Features and Functions 3
Keysight 34420A User’s Guide 111
Chart Output (Analog Output)
You can use the Chart Output (Analog Output) connector on the rear panel to run
a strip chart recorder or similar instrument. The connector provides an output
voltage proportional to the measured voltage.
– The output can range from –3.00 V to +3.00 V.
– When chart output is disabled (Off), the output is set to 0 V.
– The output impedance is 1 kW.
– The output voltage is related to the input signal as follows:
Note that reading includes the results of measurement unit conversion,
filtering, null, and any math operation performed on the measurement.
– The chart output state (including the span and null values) is stored in
non-volatile memory.
– span cannot have a negative value.
– The chart output has a voltage “rollover” to prevent the loss of data, see
page 113.
Examples:
See page 48 for a menu procedure to enter a number.
1 To set the chart span so that a ±1 mV input signal produces a ±1.0 Volt chart
output:
When chart null is set to 0, the value can be considered the gain and
chart output = gain * reading.
reading chart null–()
span
----------------------------------------- chart output voltage=
0.001 0.0–()
span
-------------------------1.00=
span
0.001
1.00
-----------0.001==
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