Motorola SG 2000 用户手册
B e n c h S e t u p
3 - 3
S G 2 0 0 0 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
P o w e r i n g t h e N o d e
You can conveniently power the SG 2000 by applying 60 Vac or 90 Vac to housing port 2. This port
is not used for RF purposes. All ports are rated at 15 amperes maximum and are fused with common,
blade-type 20-ampere automotive fuses. The 10-ampere fuse protects the dc power supply wiring
and can also be used to disconnect ac power from the power supply.
is not used for RF purposes. All ports are rated at 15 amperes maximum and are fused with common,
blade-type 20-ampere automotive fuses. The 10-ampere fuse protects the dc power supply wiring
and can also be used to disconnect ac power from the power supply.
In addition to providing overcurrent protection, fuse locations also determine the paths for ac
bypassing through the housing.
bypassing through the housing.
Figure 3-3 diagrams fuse configurations for ac and dc powering:
F i g u r e 3 - 3
F u s e c o n f i g u r a t i o n
F u s e c o n f i g u r a t i o n
RF chassis
Housing
IN
AC port
Port 1
Port 2
Port 3
Port 1
F3
20 Amp
F1
20 Amp
F2
20 Amp
F5
20 Amp
F7
Jumper
F6
20 Amp
OUT
Unused
Port 2
Port 4
Port 4
Port 3
SG2-PIC
SG2-SIC
DC power
supply 1
JP1
Pos 2
Pos 1
SG2 lid assembly
F4
10 Amp
DC power
supply 2