Design and Operation
15
3.1.5
Internal Current and Voltage Amplifiers
The output amplifiers are designed as linear amplifiers and direct voltage
coupling with MOSFET output stages.
Using this technology, excellent harmonic distortion and frequency response
specifications can be realized in a very compact design.
The direct voltage coupling allows accurate representation of any transient
function.
Protection of the current and voltage outputs
If a current output is feed externally from one of the voltage outputs, it will not
self-destruct. However, if power is supplied from an external source, the
current output may be destroyed.
The voltage outputs are also protected against overload and sustained short
circuit by means of a fast electronic current limiter and temperature sensors.
Protection against transient overvoltage is effected by means of transient
absorbers.
If two voltage outputs are shorted against each other, the output elements are
brought close to their capacity limits, but they will not be destroyed.
For heat sink temperatures > 167°F (75°C), all outputs are thermally
disconnected (including the outputs on the rear panel of the test set).
Overload displays in the software
At the event of an overload at one of the current or voltage outputs a
corresponding display will be shown in the CMC software.
1
1
This display depends on the software version; for how your software will display these states,
please refer to chapter 3 of the CMC software manual.
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