AKG Acoustics WMS 40 - Manual (Page 50)

48 www.akg.com
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.
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
Frequency bands I + II
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
AKG WMS ANTENNA TECHNOLOGY
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.
S
ELECTING
,
PLACING
,
AND USING ANTENNAS
HOW TO USE ANTENNAS