A.H. Systems PAM-0118 운영 매뉴얼 - 페이지 6

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A.H. Systems Model PAM-0118 Pre-Amplifier

OPERATING INSTRUCTIONS

The Model PAM-0118 preamplifier is shipped completely assembled. Simply supply the

required 15 Vdc to the preamplifier.

The Model PAM-0118 is a bench top preamplifier. Ordinarily, the preamplifier should be

used near the test equipment, rather than at the antenna. There are a few exceptions,

however, including:

OPERATING INSTRUCTIONS

Operation of the Model PAM-0118 preamplifier is quite simple. The unit is turned on by

first plugging the phone-type plug from an external power supply into the power input

connector. The power supply is then plugged into the appropriate line voltage supply.

Ensure that the preamplifier has sufficient time (15 minutes) to warm up and stabilize.

Pushing the switch to the on position turns on the preamplifier and the power indicator

LED will light. The output signal is taken from the jack marked "OUTPUT" and fed to the

desired amplifier or test equipment. The input signal is connected to the jack marked

"INPUT".

The Model PAM-0118 preamplifier 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. However, input signals greater than -30 dBm are not recommended, as

they will saturate the preamplifier and amplitudes higher than +10 dBm will damage

the preamplifier.

REV B

• Magnetic Loop antennas in quiet locations. These antennas have relatively low

sensitivity or gain. When used in quiet locations, they do not provide much

background noise to the system.

• Long cable runs. If the cable loss is high, performance will improve with the

preamplifier mounted near the antenna.

CAUTION: