v2.13 Cleverscope CS300 Reference Manual
©Cleverscope 2004-2018 www.cleverscope.com Page 97
The +/- 24V DC offset capability of the input to the CS328A means you can measure the response down to DC
in power supplies of up to +/-24V. For higher voltage power supplies use AC coupling (with a lower frequency
limit of 5Hz (1x probe) or 0.5 Hz (10x probe), or use a CS1030 Differential Probe.
The FRA Control Panel makes it easy to set up everything in one place - you don't need to know how to use the
rest of the Cleverscope system. On the panel are controls for you to measure Power Supply parameters such as
Gain/Phase, Input and Output Inductance and PSRR, as well as the Capacitance, Inductance, Effective Series
Resistance, Dissipation Factor and the Quality Factor of components. Using the FRA Control Panel you can fully
evaluate a transformer’s transfer response, the primary and secondary inductances, the leakage inductance and
inter-winding capacitance, overall frequency behaviour. Using DC offset you can check saturation and DC
sensitivity. You don't need to buy an expensive Network Analyser because the Cleverscope FRA does all this for
you over a 0-65Mhz frequency range! The Scope Display is useful in being able to see the signal, and check
that you are not over-driving a power supply under test.
17.1 Where to next?
Please read the next two sections to get an overview of using the FRA - particularly on power supplies.
The Frequency Response Analyser (FRA) Control Panel is described next. Note that you can click the button
on each panel to get information on that panel.
Finally we have some examples which may be of help. There are further video examples on our website at
http://www.cleverscope.com/fra/.
17.2 Connections
Connections for each type of test are shown in the connection diagrams.
However for the CS1070, you must also connect the CS1070 link cable between the CS320A/CS328A link port,
and the CS1070 Mini-din port.
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