Motorola SG 2000 用户手册
2 - 1 8 O v e r v i e w
SG 20 00 Ins tal la tion and O pera tion M anua l
Tilt Selection
To use the tilt selection charts, first determine the system operating bandwidth, either 750 MHz or
870 MHz. Next, determine the desired system channel load either 77, 94, or 110 channels. Use the
corresponding bandwidth and channel loading chart to determine the preferred tilt, either low,
standard, or high.
870 MHz. Next, determine the desired system channel load either 77, 94, or 110 channels. Use the
corresponding bandwidth and channel loading chart to determine the preferred tilt, either low,
standard, or high.
Figure 2-11 illustrates the tilt selection chart for 750 MHz bandwidth and 77-channel load:
F i g u r e 2 - 1 1
R e l a t i v e l e v e l d B v e r s u s 7 5 0 M H z s l o p e 7 7 c h a n n e l s
R e l a t i v e l e v e l d B v e r s u s 7 5 0 M H z s l o p e 7 7 c h a n n e l s
-3
50
150
250
350
450
550
650
750
-1
-2
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Frequency, MHz
R
e
lat
iv
e lev
e
l,
d
B
SG2 750 MHz Slope Chart
77 Analog Channels, 200 MHz Digital
Low
Standard
High
Standard
High