HDR-5000 User and Technical Manual
9
2.5 Installing Antennas and Block Downconverters
To feed the incoming signal to the receiver, you need to properly install the antennas, downconverters,
and associated cabling.
Figure 2-2. Installing the Antenna
Each low-noise block downconverter (BDC) assembly includes a block downconverter, universal pole
mounting bracket and a heavy duty band clamp as shown in the figure. Vislink recommends attaching the
antenna directly to the downconverter. If you do not connect the antennas directly to the downconverters,
you will have to fabricate your own antenna mounting bracket.
CAUTION
Do not install near a UHF transmitter that operates within the 50-800 MHz range,
because the high signal level is received by the UHF cable as though it is an
antenna and causes the HDR-5000 to operate improperly or not at all.
2.6 Installing the HDR-5000
Minimum distance between any two antennas and proper alignment are critical for optimum performance.
You should initially install the antennas at the recommended minimum separation distance. If necessary,
increase the distance by quarter wavelengths. The following table provides minimum separation distances
between any two antennas for several frequency ranges available with the receiver.
Frequency Band
(
Reference Freq
)
MHz
Recommended
Separation
(
cm/inch
)
Adjustment by 1/4
Wavelength
(
mm/inch
)
1700 to 1850 (1700)
52.94
20.84 44.12
1.74
1900 to 2200 (1900)
47.37
18.65 39.47
1.55
2200 to 2500 (2200)
40.91
16.11 34.09
1.34
2300 to 2700 (2300)
39.13
15.41 32.61
1.28
4400 to 4700 (4400)
20.45
8.05 17.05
0.67
4800 to 5000 (4800)
18.75
7.38 15.63
0.62
6400 to 6500 (6400)
14.06
5.54 11.72
0.46
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