Com-Power PAM-118A User Manual

Features

Preamplier

PAM-118A

Ultra Wideband -

High Gain -

Flat Response -

Low Noise Figure -

P

@ 1 dB Gain Compression -

out

Battery Powered

Description

The PAM-118A is a wideband, high gain, bench top
microwave preamplier. The PAM-118A has a fre­quency range of 500 MHz to 18 GHz. This preamplier
is primarily intended for EMC applications; However,
it may be used for other application that require low
noise and high signal amplication.

The simple front panel consists of two 50 Ohm
matched precision N-connectors for input and out­put. The preamplier was designed to have at gain
with minimal variation over the entire frequency
range. The at gain helps in taking fast adhoc read­ings during troubleshotting, R&D phase. The high
gain and low noise gure of PAM-118A increases
system sensitivity of eectively all measurement
systems. It is very eective in measuring low level
signals during Electromagnetic Interference (EMI)
testing. It has low VSWR and high reverse isolation.

Each preamplier is individually calibrated using
equipment traceable to National Institute of Stan­dards and Technology. Individual data and certicate
of calibration is shipped with each unit. The PAM­118A is battery powered to avoid any noise eects
of power cables. It can also be powered by 15 VDC,
500 mA power adapter (provided with the unit).

500 MHz to 18 GHz

40 dB minimum

+ 2.5 dB

3 dB max

+12 dBm

Application

The PAM-118A preamplier increases system sensitiv­ity enhancing the capability of measurement system
to measure low level signals. It also provides input
isolation to your spectrum analyzer or receiver.

During EMC measurements the antennas are usu­ally placed at a distance of 1 to 10 meters from the
equipment under test. Most antennas operating
above 1 GHz typically have high antenna factors.
In addition, the long interconneting cables, espe­cially operating in the microwave frequencies have
high cable loss. These factors makes it dicult to
distinguish low level signal from the noise oor of
the spectrum analyzer / receiver. The preamplier
improves system sensitivity by amplifying the signals
before they reach the spectrum analyzer / receiver
input thereby improving the signal to noise ratio.

The system sensitivity can be further improved by
connecting the preamplier as close as possible
to the the antenna output. This eliminates the at­tenuation of the signal due to long cable length
before the preamplier gets a chance to amplify it.
The reduced cable length from antenna output to
preamplier input drastically improves the overall
system sensitivity. The battery powered PAM-118A
allows placing the preamplier very close to the
receiving antenna without possible introduction of
interference from power cables.

Com-Power Corporation 114 Olinda Drive, Brea, California 92823 (714) 528 - 8800 www.com-power.com

Rev: A, Issue: 11-12

Specications

30

35

40

45

50

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Gain (dB)

Frequency (GHz)

Frequency Range 500 MHz to 18 GHz
Gain 40 dB
Gain atness + 2.5 dB

RF Input/output

VSWR ( Input/Output) 2.2:1 (max)
Noise Figure
Pout @ 1dB comp +12 dBm (min)
DC input 0 Vdc (max)
Reverse isolation 40 dB (typical)
DC Power supply +15Vdc, 500 mA
Size 7.7 x 6.5 x 3.2 inches (184 x 156 x 77 mm)
Weight 2.5 lbs (1.1 Kg)

All values are typical values unless otherwise specied.
Specications are subject to change without notice.

50Ω Precision N- type female

<3 dB @ 25

o

c

Preamplier

PAM-118A

Preamplier Gain (typical)

Com-Power Corporation 114 Olinda Drive, Brea, California 92823 (714) 528 - 8800 www.com-power.com

Rev: A, Issue: 11-12