HP 34401A, User Manual

Page: 114 / 236

Using the
range
and
resolution
Parameters
With the
MEASure?
and
CONFigure
commands, you can select the
measurement function, range, and resolution all in one command.
Use the
range parameter to specify the expected value of the input
signal. The multimeter then selects the correct measurement range.
For frequency and period measurements, the multimeter uses one
“range” for all inputs between 3 Hz and 300 kHz. The range parameter
is required only to specify the resolution. Therefore, it is not necessary
to send a new command for each new frequency to be measured.
Use the resolution parameter to specify the desired resolution for
the measurement. Specify the resolution in the same units as the
measurement function,
not in number of digits . For example, for
dc volts, specify the resolution in volts. For frequency, specify the
resolution in hertz.
You must specify a range to use the resolution parameter.
Using the READ? Command
The
READ?
command changes the state of the trigger system from the
“idle” state to the “wait-for-trigger” state. Measurements will begin
when the specified trigger conditions are satisfied following the receipt
of the
READ?
command. Readings are sent immediately to the output
buffer. You must enter the reading data into your bus controller or the
multimeter will stop making measurements when the output buffer
fills. Readings
are not stored in the multimeter’s internal memory when
using the
READ?
command.
Sending the READ? command is like sending the INITiate command
followed immediately by the FETCh? command, except readings are not
buffered internally.
Chapter 4 Remote Interface Reference
Simplified Programming Overview
114