Page 44 of 110
Operation/Programming
2.3.3 Frequency
(not shown if Primary Parameter selected for DCV, DCR or DCI)
This function allows the user to program the frequency of the AC test signal between 20Hz and
1MHz using two different methods. When the Utility function
Freq. Edit Type
is selected for
Discrete
, selection is made from 15 possible frequencies selections over this range, or when
Freq. Edit Type
is selected for Continuous, the frequency can be selected in increments of 1Hz
below 100kHz and increments of 10Hz above 100kHz. Refer to Utility functions, paragraph 2.5
for information on the frequency edit type. When discrete is selected the 16 possible
frequencies are: 20, 50, 100, 200, 400, 500Hz, 1, 2, 5, 10, 20, 50, 100, 200, 500kHz, and 1MHz
Up
or
Down
arrow key
to change frequency
Right
arrow key to program
next parameter
or
PROGRAM
key to exit Program
Mode and return to Ready mode.
2.3.4 Amplitude
This function allows the user to program the ac test voltage amplitude between 20 mV and
1.0000 V in 5 mV steps. The programmed voltage is maintained at the instrument terminals with
the terminals open, but not necessarily at the DUT. The actual voltage across the DUT is never
more than the programmed voltage, and depends on the DUT impedance and source resistance of
the 1910, which can be 5
, 25
50
or 100
. Refer to Utility functions, paragraph 2.5.6 for
information on the source impedance. The instrument source resistance must be taken into
consideration especially when measuring low values of impedance (low inductance or high
capacitance). For example, if the programmed amplitude voltage is 1V, the source resistance
set for 50
, and the impedance of the unknown DUT 50
, the voltage across the DUT is not 1V
but rather 0.5V.
1 Frequency Program
1.0000 KHz
1 Frequency Program
20.000 Hz
1 Frequency Program
1.0000 MHz
20 Hz to 1 MHz
Summary of Contents for 1910
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Page 107: ...Theory Page 103 of 110 Figure 4 4 Detector Circuits Es IL Ex PL PH Voltage Current...
Page 108: ...Page 104 of 110 Theory Figure 4 5 Digital Signal Processor Es Ex CPU DSP A D Vin A Vin B...