The Cleverscope CS448 is a unique isolated
high common-mode rejection ratio (CMRR) four-channel 200MHz 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 65MHz
signal generator to provide stimulus signals, and eight isolated 100Mb/s logic
inputs to measure digital control signals. The CS448 has 110dB frequency domain
dynamic range using its 14-bit ADC's, 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 (<1000v 800v.="" and="" are="" attenuating="" available="" extend="" input="" probes="" range="" ranges="" span="" style="margin: 0px;" swings.="" the="" to="" up="" used="" while=""> The application software
automatically scales the values to adjust for probe attenuation. Sampling at
500MSa/s, all 4 channels are phase aligned with better than +/-140ps 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 >110dB CMRR at 50 MHz, with a working isolation between the output and
ground of 800VRMS. 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 1A 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 equipment.
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 Saelig Company, Inc. Fairport NY at $1758.00. Saelig Company Inc.
1-888-7SAELIG info@saelig.com
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