Introduction 3
Before using the Handyscope HS4 first read chapter 1about safety.
Many technicians investigate electrical signals. Though the measurement may not
be electrical, the physical variable is often converted to an electrical signal, with
a special transducer. Common transducers are accelerometers, pressure probes,
current clamps and temperature probes. The advantages of converting the phys-
ical parameters to electrical signals are large, since many instruments for examin-
ing electrical signals are available.
The Handyscope HS4 is a portable four channel measuring instrument. The Handy-
scope HS4 is available in several models with different maximum sampling rates.
The native resolution is 12 bits, but user selectable resolutions of 14 and 16 bits
are available too, with reduced maximum sampling rate:
resolution Model 50 Model 25 Model 10 Model 5
12 bit 50 MSa/s 25 MSa/s 10 MSa/s 5 MSa/s
14 bit 3.125 MSa/s 3.125 MSa/s 3.125 MSa/s 3.125 MSa/s
16 bit 195 kSa/s 195 kSa/s 195 kSa/s 195 kSa/s
Table 3.1: Maximum sampling rates
The Handyscope HS4 supports high speed continuous streaming measurements.
The maximum streaming rates are:
resolution Model 50 Model 25 Model 10 Model 5
12 bit 500 kSa/s 250 kSa/s 100 kSa/s 50 kSa/s
14 bit 480 kSa/s 250 kSa/s 99 kSa/s 50 kSa/s
16 bit 195 kSa/s 195 kSa/s 97 kSa/s 48 kSa/s
Table 3.2: Maximum streaming rates
With the accompanying software the Handyscope HS4 can be used as an oscil-
loscope, a spectrum analyzer, a true RMS voltmeter or a transient recorder. All
instruments measure by sampling the input signals, digitizing the values, process
them, save them and display them.
3.1 Sampling
When sampling the input signal, samples are taken at fixed intervals. At these in-
tervals, the size of the input signal is converted to a number. The accuracy of this
number depends on the resolution of the instrument. The higher the resolution,
Introduction 5
