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4-1-5. Set the Record Length
Background
The number of samples that can be stored is set
by the record length. Record length is important in
an oscilloscope as it allows longer waveforms to be
recorded and/or allows higher sampling rates to be
achieved when equivalent time sampling is used.
There are two record length settings, Auto and
Short. The Auto setting will set the record length to
maximum record length available, dependent on
the scope settings. The Short setting will set the
record length to 1k.
The maximum record length for the DCS-9700
depends on the number of active channels, which
channels are active, and whether the normal or
single shot triggering mode is used. The table
below describes the record lengths that are
available for each triggering mode.
Channel Setting
Trigger Mode
Single Normal Auto
CH1 on
2M
1M
1M
CH2 on
2M
1M
1M
CH3 on
2M
1M
1M
CH4 on
2M
1M
1M
CH1, CH3 on
2M
1M
1M
CH1, CH4 on
2M
1M
1M
CH2, CH3 on
2M
1M
1M
CH2, CH4 on
2M
1M
1M
CH1, CH2 on
1M
500k
500k
CH3, CH4 on
1M
500k
500k
CH1, CH2, CH3 on
1M
500k
500k
CH1, CH2, CH4 on
1M
500k
500k
CH2, CH3, CH4 on
1M
500k
500k
CH1, CH3, CH4 on
1M
500k
500k
CH1, CH2, CH3, CH4 on 1M
500k
500k
Panel Operation 1. Press the
Acquire
key.
Acquire
2. Press the
Record Length
key on
the bottom menu and choose
Auto
or
Short
mode.
Note
The sampling rate may also be changed when the
record length is changed.
