Tektronix MDO4104-6 Setup for Jupiter Radio Emissions

Tektronix MDO4104-6 Mixed Domain Oscilloscope spectrum analyzer setup for monitoring the Jupiter decametric radio emission from 17.5 MHz to 24 MHz.

17.5 MHz start frequency
20.75 MHz center frequency
24 MHz stop frequency
6.5 MHz frequency span
6.5 MHz capture bandwidth
100 Hz resolution bandwidth
650 kHz per horizontal division
-40 dBm reference level
5 dBm per vertical division
5 vertical divisions off set
Clock is set to UT, local time is PST (UT -8 hours), USA
The white spectrum trace is an average of 16 spectrums.
The yellow or gold spectrum trace is a single normal spectrum.

Setting spectrum analyzer reference level to -40dBm and adjusting the vertical scale to position the spectrum trace at the bottom with 5.0 dB/division.

Tektronix MDO4104-6 Setup for Jupiter Radio Emissions

Setting spectrum analyzer trace to normal.

Setting normal trace detection method to average.

Turning on the spectrogram function. The spectrogram has just started to fill the top spectrogram window.

Spectrogram running.

Radio Equipment

Tektronix MDO4104-6 Mixed Domain Oscilloscope 50 kHz to 6 GHz spectrum analyzer.
Second Mini-Circuits 21.4 MHz coaxial bandpass filter 19.2 to 23.6 MHz. This filter prevents overloading the spectrum analyzer during the day with strong stations.
- Performance data
- Performance curves
Mini-Circuits ZFL-500LN+ Coaxial Low Noise Amplifier minimum 24 db gain, noise figure 2.9 dB typical, 0.1 to 500 MHz, flatness +/-0.5 dB total range, powered with 15 VDC.
- Performance data
- Performance curves
First Mini-Circuits 21.4 MHz coaxial bandpass filter 19.2 to 23.6 MHz. This filter prevents overloading the low noise amplifier during the day with strong stations.
- Performance data
- Performance curves
Radiowavz 15-DP11 15M dipole antenna with 1:1 Balum, The Balum matches the unbalance RG6 coax to the balance dipole antenna.
- Tuned to 20.1 MHz with RigExpert AA-54 HF antenna analyzer

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