Shure WA405 manual System Installation, Selecting Antennas, Antenna Extension Cables

SYSTEM INSTALLATION

Selecting Antennas

Use quarter-wave or half-wave antennas for mounting on the back or front of the WA405. Half-wave antennas offer improved performance over quarter-wave antennas and can be used for remote mounting without a backplane. Half- wave antennas are available from Shure in two different styles: flexible cable or ªroll-upº (Model WA490) and tele- scoping (Model WA390).

Antennas come in different lengths for different frequen- cy bands: A (169±185 MHz), B (185±200 MHz), and C (200±230 MHz). For best performance, choose the antenna length that corresponds to your system's operating frequen- cy. When more than one frequency band is covered, select antennas as follows:

SIf the frequencies span two adjacent bands, select an- tennas for the lowest frequency band.

SIf the frequencies span all three bands, use one from the lowest band, and one from the highest band (one ªAº an- tenna and one ªCº antenna).

2.Connect the supplied antenna cables to the receiver an- tenna inputs and adapters. See Figure 4.

CONNECT ANTENNA CABLES

FIGURE 4

3.Install the antennas onto the bulkhead adapters pro- truding through the front panel. See Figure 5.

Antenna Extension Cables

Extension cables allow greater freedom for antenna placement. When operating conditions are less than ideal, they allow you to place antennas farther apart for better di- versity reception, or to place them closer to the transmitters.

NOTE: Use only half-wave antennas (or other ground plane independent antenna) for remote antenna placement. Nev- er use quarter-wave antennas with extension cables.

The following cables types are recommended:

Maximum	Cable Type
Distance
6.1 m (20 ft)	Shure WA421 Extension Cable Kit
12.2 m (40 ft)	RG-58U
30.5 m (100 ft)	Low-loss RG-8U or RG-11U

NOTE: For lengths greater than 30.5 m (100 ft), special low-loss cable types are necessary. Consult the Shure Ap- plications Group for more information.

Installing Front-Mounted Antennas

1.Insert the bulkhead adapters through the holes in each bracket, and secure them from each side using the sup- plied hardware. See Figure 3.

INSERTING BULKHEAD ADAPTERS

FIGURE 3

WA405	ANTENNA
(FRONT VIEW)

ATTACH ANTENNAS TO THE ADAPTERS

FIGURE 5

Mounting the WA405 in an Equipment Rack

1.Insert the unit into a 19-inch equipment rack.

2.Using the screws supplied, secure the unit to the rack (Figure 6).

RACK MOUNTING

FIGURE 6

3.If the antennas are remote mounted from the back of the rack, insert the supplied plastic plugs into the holes on the front of the brackets.

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