RFL Electronics GARD 8000 - Figure 10-12. 9508 RF Chassis Power a Mp Lifier, Power Supply

Power Line Carrier
GARD 8000 SYS RFL Electronics
April 23, 2015 10-22 973.334.3100
shown in Figure 10-7. There must be a 1U minimum space between these chassis for convection
cooling. This additional 3U chassis will contain a total of five modules as follows: a Power Amplifier,
a Power Amplifier Power Supply, a Mother Board, a Tx Filter and an External Amp Connector Board,
as shown in Figure 10-19.
10.8.2 POWER AMPLIFIER POWER SUPPLY
Figure 10-12. 9508 RF Chassis Power Amplifier, Power Supply
As it’s name implies, the Power Amplifier, Power Supply supplies power to the RFL 9508 Power
Amplifier. There are two different types of Power Amplifier, Power Supplies available as shown
below.
Assembly Number
Input Voltage Range
107250-4
38 Vdc to 150 Vdc
107250-5
200 Vdc to 300 Vdc
The 9508 Power Amplifier, Power Supply is a dual output, dc to dc converter. It is a switching power
supply using pulse width modulation. The 107254-4 operates from 38 Vdc to 150 Vdc, and the
107254-5 operates from 200 Vdc to 300 Vdc. Each supply has two outputs, +30 Vdc @ 0.25 Amps and
+92 Vdc @ 2.4 Amps. Both outputs are connected to a common ground. A block diagram of the Power
Supply is shown in below
Figure 10-13. 9508 RF Chassis Power Amplifier, Power Supply
V+
V-
C
NO
NC
INPUT
TRANSIENT
PROTECTION
INRUSH
CURRENT
LIMITING
DRIVE
CIRCUITRY
SWITCHING
TRANS-
FORMER
OUTPUT
FILTERING
+92 Vdc
+30 Vdc
STATION
BATTERY
INPUT
OPTICAL
ISOLATOR
PULSE
WIDTH
MODULATOR