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4
ADJUSTING FOR DIFFERENT CABLE LENGTHS
ADJUSTING FOR DIFFERENT CABLE LENGTHS
FIGURE 4
The longer the coaxial cable connecting the UA830 unit and the receiver
or dist
ribution amplifier, the greater the possibility for signal loss. The
UA830 comes with a GAIN switch that can compensate for signal loss
in longer cables. Shure recommends using the Shure UA825 or UA850
or UA8100 coaxial cable when remote mounting antennas. NOTE: Use
only 50
Ω low-loss cables (RG-8 or equivalent).
Set the switch according to these guidelines:
• UA825 Extension Cable (7.6 m [25 ft])-Set GAIN switch in 3 dB
position.
•
UA850 Extension Cable (15.2 m [50 ft])-Set GAIN switch in 10
dB position.
• UA8100 Extension Cable (30.4 m [100 ft])-Set GAIN switch in
10 dB position.
• If over 15.2 m (50 ft) is required, a maximum of two UA830's
(Shure model UR4 and UA845 only) may be chained together.
See Figure 5. The Gain switches for each UA830 must be
adjusted separately. No more than two may be chained.
CHAINING TWO UA830’s
FIGURE 5
*To maintain Shure UA825 and UA850 or UA8100 cables in top
condition in permanent installations:
• Avoid sharp bends or kinks in the cables.
• Do not deform cables with makeshift clamps, such as bending a
nail over the cable.
• Do not use cables in permanent outdoor installations
•
Do not expose cables to extreme mois
ture
+10 dB
+3 dB
TO ANTENNA
INPUT
TO
TO
TO
*SEE NOTE ON CABLES
RECEIVER
RECEIVER
TO
ANTENNA
ANTENNA