Return Path Alignment; Before You Begin; Table 3-4 Ble*/* Agc Pad Levels - Motorola BLE Series Installation And Operation Manual

3 3 3 3 - - - - 1 2 1 2 1 2 1 2 A m p l i f i e r S e t u p
Table 3-4 provides the AGC pad values for other output levels. Recommended pad values are
shaded.
T a b l e 3 - 4
B L E * / * A G C p a d l e v e l s
B LE */ *
A GC Pa d Min i mu m L ev el
( 1 0 t o 1 4 d B til t ) a t 5 4 7. 2 5 MH z
-
0 0 0 0
1 1 1 1
2 2 2 2
3 3 3 3
4 4 4 4
5 5 5 5
6 6 6 6
7 7 7 7
8 8 8 8
9 9 9 9
10 10 10 10
11 11 11 11
12 12
12 12
13 13 13 13
The use of the ADU or TDU is recommended for improved output level stability although you
can operate the BLE*/* in the manual mode. Select manual mode by placing the drive control
select jumper, illustrated in Figure 2-9, in the
determined by the potentiometer marked
R e t u r n P a t h A l i g n m e n t
The following subsections describe the BLE*/* alignment procedures required for proper
performance in the return path.

Before You Begin

Before you begin to set-up the amplifier and perform return-path alignment, please read the
following instructions and recommendations.
For proper return alignment obtain:
!
RF alignment levels and insertion points for all BLE*/*s
!
RF reference output level of the headend optical receivers
B L E * / * I n s t a l l a t i o n a n d O p e r a t i o n M a n u a l
AD U C on t r ol Ra n g e (d B m V )
Mid p oin t Le vel
a t 5 4 7. 2 5 MH z
35 39
36 40
37 41
38 42
39 43
40 44
41 45
42 46
43 47
44 48
45 49
46 50
47 51
48 52
49 53
MAN
on the amplifier cover.
MAN
Ma x imu m Lev el
a t 5 4 7. 2 5 MH z
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
position. The gain of the BLE*/* is then