SMT-Pro Station Monitor

From: $259.00

NIST Calibration Certificate

3 in stock


The SMT-Pro Station Monitor is recommended for both QRP (low power) and QRO (high power) operation. When connected to a low cost oscilloscope, it allows the adjustment and tuning of the entire transmitting chain including the transceiver, RF amplifier, and other components. It is designed for transceiver output levels of up to 100 WattsĀ driving linear RF amplifiers. It features a wide band sampler, a high performance demodulator, a variable base band output and an oscilloscope trigger output.

A Linear RF amplifier commonly amplifies an RF signal from 20-100 Watts by 20dB or more to aboutĀ 500-1,500 Watts. With a low cost oscilloscope, many found on eBay, the SMT-Pro makes a complete high performance station monitor for SSB & AM modes.


datasheet SMT-Prov2

Appnote 1 Trapezoid test(2)

Appnote 6 Station montor selection(2)

Appnote 4 Power t




Additional information

Weight 1 lbs
Dimensions 4 × 3 × 1.2 in
Specifications RF

Maximum RF IN: 200W PEP with crest factor of 4: 1 Isolation RF IN/OUT to DEMOD OUT: > 50dB Insertion loss: Negligible VSWR : Less than 1.1:1 Return loss: >25dB Impedance DEMOD RF IN/OUT: 50ohms

Specifications Demodulator

Baseband RF detection: AM and SSB Spurious THD: < -60dB Linearity: .5-100 Watt 1-98% Rise/fall time: < 10us aberrations less than 5% Output coefficient: -20dB externally variable Impedance DEMOD OUT: 47K Impedance TRIGGER OUT: 47K


Generate a baseband signal for the oscilloscope X (horizontal) input by demodulating SSB and AM signals when testing transceiver and RF amplifier using the trapezoid method, especially useful for low level (QRP) testing.


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