Agilent Technologies InfiniiVision 4000 X-Series, Programmer'S Manual

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240 Agilent InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide
7
:ACQuire Commands
:ACQuire:TYPE
(see page 1208 )
Command Syntax
:ACQuire:TYPE <type>
<type> ::= {NORMal | AVERage | HRESolution | PEAK}
The :ACQuire:TYPE command selects the type of data acquisition that is to
take place. The acquisition types are:
• NORMal — sets the oscilloscope in the normal mode.
• AVERage — sets the oscilloscope in the averaging mode. You can set the
count by sending the :ACQuire:COUNt command followed by the number
of averages. In this mode, the value for averages is an integer from 1 to
65536. The COUNt value determines the number of averages that must
be acquired.
The AVERage type is not available when in segmented memory mode
(:ACQuire:MODE SEGMented).
• HRESolution — sets the oscilloscope in the high- resolution mode (also
known as
smoothing ). This mode is used to reduce noise at slower
sweep speeds where the digitizer samples faster than needed to fill
memory for the displayed time range.
For example, if the digitizer samples at 200 MSa/s, but the effective
sample rate is 1 MSa/s (because of a slower sweep speed), only 1 out of
every 200 samples needs to be stored. Instead of storing one sample
(and throwing others away), the 200 samples are averaged together to
provide the value for one display point. The slower the sweep speed,
the greater the number of samples that are averaged together for each
display point.
• PEAK — sets the oscilloscope in the peak detect mode. In this mode,
:ACQuire:COUNt has no meaning.
The AVERage and HRESolution types can give you extra bits of vertical
resolution. See the
User's Guide for an explanation. When getting
waveform data acquired using the AVERage and HRESolution types, be
sure to use the WORD or ASCii waveform data formats to get the extra
bits of vertical resolution.
Query Syntax
:ACQuire:TYPE?
The :ACQuire:TYPE? query returns the current acquisition type.
Return Format
<acq_type><NL>
N O T E
The obsolete command ACQuire:TYPE:REALtime is functionally equivalent to sending
ACQuire:MODE RTIME; TYPE NORMal.