Amplifier Research 75A250A RF Amplifier Used Tested in Good Conditions

Amplifier Research 75A250A RF Amplifier Used Tested in Good Conditions

Description of Amplifier Research 75A250A RF Amplifier

The Amplifier Research 75A250A amplifier is a portable, self-contained, air-cooled, broadband, solid state amplifier unit designed for laboratory applications where instantaneous bandwidth, high gain and moderate power output are required. When used with an RF sweep generator, the 75A250A will provide a minimum of 75 watts of swept RF output power. The Model 75A250A includes a front panel RF Gain Control, which permits the operator to conveniently set the amplifier's desired output level. The digital display on the front panel indicates the operation status and any pending fault conditions when an over temperature or power supply fault has occurred.

The Model 75A250A amplifier is a portable, self-contained, air-cooled, broadband, solid state amplifier unit designed for laboratory applications where instantaneous bandwidth, high gain and moderate power output are required. Utilization of push-pull MOSFET circuitry lowers distortion, improves stability and allows operation into any load impedance without damage. When used with an RF sweep generator, the 75A250A will provide a minimum of 75 watts of swept RF output power.
The Model 75A250A includes a front panel RF Gain Control, which permits the operator to conveniently set the amplifier's desired output level. Housed in a stylish contemporary enclosure, the unit provides instantaneous power for typical applications such as RF susceptibility testing, antenna and component testing, Watt-meter calibration and as a driver for higher power amplifiers. The 75A250A is powered by a high efficiency switching supply, with autoranging AC input circuitry which will automatically accept voltages from 90 to 135 VAC, or from 180 to 270 VAC, in the 47 to 63 Hz frequency range. The RF Amplifier stages are protected from over temperature by removing the DC voltage to them if an over temperature condition occurs due to a cooling blockage or fan failure. The digital display on the front panel indicates the operation status and any pending fault conditions when an over temperature or power supply fault has occurred. The unit can be returned to normal operation when the condition has been cleared; as with the other functions, this can be readily accomplished through a front panel switch. The unit also includes digital control for both local and remote control of the amplifier. The 8-bit RISC microprocessor controller board provides IEEE-488 (GPIB) and
asynchronous full duplex RS-232 communication control of all amplifier functions.

Features

• Frequency: 10 kHz - 250 MHz
• Rated Output Power: 75W
• Gain: 49 dB min
• Noise Figure: 16 dB typical

SPECIFICATIONS, MODEL 75A250A
POWER OUTPUT, CW

Nominal ................................................................100 watts
Minimum ...............................................................75 watts
Linear @ 1 dB compression ....................................50 watts minimum
FLATNESS ..................................................................... 1.0 dB maximum
FREQUENCY RESPONSE ...............................................10 kHz - 250 MHz instantaneously
INPUT FOR RATED OUTPUT ..........................................1.0 milliwatt maximum
GAIN (at maximum setting) ...........................................49 dB minimum (See model configurations)
GAIN ADJUSTMENT (continuous range) .........................18 dB minimum
INPUT IMPEDANCE .......................................................50 ohms, VSWR 1.5:1 maximum
OUTPUT IMPEDANCE ...................................................50 ohms, VSWR 2.0:1 maximum
MISMATCH TOLERANCE* ..............................................100% of rated power without foldback. Will operate without damage or
oscillation with any magnitude and phase of source and load
impedance. *See Application Note #27
MODULATION CAPABILITY ...........................................Will faithfully reproduce AM, FM, or pulse modulation appearing on
the input signal
NOISE FIGURE (above 1.0 MHz) ....................................16 dB typical
HARMONIC DISTORTION .............................................Minus 20 dBc maximum at 50 watts
THIRD ORDER INTERCEPT POINT ..................................57 dBm typical
PRIMARY POWER ..........................................................90-135/180-270 VAC
....................................................................................47 to 63 Hz, single phase 400 watts maximum
CONNECTORS
RF ..........................................................................Type N female. See Model Configurations table below for location.
REMOTE CONTROL
IEEE-488 .............................................................24 pin female
RS-232 ...............................................................9 pin subminiature D (female)
REMOTE INTERLOCK ....................................................15 pin subminiature D
COOLING ....................................................................Forced air (self contained fans)

1.Can you ship order to Canada or Australia?
Yes,we can .We send orders worldwide.

2. What delivery method do you use? and delivery time?

We can ship by EMS,DHL,FedEx,UPS,TNT with tracking number. Usual delivery time is 4-7 workdays.

3. What is your payment term?

100% T/T payment before shipment.

4. How can I ask any other question?

You can contact us online or leave us messages below.

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