Agilent Technologies E5382A User manual

A
User’s Guide
Publication number E5382-97002
December 2005
For Safety information and Regulatory information, see the pages at the back of
this guide.
© Copyright Agilent Technologies 2002, 2005
All Rights Reserved.
E5382A Single-ended Flying Lead
Probe Set (for analyzers with 90-pin pod connectors)

2
In This Book
This guide provides user and service information for the E5382A Single-ended
Flying Lead Probe Set.
Chapter 1 gives you general information such as inspection, accessories
supplied, and characteristics of the probe.
Chapter 2 shows you how to operate the probe and gives you information about
some important aspects of probing and how to get the best results with your
probe.

Contents
3
1General Information
To inspect the probe 7
Accessories 8
Characteristics and Specifications 9
General Characteristics 10
To connect and set up the probe set 11
2Operating the Probe
130 ohm Resistive Signal Pin (orange) and Solder-down Ground Lead
16
Input Impedance 17
Time domain transmission (TDT) 18
Step inputs 21
Eye opening 24
5 cm Resistive Signal Lead and Solder-down Ground Lead 27
Input Impedance 28
Time domain transmission (TDT) 30
Step input 33
Eye opening 36
Flying Lead and Ground Extender 39
Input Impedance 40
Time domain transmission (TDT) 41
Step input 44
Eye opening 47
Grabber Clip and Right-angle Ground Lead 50
Input Impedance 51
Time domain transmission (TDT) 52
Step input 55
Eye opening 58
Connecting to coaxial connectors 61
Combining grounds 63

4
Contents

1
General Information

6
E5382A Single-ended Flying Lead Probe Set
The E5382A is a 17-channel single-ended flying lead probe set,
compatible with the Agilent 16753A, 16754A, 16755A, 16756A, 16760A,
and 16950A logic analysis modules. The E5382A enables you to acquire
signals from randomly located points in your target system.
Two E5382As are required to support all 34 channels on one 16760A.
Four E5382As are required to support all 68 channels of one 16753/54/
55/56A or 16950A.
A variety of accessories are supplied with the E5382A to allow you to
access signals on various types of components on your PC board.
Single-ended flying lead probe set and an Agilent 16760A logic analysis module.

7
General Information
To inspect the probe
To inspect the probe
❏Inspect the shipping container for damage.
Keep a damaged shipping container or cushioning material until the contents of
the shipment have been checked for completeness and the instrument has been
checked mechanically and electrically.
❏Check the accessories.
Accessories supplied with the instrument are listed in "Accessories Supplied" in
table later in this chapter.
• If the contents are incomplete or damaged notify your Agilent
Technologies Sales Office.
❏Inspect the probe.
• If there is mechanical damage or defect, or if the probe does not
operate properly or pass performance tests, notify your Agilent
Technologies Sales Office.
• If the shipping container is damaged, or the cushioning materials show
signs of stress, notify the carrier as well as your Agilent Technologies
Sales Office. Keep the shipping materials for the carrier’s inspection.
The Agilent Technologies Office will arrange for repair or replacement
at Agilent Technologies’ option without waiting for claim settlement.
Probe case contents

8
General Information
Accessories
Accessories
The following figure shows the accessories supplied with the E5382A Single-
ended Flying Lead Probe Set.
Accessories supplied
The following table shows the part numbers for ordering replacement parts and
additional accessories.
Replaceable Parts and Additional Accessories
Description Qty Agilent Part Number
Probe Pin Kit 2E5382-82102
High Frequency Probing Kit (4 resistive signal
pins & 4 solder-down grounds)
8E5382-82101
Ground Extender Kit 20 16517-82105
Grabber Clip Kit 20 16517-82109
Right-angle Ground Lead Kit 20 16517-82106
Cable - Main 1E5382-61601
Probe Tip to BNC Adapter 1E9638A

9
General Information
Characteristics and Specifications
Characteristics and Specifications
The following characteristics are typical for the probe set.
Characteristics
(1) refer to specifications on specific modes of operation for details on how inputs can be used
(2) if using the clock as single-ended, the unused clock input must be grounded
and the minimum voltage swing for single-ended clock operation is 250mV p-p
Input Resistance 20 kΩ
Input Capacitance 1.3 pF (accessory-specific, see accessories)
Maximum Recommended State
Data Rate
1.5 Gb/s (accessory-specific, see accessories)
Minimum Data Voltage Swing 250 mV p-p
Minimum Diff. Clock Voltage
Swing
100 mV p-p each side
Input Dynamic Range -3 Vdc to +5 Vdc
Threshold Accuracy
±(30 mV +2% of setting)
Threshold Range -3.0 V to +5.0 V
Maximum Nondestructive Input
Voltage
±40 Vdc, CAT 1 (mains isolated)
Maximum Input Slew Rate 5 V/ns
Clock Input differential (2)
Number of Inputs (1) 17 (1 clock and 16 data)

10
General Information
General Characteristics
General Characteristics
The following general characteristics apply to the probe set.
Environmental Conditions
E5382A Single-ended Flying Lead Probe Set Dimensions
Operating Non-operating
Temperature 0 °C to +55 °C−40 °C to +70 °C
Humidity up to 95% relative humidity
(non-condensing) at +40 °C
up to 90% relative humidity at +65 °C
Weight approximately 0.69 kg
Dimensions Refer to the figure below.
Pollution degree 2 Normally only non-conductive pollution occurs. Occasionally, however, a
temporary conductivity caused by condensation must be expected.
Indoor use

11
General Information
To connect and set up the probe set
To connect and set up the probe set
1Connect the single-ended probe to the logic analysis module.
Two E5382As are required to support all 34 channels on one 16760A. Four
E5382As are required to support all 68 channels of one 16753/54/55/56A or
16950A.
Probe set connected to the analysis module
2Set the clock input.
aIf you are using a differential clock, select the Clock Thresh button in the
analyzer setup screen of the logic analyzer.
Differential threshold

12
General Information
To connect and set up the probe set
bIf your clock is not differential, ground the unused clock input and set the
threshold to the desired level.
User defined threshold
3Connect the flying leads to your target system.
The next section in this manual shows the recommended probe
configurations in the order of best performance. Select the configuration that
works with your target system.

2
Operating the Probe

14
Introduction
The Agilent E5382A single-ended flying lead probe set comes with
accessories that trade off flexibility, ease of use, and performance.
Discussion and comparisons between four of the most common intended
uses of the accessories are included in this section. The table on this
page is an overview of the trade-offs between the various accessories.
Each of the four configurations have been characterized for probe
loading effects, probe step response, and maximum usable state speed.
For more detailed information, refer to the pages indicated for each
configuration.
When simulating circuits that include a load model for the probe, a
simplified model of the probe's input impedance can usually be used.
The following table contains information for the simplified model of the
probe using suggested accessory configurations. For more accurate load
models and detailed discussion of each configuration's performance,
refer to the pages indicated.

15
Operating the Probe
Suggested Configurations and Characteristics
Configuration Description
Total
lumped
input C
Maximum
recommended
state speed
Details
on page
130 ΩResistive
Signal Pin (orange) and
Solder-down Ground Lead
1.3 pF 1.5 Gb/s page 16
5 cm Resistive
Signal Lead and Solder-down
Ground Lead
1.6 pF 1.5 Gb/s page 27
Flying Lead and Ground
Extender
1.4 pF 1.5 Gb/s page 39
Grabber Clip and Right-angle
Ground Lead
2.0 pF 600 Mb/s page 50

16
Operating the Probe
130 ohm Resistive Signal Pin (orange) and Solder-down Ground Lead
130 ohm Resistive Signal Pin (orange) and Solder-down
Ground Lead
This configuration is recommended for hand-held probing of individual test
points. Use the resistive signal pin for the signal. For the ground, the preferred
method is to use the solder-down ground lead. Alternatively, for ground you could
use the right-angle ground lead and a grabber clip as shown on page 50.
Hand-held probing configuration
The 130 Ωresistive signal pin and solder-down ground leads are identical to the
accessories for the Agilent 1156A/57A/58A series oscilloscope probes. They
provide similar loading effects and characteristics. The accessories for the
1156A/57A/58A probes are compatible with the E5382A probes allowing you to
interchange scope and logic analyzer leads.
Flying Lead
Solder-down
Ground Lead
130 W
Resistive
Signal Pin
(orange)

17
Operating the Probe
130 ohm Resistive Signal Pin (orange) and Solder-down Ground Lead
Input Impedance
The E5382A probes have an input impedance which varies with frequency, and
depends on which accessories are being used. The following schematic shows
the circuit model for the input impedance of the probe when using the 130 Ω
resistive signal pin (orange) and the solder-down ground wire. This model is a
simplified equivalent load of the measured input impedance seen by the target.
Equivalent load model
Measured versus modeled input impedance
2
1
8
6
10
4
4
2
1
8
6
4
2
1
8
6
4
2
10 1
MeasuredModel
10
4
68
12468 124681
Frequency
2468
12468
1246
10
9

18
Operating the Probe
130 ohm Resistive Signal Pin (orange) and Solder-down Ground Lead
Time domain transmission (TDT)
All probes have a loading effect on the circuit when they come in contact with
the circuit. Time domain transmission (TDT) measurements are useful for
understanding the probe loading effects as seen at the target receiver. The
following TDT measurements were made mid-bus on a 50 Ω transmission line
load terminated at the receiver. These measurements show how the 130 Ω
resistive signal pin (orange) and solder-down ground lead configuration affect
the step seen by the receiver for various rise times.
TDT measurement schematic
As the following graphs demonstrate, the 130 Ωresistive signal pin and solder-
down ground lead configuration is the least intrusive of the four recommended
configurations. The graphs show that the loading effects are virtually invisible
for targets with rise times ≥ 500 ps, negligible for targets with 250 ps rise times,
and usable for 100 ps rise times. Ultimately, you must determine what is an
acceptable amount of distortion of the target signal.
E5382A
Probe
Z0=50 Ω
Rterm
Driver Receiver
Rsource TDR
output
50Ω
Z0=50 Ω
50Ω
Logic
Analyzer
w/ EyeScan
TDT
input

19
Operating the Probe
130 ohm Resistive Signal Pin (orange) and Solder-down Ground Lead
TDT measurement at receiver with and without probe load for 100 ps rise time
TDT measurement at receiver with and without probe load for 250 ps rise time
50 mV per division
500 ps per division
without probe
with probe
50 mV per division
500 ps per division
without probe
with probe

20
Operating the Probe
130 ohm Resistive Signal Pin (orange) and Solder-down Ground Lead
TDT measurement at receiver with and without probe load for 500 ps rise time
TDT measurement at receiver with and without probe load for 1 ns rise time
50 mV per division
500 ps per division
without probe
with probe
50 mV per division
500 ps per division
without probe
with probe