User's Manual

-50
-40
-30
-20
-10
0
10
20
30
40
460
470
480
490
500
510
520
530
540
550
560
Ref Level :
40.0 dBmV
dB / Div :
10.0 dB
Spectrum Analyzer
NEW GAIN 30DB
Model: MS2711A Serial #: 00115024
Date: 09/19/2002 Time: 11:04:17
RBW: 1 MHz VBW: 30 kHz Detection: Average
CF: 511.0 MHz SPAN: 100.0 MHz Attenuation: 20 dB
dBmV
Frequency (461.0 - 561.0 MHz)
Figure 3-5: Spectrum at the input to the Hub Transmitter for properly driven IF.
The transmit frequency is a configuration setting for the Downstream upconverter (internal or
external to the W-CMTS).
3.2 Installation Detail – AR1205 Receiver/Antenna
Mount the AR1205 Receiver/Antenna on a vertical pipe with at least 44 vertical inches clear of
unrelated hardware or other impediments. The Receiver mounting brackets will accommodate
pipe from 1.5 to 2.25 inches in outside diameter. Up-tilt or down-tilt is accomplished by means
of adjusting the nuts on the 5/16 inch threaded bolts captive to the mounting assembly. See
Figure 4-4 for mounting details.
The standard carrier frequencies for the Receivers are 5287.2 and 5290.4 MHz. One frequency
must be chosen and specified when ordering.
Ground the Receiver/Antenna to the metallic mounting structure (tower or monopole) or suitable
rooftop ground point according to local codes and installation practices. Normally #6 AWG or
larger wire is utilized for this purpose. A ¼-20 ground bolt is provided on the bottom flange of
the Hub Receiver to attach the ground wire. This is illustrated in Figure 3-6 & 3-7.
June 2003 Page 3-5