TX7410 Operation Manual
8
The real-world capacitor, resistor and inductor are not ideal, but component of complex
impedance in the form of serial connection or parallel connection. The instrument
calculates necessary values according to equivalent circuit connected in series or parallel.
And different result will be obtained in different circuits, differing in different components.
Two equivalent modes can be conversed through some formulas, and Q and D don’t
change in different modes, as shown in the above figure.
Generally speaking, component with low impedance (such as large capacitor and small
inductor) is usually measured in series mode, and component with high impedance (such
as small capacitor and large inductor) is usually measured in parallel mode. And the
equivalent mode can be decided according to the application of component. If a capacitor
is used for power filtering, series mode is the best choice, and if it’s used for LC
oscillat
circuit, parallel mode should be selected.
2.1.4 Range
Auto, Manual
9 ranges for LCR measurement
2.1.5 Trigger mode
Internal, External, Manual, Bus
Internal:
When the trigger mode is set to INTernal trigger mode, the instrument
continuously repeats measurements.
External:
When the trigger mode is set to EXTernal, the instrument performs a single
measurement every time a low-to-high transition TTL level signal is applied to
the Handler interface on the rear panel.
BUS:
When the trigger mode is set to BUS trigger mode, the instrument performs a
single measurement every time the *TRG common command is sent to TX7410
via GPIB. The BUS trigger mode cannot be set on the front panel. Send the
TRIGger:SOURce BUS command via GPIB or RS232C to set the trigger mode to
the BUS trigger mode.
Manual:
When the trigger mode is set to MANual trigger mode, the instrument performs
a single measurement every time when TRIGGER key on the front panel is
pressed.
2.1.6 Measuremetn delay
Waiting time after measurement completes. If HANDLER interface clear has been set,
signal on HANDLER interface will be cancelled after delay.
