3.2 dB for 100 feet (30 m) at 700 MHz.

Cable type

 

Impedance

 

Attenuation for 100 feet (30 m)

 

Attenuation for 100 feet (30 m)

 

Gage

 

 

 

 

at 700 MHz

 

at 200 MHz

 

 

 

 

 

 

 

 

 

 

 

RG-58C/U

 

50 Ohm

 

17.0 dB

 

7.3 dB

 

Small

RG-58/U

 

50 Ohm

 

11.7 dB

 

5.6 dB

 

Small

RG-59/U

 

75 Ohm

 

8.9 dB

 

4.5 dB

 

Small

RG-8/U

 

50 Ohm

 

3.6 dB

 

1.8 dB

 

Large

Single-channel system with SRA 1 passive antennas For a single-channel system, you can connect the antennas direc- tly to the receiver.

1. Measure the cable runs between the receiver and each antenna.

2. Refer to the table to find out whether you will need to break the cable run down into several cables and use antenna boosters.

3. Connect the antennas to the receiver. If you use antenna boo- sters, you will need a remote power adapter for each booster.

4. Check that the AC mains voltage stated on each power supply is identical to the AC mains voltage available at the venue. Using power supplies for a different AC voltage may cause damage to the unit.

Single-channel system with active antennas

1. Measure the cable runs between the receiver and each active antenna.

2. Refer to the table below to find out whether you will need to break the cable run down into several cables and use antenna boosters.

3. Connect the antennas, antenna boosters, remote power adapter(s), and the receiver as shown in the diagram.

4. Check that the AC mains voltage stated on each power sup- ply is identical to the AC mains voltage available at the venue. Using power supplies for a different AC voltage may cause damage to the unit.

48

www.akg.com

Page 50
Image 50
AKG Acoustics WMS 400 SELECTING, PLACING, and Using Antennas, Cable position a Cable position B, Cable type Impedance

WMS 40, WMS 400, WMS 4000 specifications

AKG Acoustics has long been recognized as a premier brand in the professional audio industry, particularly in the realm of wireless microphone systems. Among its celebrated offerings, the WMS 4000, WMS 400, and WMS 40 series stand out for their advanced technology and robust performance, catering to a range of applications from live performances to studio recordings.

Starting with the WMS 4000, this system is engineered for versatility and reliability. It features a sophisticated transmission diversity system that minimizes dropouts and ensures clear audio quality. The WMS 4000 offers an extensive frequency range, accommodating diverse environments and frequencies. A standout feature is its digital pilot tone, which automatically mutes the transmitter when it is switched off, effectively preventing unwanted noise during transitions. With a range of up to 300 meters, the WMS 4000 is ideal for large venues, allowing performers ample space to move without compromising sound quality.

Next, the WMS 400 series maintains the high standards set by its predecessor while providing a more accessible option for mid-level performers. It combines ease of use with quality audio performance, boasting a user-friendly interface that simplifies setup and operation. The WMS 400 employs an efficient frequency management system, which automatically scans the environment to select the best frequencies available, ensuring optimal performance with minimal interference. The system also features a rugged metal chassis, enhancing durability for live applications.

The WMS 40 series serves as an entry-level solution, perfect for beginners and small venues. It is lightweight and features a straightforward design, making it easy to operate for users without extensive technical knowledge. One of its most notable characteristics is its plug-and-play functionality, allowing for quick setup without complicated configurations. The WMS 40 series also offers excellent sound quality through its crystal-clear audio transmission and robust reception, making it a popular choice for schools, theaters, and small events.

All of these systems benefit from AKG's heritage in sound engineering, incorporating advanced audio processing technologies that ensure superior sound fidelity. They also come with a variety of microphone options, including handheld, lavalier, and headworn microphones, providing flexibility to meet different performance needs. Whether for a professional stage or an intimate setting, the AKG WMS series delivers outstanding performance, reliability, and user-friendly features that cater to a wide range of audio applications.