EMI-PREAMP (Com-Power PAM-103 offered by Tektronix)

Preamplifier for Tektronix EMC pre-compliance

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The EMI-PREAMP preamplifier is intended for improving measurement system sensitivity during EMC compliance testing. With a frequency range of 1 to 1000 MHz and a gain of 33 dB, it amplifies the signals that were previously hidden below the noise floor of the EMI receiver so that they can be seen and measured. The preamplifier has a gain variation of ±3 dB for the entire frequency range to reduce measurement errors. It can be powered by the rechargeable NimH batteries included when an external power source is not available.

Key features
  • Wide frequency range (1 MHz to 1 GHz)
  • Internal battery or AC adapter operation (>13 hours per charge)
  • High gain, low noise figure (33 dB Gain (typical)) (3.3 dB noise figure)
  • Individual calibration included


Frequency range
1 MHz –1 GHz
Preamplifier gain
33 dB (3 dB)


Linear RF input range
< -30 dBuV – 89 dBuV
POUT at 1 dB compression
18.3 dBm
POUT at 3 dB intercept (IP3)
32 dBm
Noise figure
< 3.3 dB
Input sensitivity
-30 dBuV (< 31.6 nV)
RF input/output ports
50 Ω N-type (female)
Return loss (RF input/output ports )
29.5 dB (minimum), 44 dB (average)


VSWR (RF input/output ports)
1.69:1 (maximum), 1.25:1 (average)


Reverse isolation
>40 dB (output port to input port)


Operating temperature
0° to 40° C (32° to 104° F)
Maximum RF input ratings
107 dBμV (225 mV), 0 dBm (1 mW), 2 VDC
Power supply (input)
100 to 240 V AC, 50/60 Hz; IEC60320 C14 receptacle
Power supply (output)
+ 15 V ±1%; 4 A maximum
Battery runtime
>13 Hours (with new, fully-charged batteries)
6 cm x 16.7 cm x 21 cm
1.45 kg
Last Modified: 2018-02-08 04:00:00

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