Figure 1: The NI 9229, NI 9239, NI 9227, and NI 9238 have a two terminal connector (left) for each measurement channel. Shields are available (right), and recommended, for strain relief and operator keep-outs from connections to active circuits. Figure 2: The NI 9246 and NI 9247 module...
Over the last 1-2 years several radio enthusiasts have mentioned theAmsat QO-100 Es’hail2 stationary satellitebut so far I had no clue where to begin receiving signals from it. There seems to be no shop selling a complete kit so one has to source and assemble the parts. Here’s a vi...
The easiest antenna with a good match is a dipole, but that is a bit more challenging to deploy in the field, so I opted for an end-fed halfway (or EFHW) antenna with a 49:1 transformer. I 3D printed a winder that allowed a BNC connector and the transformer to be mounted on the...
When developing a switching power supply, the output noise has to be set within a certain specification. During production, things like the parts (such as transformer, diode, filtering capacitor and so on) with different material, incorrect assemble, missing parts and so on that cause noise leve...
Figure 1: The NI 9229, NI 9239, NI 9227, and NI 9238 have a two terminal connector (left) for each measurement channel. Shields are available (right), and recommended, for strain relief and operator keep-outs from connections to active circuits. Figure 2: The NI 9246 and NI 9247 module...