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External Oscilloscope (iView) Characteristics
Table 20: External oscilloscope (Integrated View or iView) characteristics (cont.)
Characteristic
Description
3 ns
Logic analyzer triggers external
oscilloscope
(2 ns + logic analyzer sample
external oscilloscope
sample period)
Time correlation uncertainty
6
(
Typical at system trigger)
5 ns
External oscilloscope triggers logic
analyzer
(4 ns + logic analyzer sample
external oscilloscope
sample period)
1
If RAM is less than 256 MB, the record length of the external oscilloscope may be limited to 1 M.
2
An GPIB extender is needed to connect the iView cable to the oscilloscope. One end of a standard GPIB cable can be used.
3
If you encounter possible alignment problems with the logic analyzer and oscilloscope waveform edges, refer to Aligning Logic Analyzer and Oscilloscope
Waveform Edges. (See page 20,
Aligning Logic Analyzer and Oscilloscope Waveform Edges
4
A GPIB to USB adapter (TEK-USB-488) is required to connect the iView cable to the oscilloscope.
5
When used with a TLA7016 mainframe and an external PC (such as TLA7PC1), the instruments must be physically located close together so that the iView
cable can span both instruments. Removing the sleeving from the iView cable assembly increases the spacing distance available between the external
PC and the TLA7016 mainframe.
6
Includes sampling uncertainty, typical jitter, slot-to-slot skew, and probe-to-probe variations to provide a typical number for the measurement.
Aligning Logic Analyzer
and Oscilloscope
Waveform Edges
The
fi
rst time that you take an acquisition after changing the horizontal scale
setting on TDS1000, TDS1000B, TDS2000, or TDS2000B series oscilloscopes,
the logic analyzer and oscilloscope waveform edges may not be aligned within
the listed speci
fi
cation. You can realign the waveform positions in the waveform
window that contains the oscilloscope data (Menu bar > Data > Time Alignment).
Make sure that the external oscilloscope is the data source and then adjust the time
offset to align the waveforms. Use the following approximate offsets for various
horizontal scale settings. (See Table 21.)
Table 21: TDS1000, TDS1000B, TDS2000, and TDS2000B Series oscilloscope
waveform edge alignment
Horizontal scale
Time offset
100 ns
–5 ns
250 ns
–11 ns
500 ns
–18 ns
1
μ
s
–12 ns
2.5
μ
s
–50 ns
5
μ
s
–120 ns
10
μ
s
–250 ns
25
μ
s
–650 ns
20
TLA5000 Series Product Speci
fi
cations & Performance Veri
fi
cation