Rev D
1
1.
GENERAL INFORMATION
1.1 GENERAL DESCRIPTION
The Model 250S1G6 is a self-contained, broadband microwave amplifier designed for laboratory applications
where instantaneous bandwidth, high gain, and moderate power output are required. A
GAIN
control, which
is conveniently located on the unit’s front panel, can be used to decrease the amplifier’s gain by 10 decibels
(dB) or more. Solid state technology is used exclusively to offer significant advantages in reliability and cost.
A Model 250S1G6, used with a frequency-swept signal source, will provide 250 watts of swept power output
from 0.7–6.0 gigahertz (GHz). Typical applications include antenna and component testing, wattmeter
calibration, and electromagnetic interference (EMI) susceptibility testing, as well as usage as a driver for
frequency multipliers and high-power amplifiers. The Model 250S1G6 can be operated locally by using the
unit’s front panel controls, or remotely by using the unit’s IEEE-488, RS-232 interface, USB, or Ethernet
interface.
Special features incorporated into the Model 250S1G6 include the following:
•
A Digital Control Panel (DCP)
that allows both local and remote (via a computer interface) control of
the amplifier (including adjustment of the amplifier’s RF Gain during CW mode operation) and provides
graphical displays of the amplifier’s Forward and Reflected power levels.
•
RF output level protection.
•
A General Purpose Interface Bus (GPIB)/IEEE-488.2 interface
for remote control of the amplifier’s
operating functions.
•
RS232 serial communications
including both wire and fiber-optic ports
for remote control.
•
USB Communication port
for remote control.
•
Ethernet Communication port
for remote control.
•
Protection
is provided by DC current limiting, over-temperature shut down and RF power limiting.
1.2 SPECIFICATIONS
Refer to the AR RF/Microwave Instrumentation Data Sheet at the end of this section for detailed
specifications.
1.3 POWER SUPPLIES
The Model 250S1G6 contains three switching power supplies. The input voltage range to the power supplies
is 200–250 VAC, 50-60Hz, selected automatically. The AC input power, combined for these three supplies is
approximately 2500 watts typical.
PS1 has a +5 volt, standby supply for the A34 Control Panel assembly and the A37 Interface assembly used
for the remote interfaces. The +5 volt supply is also for operation of the A30 ALC board and the A32 Fan
Control assembly.
PS1 is a multiple output supply. The main +24.5V supplies voltage to the quad amps. The +24V, 7A is for
operating the cooling fans and the –24 volts DC is supplied to the (A31) Regulator board and the A1
preamplifier.
