The MH648A is a pre-amplifier for improving sensitivity in instruments such as spectrum analyzers, field strength meters, and frequency counters.

Maximum output

120 dB_V (+7 dBm)

Input attenuator

0, 10, 20, 30 dB 1.5 dB

Input/Output connector

50 VSWR: _2.5 (0.5 to 800 MHz) N (S)-type connector

Power supply

AC: 100 V, 50/60 Hz, _10 VA DC: 21 to 30 V, _120 mA

Operating temperature range

0_ to 45_C

Dimensions

210 (W) x 95 (H) x 200 (D) mm

Weight

_3.5 kg

Frequency range 0.1 to 1200 MHz
Gain

30 dB ±1 dB (0.5 to 800 MHz), 30 dB +1.5/6 dB (0.1 to 1200 MHz)

Gain stability

±1.5 dB (0.1 to 800 MHz), ±3 dB (800 to 1200 MHz)

Noise figure

≤6 dB (0.5 to 800 MHz), ≤8 dB (0.1 to 1200 MHz)

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