Tektronix 679-5027-00 Primary User

679-5027-00
IEEE1394 Adapter
Instructions

071-0631-00

Product Description

The IEEE1394 serial bus is an interconnect
standard running up to 400 Mb/s, used for
computer peripherals, such as digital cameras and
disk drives.

The IEEE1394 Adapter allows you to probe
signals on the bus, external to system enclosures,
without disturbing system operation. The adapter
maintains a balanced 55 ohm signal path, is
hot-pluggable, and can be used in both
single-ended and differential modes.

Using the Adapter

To use the IEEE1394 Adapter, do the following:

1. Disconnect the firewire cable from the point
you intend to probe. The system does not
need to be powered off.

2. Plug the IEEE1394 Adapter into the
connection you removed the cable from.

3. Plug the cable into the adapter.

4. Connect your probe to the appropriate signal
pins. See Figure 1.

5. J4 is used for a current loop connection; this
connector typically has a shorting jumper
attached.

NOTE. To reduce signal reflections, you can

clip off the pins of the unused test points. For
example, if you are only making differential
measurements, clip off the two single-ended
test points.
(This will make the adapter usable for
differential measurements only; you will
need to use another adapter for single-ended
measurements.)

Adapter test points

Table 1 lists the signals available on the adapter.

Table 1: Test points

Signal
Name

TPA A Transmit signal/receive data
TPA* A*
TPB B Transmit data/receive signal
TPB* B*
VP VP Power
VG VG Power ground
GND GND Pair shield

Abbrevi­ation

Description

*P071063100*

071063100

J2
1
2

3
4
5
6

Jumper

VPVPVG

J9

J5

G

+
–

B*

J3

G

+
–

A*

B

+
–

B*

J6

A

+
–

A*

VP
J4

J7

B

+
–

G

J8

A

+
–

G

1
2
3
4
5
6

7
8
9

Schematic diagram

Board layout

Figure 1: IEEE1394 Adapter

Safety Summary

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

To avoid fire or personal injury

Connect and disconnect properly. Connect the probe

output to the measurement instrument before
connecting the probe to the circuit under test.
Disconnect the probe input and probe ground
from the circuit under test before disconnecting
the probe from the measurement instrument.

Observe all terminal ratings. To avoid fire or shock

hazard, observe all ratings and markings on the
product. Consult the product manual for further
ratings information before making connections to
the product.

Do not operate with suspected failures. If you

suspect there is damage to this product, have it
inspected by qualified service personnel.

Do not operate in wet/damp conditions.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.

Safety terms on the product

DANGER indicates an injury hazard immediately
accessible as you read the marking.

WARNING indicates an injury hazard not
immediately accessible as you read the marking.

CAUTION indicates a hazard to property
including the product.

Safety symbols on the product

Protective Ground

(Earth) Terminal

CAUTION

Refer to Manual

WARRANTY SUMMARY

Tektronix warrants that the products that it
manufactures and sells will be free from defects in
materials and workmanship for a period of three
(3) months from the date of shipment from an
authorized Tektronix distributor. If a product or
CRT proves defective within the respective period,
Tektronix will provide repair or replacement as
described in the complete warranty statement.

To arrange for service or obtain a copy of the
complete warranty statement, please contact your
nearest Tektronix sales and service office.

EXCEPT AS PROVIDED IN THIS SUMMARY
OR THE APPLICABLE WARRANTY
STATEMENT, TEKTRONIX MAKES NO
WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING WITHOUT
LIMITATION THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. IN NO EVENT
SHALL TEKTRONIX BE LIABLE FOR
INDIRECT, SPECIAL OR CONSEQUENTIAL
DAMAGES.

Copyright  Tektronix, Inc.
Wilsonville, OR 97070-1000