AR 150A400, Руководство пользователя

Страница: 4 / 19

Model 150A400 Manual Text
2-1
REV B
SECTION II
OPERATING INSTRUCTIONS
2.1 G
ENERAL
Operation of the Model 150A400 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.
C
AUTION
:
THE 150A400 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 150A400 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. TO
AVOID TRIPPING THE PROTECTION CIRCUIT, THE FOLLOWING PRACTICES ARE
RECOMMENDED:
1.
DO NOT INTENTIONALLY OVERDRIVE THE AMPLIFIER AT ANY TIME. WHEN
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.