Motorola SG4-DRT-2X Provozní pokyny Strana 26

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2-12 Overview
SG4000 Installation and Operation Manual
Table 2-2 illustrates the typical padding required for optimum performance with a 79 channel
load.
Table 2-2
SG4000 pad chart-standard gain
Input
dBm/mW
40 41 42 43 44 45 46 47 48 49
2.0/1.6
Receiver JXPs
RF mod JXPs
10
10
10
9
10
8
10
7
10
6
10
5
10
4
10
3
10
2
10
1
1.5/1.4
Receiver JXPs
RF mod JXPs
10
9
10
8
10
7
10
6
10
5
10
4
10
3
10
2
10
1
10
0
1.0/1.3
Receiver JXPs
RF mod JXPs
10
8
10
7
10
6
10
5
10
4
10
3
10
2
10
1
10
0
9
0
0.5/1.1
Receiver JXPs
RF mod JXPs
10
7
10
6
10
5
10
4
10
3
10
2
10
1
10
0
9
0
8
0
0.0/1.0
Receiver JXPs
RF mod JXPs
10
6
10
5
10
4
10
3
10
2
10
1
10
0
9
0
8
0
7
0
–0.5/0.9
Receiver JXPs
RF mod JXPs
10
5
10
4
10
3
10
2
10
1
10
0
9
0
8
0
7
0
6
0
–1.0/0.8
Receiver JXPs
RF mod JXPs
10
4
10
3
10
2
10
1
10
0
9
0
8
0
7
0
6
0
5
0
–1.5/0.7
Receiver JXPs
RF mod JXPs
10
3
10
2
10
1
10
0
9
0
8
0
7
0
6
0
5
0
4
0
–2.0/0.6
Receiver JXPs
RF mod JXPs
10
2
10
1
10
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
–2.5/0.6
Receiver JXPs
RF mod JXPs
10
1
10
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
–3.0/0.5
Receiver JXPs
RF mod JXPs
10
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
For forward segmented 4X padding, see Section 3, “Bench Setup and Operation,” Forward Segmented 4X.
Level Control
The SG4000 has integrated automatic temperature compensation circuitry. There are no user
selectable settings or level set backs required. As the ambient temperature increases or
decreases, the node strives to maintain frequency level stability.
Surge Protection and Powering
The SG4000 is shipped with standard Fast Trigger Electronic Crowbar (FTEC) surge protection.
The FTEC triggers at approximately 230 V and presents a short circuit to the line during
periods of over voltage. After the AC input voltage returns to normal, the FTEC returns to its
open-circuit state. This provides the node with a level of protection against surge currents on
the AC line. The same protector is used for all supplies.
Powering options include standard and redundant common powering. The SG4000 power supply
(SG4-PS) is located in the housing base to optimize heat transfer and to balance the thermal
load between the base and the lid. An umbilical cord connects the SG4-PS to the lid router
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