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Amplifier Research 100A250A Manual
Model 100A250A
2.1
G
ENERAL
Operation of the Model 100A250A broadband RF amplifier is simple. The input signal, whether swept or
fixed in frequency, is fed into the jack marked "INPUT", and the amplifier's output signal is taken from the
jack labeled "OUTPUT". The unit is turned on by activating the power switch marked "POWER". In the
event of a unit malfunction, protection is provided by an internal circuit breaker. A polarized, three (3) wire
AC power cord is also included with the unit to provide cabinet and chassis grounding to the power mains.
THE 100A250A AMPLIFIER IS NOT CRITICAL IN REGARDS TO SOURCE AND LOAD VSWR AND
WILL REMAIN UNCONDITIONALLY STABLE WITH ANY MAGNITUDE AND PHASE OF SOURCE
AND LOAD VSWR. IT ALSO HAS BEEN DESIGNED TO WITHSTAND, WITHOUT DAMAGE, RF
INPUT POWER UP TO TWENTY (20) TIMES ITS RATED INPUT OF 1mW. HOWEVER, SIGNAL
LEVELS HIGHER THAN 20mW OR TRANSIENTS WITH HIGH PEAK VOLTAGES CAN DAMAGE
THE AMPLIFIER. ALSO, ACCIDENTAL CONNECTION OF THE OUTPUT TO ITS INPUT CAUSES
OSCILLATIONS WHICH WILL PERMANENTLY DAMAGE THE INPUT TRANSISTORS.
WHILE THE MODEL 100A250A WILL OPERATE INTO ANY LOAD IMPEDANCE, THE AMPLIFIER
MAY DRAW EXCESSIVE CURRENT AND SHUT DOWN IF IT IS SIMULTANEOUSLY OVERDRIVEN
WITH AN OPEN OR SHORT CIRCUITED LOAD.
CIRCUIT, THE FOLLOWING PRACTICES ARE RECOMMENDED:
1.
DO NOT INTENTIONALLY OVERDRIVE THE AMPLIFIER AT ANY TIME.
OPERATING INTO A MISMATCHED LOAD, TAKE SPECIAL PRECAUTIONS SO THAT THE
INPUT CANNOT BE INADVERTENTLY OVERDRIVEN.
2.
WHEN CONNECTING AND DISCONNECTING CABLES, TURN THE POWER SWITCH OFF.
CARE MUST BE TAKEN TO PREVENT RESTRICTIONS OF THE COOLING FAN AIR INLET
OPENING ON THE UNIT. RESTRICTIONS OF THE OPENING, FOR EXTENDED PERIODS,
WILL CAUSE OVERHEATING OF THE UNIT AND POSSIBLE PREMATURE FAILURE.
SECTION II
OPERATING INSTRUCTIONS
C
AUTION
:
TO AVOID TRIPPING THE PROTECTION
Manual Text
WHEN
2-1
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