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The CS448 is a unique isolated four-channel 200MHz
14-bit oscilloscope designed to measure high voltage, fast slew-rate signals such as those
in a full or three-phase power electronic switching bridge.
Fairport, NY, USA: Saelig Company, Inc. has introduced
Cleverscope CS448, a unique isolated high common-mode rejection ratio (CMRR) four-channel
200 MHz 14-bit oscilloscope. It has been designed to measure high voltage, fast slew-rate
signals such as those in a full or three-phase power electronic switching bridge (e.g. gate
drives to measure voltage and charge, power switching to measure loss and parasitic stress,
output signals to measure power and spectrum for EMC compliance, control system signals for
gain/phase and stability, etc.) The CS448 includes a built-in isolated 65 MHz signal
generator to provide stimulus signals, and eight isolated 100 Mb/s logic inputs to measure
digital control signals. The CS448 has 110 dB frequency domain dynamic range using its
14-bit ADCs, which is ideal for EMI and frequency response analysis. Two CS448's can be slaved
to make an 8 channel oscilloscope with coherent sampling.
The CS448 has been designed from the ground up to accurately measure small voltages while
exposed to large (<1000 V) swings. While the input ranges available are +/-0.8 V
and +/-8.0 V, attenuating probes are used to extend the input range up to 800 V.
The application software automatically scales the values to adjust for probe attenuation.
Sampling at 500 MSa/s, all 4 channels are phase aligned with better than +/-140 ps
skew so the CS448 can be used for impedance and gain/phase measurement. The CS448 provides
coherent measurements of the channel inputs and the built-in tracking generator. The signal
generator has >110 dB CMRR at 50 MHz, with a working isolation between the output
and ground of 800 VRMS. The high CMRR and the isolated design allow high-side gate drives
to be measured without large unwanted common mode artifacts. Dead time, pulse timing, gate
charge characteristics, and parasitics can all be observed.
The CS448's free application software allows a USB or Ethernet connected Windows PC to
provide operating controls and display. A built-in Link Port is used for controlling Cleverscope
accessory devices such as the CS1070 1 A 50 MHz power amplifier, or the CS1110 VCE
Sat Probe. The CS448 also includes RS232, SPI and I2C ports for the control of other user
With optically-isolated channels, a high dynamic range and an internal signal generator,
this combination in the CS448 is targeted for measuring power switching values, carrying out
tradeoff analysis, and verifying the design and operation of power electronics designs. Designed
and made in New Zealand by Cleverscope, an innovative test equipment manufacturer, to be compact
in size (9.75" x 6.5" x 2.2") and weight (5.5lb), the CS448 is available now at $9600 from
About Saelig Company, Inc.
Founded in 1988 in Rochester, New York, Saelig is a North American distributor with a growing
reputation for finding and sourcing unique, easy-to-use control and instrumentation products
and related active components, for use in a variety of industries. Products lines are continuously
added from sources across the globe, and are offered at highly competitive prices, accompanied
by full in-house technical support, exceptional customer service, and fast delivery. For full
details of available product lines, please visit
Saelig Company, Inc.
71 Perinton Parkway
USA Toll-Free: (888) 7-SAELIG
Tel: (585) 385-1750
Posted July 11, 2017