Using Probes; Data Acquisition - Agilent Technologies Acqiris DC110 User Manual

3.2.9. Using Probes

The 50 Ω and 1 MΩ input impedance settings make it possible to use Acqiris digitizers with a wide variety of
probes. The 50 Ω setting is most commonly used for active probes and low impedance (500 Ω) passive probes. The
1 MΩ setting is normally used for high impedance probes. While it is possible to use a variety of different
manufacturers high impedance probes we recommend the use of our model P001 Passive Probe. The model P001 is
matched to the Acqiris digitizers to ensure that effects that can reduce measurement quality, such as bandwidth loss
and capacitive loading, are minimized. The P001 features 300 MHz bandwidth, 10 MΩ input impedance and 10:1
attenuation. These specifications make it an excellent choice for most general purpose probing applications. Before
using any Passive Probe with a digitizer care should be taken to check that the probe has been correctly adjusted
(refer to the Probe's Calibration procedure).
NOTE: Passive high impedance probes are not suitable for high fidelity measurements above 100 MHz. The non-
negligible (5-10 pF) tip capacitance loads the signal causing distortion and/or ringing when combined with the
ground lead inductance.
3.3.

Data Acquisition

The table below summarizes the characteristics discussed in the sections that follow:
Model Max.
Sampling
Rate
500 MS/s
DP105
500 MS/s
DP106
1 GS/s
DP110
1 GS/s
DP111
2 GS/s
DP210
2 GS/s
DP211
2 GS/s
DP212
2 GS/s
DP214
1 GS/s
DP235
2 GS/s
DP240
2 GS/s
DP1400
1 GS/s
DC110
1 GS/s
DC135
2 GS/s
DC140
4 GS/s
DC211
4 GS/s
DC211A
2 GS/s
DC240
4 GS/s
DC241
4 GS/s
DC241A
500 MS/s
DC265
1 GS/s
DC270
4 GS/s
DC271
4 GS/s
DC271A
2 GS/s
DC271AR
User Manual: Family of 8-bit Digitizers
Max. Default
CONVER Memory
TERS PER
points/
CHANNEL/
channel
CHANNELS
1 / 1 128K
1 / 1 128K
1 / 1 128K
1 / 1 128K
1 / 1 256K
1 / 1* 256K
1 / 1 256K
1 / 1 256K
2 / 2 128K
2 / 2 128K
2 / 2 128K
1 /1 128K
2 /2 128K
2 / 2 128K
1 / 1 512K
1 / 1 128K
1 / 2 256K
2 / 2 256K
2 / 2 128K
1 / 4 128K
1 / 4 128K
4 / 4 128K
4 / 4 128K
2 / 2 128K
Maximum Maximum
Optional
Segments
Memory/
channel
2M 4000
2M 4000
8M 8000
2M 4000
16M 8000
16M 8000
16M 8000
16M 8000
2M 4000
8M 8000
NA 1000
8M 8000
2M 4000
8M 8000
32M 8000
8M 8000
16M 8000
16M 8000
8M 8000
2M 4000
8M 8000
8M 8000
8M 8000
8M 8000
TTI Timebase External
Clock
Reso- Accuracy
lution Max./
Min.
Thresh.
80 ps 50 ppm ± 2 V
80 ps 50 ppm ± 2 V
80 ps 50 ppm ± 2 V
5 ps 2 ppm ± 3 V
5 ps 2 ppm ± 3 V
5 ps 2 ppm ± 3 V
5 ps 2 ppm ± 3 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 2 V
~13ps 2 ppm AC 0 V
5 ps 50 ppm ± 2 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 3 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 2 V
5 ps 2 ppm ± 2 V
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