Tektronix Logic Probe Deskew Fixture User manual

067-2298-00
Logic Probe
Deskew Fixtur

ZZZ

Instructions

For best results
up for 20 minutes, and then perform SPC (signal
path compensati
deskew procedure.

Fixture Preparation

You must solder the TriMode solder tip to the

e

fixture before performing the deskew procedure.
The following equipment is required:

ESD-approved soldering iron and tweezers

Wire, no-clean flux solder, and instructions
(included with P75TLRST solder tips)

Cable tie or tape

M

1. Connect the TriMode solder tip. Refer to the
figure below and the soldering instructions
included with the solder tip.

, allow the oscilloscope to warm

on) before performing the

agnifying lens

2. Connect the prob
on the fixture.

3. Connect the logic probe to the oscilloscope,
andthentothefixture. Note the following:

You must connect single-ended probes with
the signal side of the probe toward the short
edge of the board as shown. (See Figure 3.)

Figure 3: Single-ended p ro be connections

e to the TriMode solder tip

*P071285000*

071-2850-00

Deskew Fixture

This fixture provides an edge source to time-align
trigger signals from the logic probe tips. It allows
you to deskew a logic probe and one analog
probe on the MSO70000 series oscilloscopes,
resultinginimprovedreliabilityandaccuracy.

Figure 1: Deskew fixture with TriMode solder tip
attached

The fixture supports P6717, P6717A, P6750
and P6780 oscilloscope logic probes and P7500
Series TriMode probes, and is powered by one of
the USB ports of the oscilloscope. A USB cable
is included with the fixture.

A P7500 Series TriMode solder tip is also
required for the alignment procedure, but is not
included with the fixture.

Equipment Required

Deskew fixture and USB cable

One Logic Probe (P6717, P6717A , P6750
or P6780)

One analog P7500 Series TriMode Probe

One TriMode probe differential solder
tip (tips with ground connections are
recommended—the P75TLRST, for
example)

Figure 2: P75TLRST solder tip connections

2. Check the Calibration Status of the Analog
Probe: Select Probe Cal... from the Vertical
menu. The Probe Setup screen appears.

On the left side of the Probe Setup screen,
click the channel tab that corresponds to the
channel that the analog probe is attached to,
and then check the Probe Status readout:

Initialized. The probe has not been
calibrated on the selected channel; perform
the DC probe calibration procedure. Refer
to the probe manual or oscilloscope online
help for instructions.

Pass. The probe has been calibrated on
the selected channel. Perform the deskew
procedure.

Fail. The probe has not been calibrated or
has failed; repeat the calibration procedure.
If the test fails, troubleshoot the problem;
do not proceed to the deskew procedure.

Deskew Procedure

1. Connect a P7500 Series TriMode probe to
any channel (1–4) of the oscilloscope. Set
the probe to A-B (differential).

Connect differential probes with the (+) side
toward the short edge of the board. (See
Figure 4.)

Figure 4: Differential probe connections

Connect P6750 logic probes to the
color-keyed connector. Align the silver
screw to the silver side. (See Figure 5.)

Figure 5: P6750 Probe connection

Probe connectio

n notes:

All 16 channels must be connected (in

any sequence).

Use the probe grouper or holder

accessory to simplify connecting to the
board.

Leave the CLK channel disconnected

(unnecessary for the P6750 probe).

4. Plug the USB cable into the fixture and
into a USB port on the oscilloscope. The
USB port only supplies board power; no
communication occurs through the port.

5. Select Vertical | Probe Cal, and then select
"D15-D0" on the left.

6. Select the proper Reference Channel from
the drop down menu in the Trigger Path
Alignment area of the Probe Setup menu.

7. ClicktheAlignTriggerPathbuttononthe
Probe Setup screen to start the alignment.

8. Observe the Probe Status field for results
(Pass or Fail).

Probe Setup Screen Description

Trigger Path Alignment ? button. Click this

button to display additional information about
the alignment paths used in the procedure.

Probe Status field.

Initialized = ready for alignment

Pass = probes are aligned and ready to use

Fail = alignment failed; check connections
and retry

Reference Channel drop-down menu. From this
menu, select the oscilloscope channel that your
analog reference probe is attached to.

Probe Propertie

s Screen Description

Probe drop-down menu. From this drop-down

menu, you can sel

ect the analog or logic probes

that are connected to the oscilloscope.

Probe Type and Serial Number fields. These
fields identify

the probes that are connected to
the digital channels and the reference channel of
the oscillosco

pe. N/A indicates an alignment has

not been run.

Reference Channel, Type, and Serial Number

fields. These fi

elds display the properties of the

analog reference probe used for the procedure.

Analog to Digital Trigger Path Alignment

field. This fiel

d s hows the relationship of the
alignment between the digital and analog trigger
paths:

(+) = analog path is first

(–) = digital path is first

N/A indicates a n alignment has not been run.

Restoration of Probe Constants

When you reconnect a probe to both the
oscilloscope channel and to the same deskew
fixture channels that the probe was previously
calibrated on, the oscilloscope recognizes
the probe, recalls the alignment data for that
probe/channel combination, and displays a
dialog indicating that the stored alignment data
is current. Another alignment procedure is not
required for this probe/channel combination.

Safety Summary

To avoid potential hazards, use this product only
as specified.

To avoid fire or personal injury, do not operate
in wet/damp conditions.

Keep product surfaces clean and dry.

Environmental Considerations

Equipment Recycling. This
product complies with the
European Union’s requirements
according to D
on waste electrical and electronic
equipment (WEEE). For more
information about recycling
options, check the Support/Service
section of the Tektronix Web site
(www.tektron

irective 2002/96/EC

ix.com).

Warranty Information

For warranty information, go to
www.tektronix.com\service, and then use
the provided links to search for your product's
warranty.

Contacting

Tektronix

Tektronix, Inc.
14200 SW Kar

lBraunDrive
PO Box 500
Beaverton,

OR 97077

USA

For product information, sales, service, and
technical support:

In North America, call 1-800-833-9200.

Worldwide, visit www.tektronix.com to find
contacts i

n your area.

Clear Trigger Path Alignment button. Click this
button to clear the oscilloscope memory of
previously-aligned probe data.

Align Trigger Path button. Click this button to
start the calibration routine for the probe.

Probe Setup and Probe Properties screens

opyright © Tektronix, Inc. All rights reserved. www.tektronix.com

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