| Noise&Interference: noise introduction interference(1) interference(2) noisefloor estimation noisefloor measurement | Signals & Bandwidth: measure basics usefull bandwidth bandwidth example cable capacitance | Troubleshooting: Identifying interference what is a (ground)loop ? Interference from equipment groundstrap limitations | Interference spectra: general overview fields in a room Interference from equipment | 
| Current Measurement : basic 2wire/4wire Rshunt versus IV-converter electronic "4Kelvin resistor" noise & bandwidth model noise & bandwidth graph dc-errors model | Voltage Measurement : basic 2wire/4wire 4 wire r-measurement Voltage amp error model | ... | Misc : why use special electronics ? identifying equipment by nr-code basic measurement setups at QT sample-wire filters frequency bands/names (dutch) |