User and Service Guide: 1145A 2-Channel Active Probe
User and Service Guide: 1145A 2-Channel Active Probe
User and Service Guide: 1145A 2-Channel Active Probe
For Safety, Regulatory, and publishing information, see the pages at the back of
this book.
Specifications 4
Characteristics 4
General Characteristics 5
Operating the Probe 6
Probe Power Connection 8
Cleaning the Probe 8
Service Strategy 8
Adjustments 11
Calibration Testing Procedures 15
2
The 1145A 2-Channel Active Probe
The 1145 2-Channel Active Probe is a 10:1 probe with a 750 MHz bandwidth.
The FET amplifier allows a high input resistance and low input capacitance which
minimizes the loading of the circuit under test. The output impedance of the
probe is 50 Ω, which allows the probe cable to be extended with a 50-Ω coaxial
cable.
The probe can be powered by the probe power outputs of the 54520 and 54540
series oscilloscopes. To use the probe with other instruments, you can use the
1142A power supply.
Accessories Supplied
Accessories Available
You can order the following accessories from Agilent Technologies.
• E.F. Johnson socket adapter, Agilent Technologies part number 01145-63201
• Calibration kit, Agilent Technologies part number 01145-68701
3
1145A 2-Channel Active Probe
Specifications
Specifications
Bandwidth 1 ≥750 MHz
Rise Time 1,2 ≤470 ps
Attenuation 3 10:1 ±3%
Input Resistance 1 MΩ, ±2%
! Maximum Input Voltage ±40 V (dc + peak ac)
1. Above 35 °C, bandwidth and risetime degrade approximately 1/2%/°C
2. Rise time figure calculated from tr = 0.35/Bandwidth.
3. When connected to an instrument input of 50 Ω, ±0.5%
Characteristics
Input Capacitance 2 pF (typical)
Overshoot and Ringing Less than ±10% for the first 6 ns, ±4% from 6 ns to
20 µs, ±1.5% thereafter.
Output Voltage Offset Error at output Less than ±1 mV
Input Dynamic Range 0 to ±6.0 V
Output Load Requirement 50Ω
4
1145A 2-Channel Active Probe
General Characteristics
General Characteristics
1145A Dimensions
5
1145A 2-Channel Active Probe
Operating the Probe
6
1145A 2-Channel Active Probe
Operating the Probe
CAUTION Be sure to limit the input of this probe to voltages within the specified working
voltage. Though the probe is designed with safeguards against static electricity
and noise, the input is sensitive to and may be damaged by excessive voltage.
7
1145A 2-Channel Active Probe
Probe Power Connection
Pin 8, -6 V
Pin 3, +6 V
Pin 7, Ground
Shell, Cable Shield
Service Strategy
If your probe fails during warranty, normal warranty service apply. If the probe
is not under warranty when it fails, you can order any of the following parts from
Agilent Technologies.
8
1145A 2-Channel Active Probe
To replace the main cable
9
1145A 2-Channel Active Probe
To return the probe to Agilent Technologies for service
10
1145A 2-Channel Active Probe
Adjustments
Adjustments
There is no defined adjustment interval for the active probe. The adjustments
are done at Agilent Technologies and does not require periodic maintenance. You
should only make adjustments when replacing the probe tip and cable assembly,
the printed circuit board assembly, or as you think is needed based on your past
experience.
The equipment required for the adjustments is listed below. Any equipment
satisfying the critical specifications listed may be substituted for the
recommended model.
Allow the probe to warm up for at least 15 minutes prior to beginning
adjustments.
Equipment Required
CAUTION The adjustments are easily damaged if you use the wrong tool or any force at
all. Make sure you use the adjustment tools that are part of the calibration kit,
Agilent Technologies part number 01145-68701.
11
1145A 2-Channel Active Probe
Adjustments
12
1145A 2-Channel Active Probe
Adjustments
2 If you installed a new board or cable assembly, set all the adjustments
(expect COMP) to the clockwise position. If you are tweaking the
adjustments, you can set them to the clockwise position or leave them
where they were last set.
3 Adjust GAIN for a flat pulse.
If you turn on the DeltaV marker, you can use it as a reference for a flat line.
4 Change the pulse generator to 50-µs period and change the scope to
5 µs/div.
5 Adjust COMP for flat pulse.
Again, you can use the DeltaV marker as a reference for a flat line.
6 Change the pulse generator to a 50-ns period and change the scope to
1 ns/div. Adjust the scope’s delay to position the pulse edge 2.5 ns from
the left hand edge of the screen.
13
1145A 2-Channel Active Probe
Adjustments
10 Temporarily place the cover on top of the probe body, then measure the
pulse rise time.
The rise time should be ≤470 ps and overshoot about 9 to 10%. You may need to
remove the cover and make minor adjustments to RA, RB, and DAMP to meet
specifications.
11 Repeat steps 1 though 10 for the other channel.
12 Install the cover, and verify the performance still meets specifications.
About 9 to 10% overshoot and a rise time ≤470 ps.
14
1145A 2-Channel Active Probe
Calibration Testing Procedures
Equipment Required
The equipment required for the calibration tests is listed at the test. Any
equipment satisfying the critical specifications listed may be substituted for the
recommended model.
CAUTION Allow the probe to warm up for at least 15 minutes prior to beginning calibration
tests. Failure to allow warm-up may cause the probe to fail tests.
15
1145A 2-Channel Active Probe
Input Resistance
Input Resistance
Specification
Equipment Required
1 Connect the DMM between the probe tip and the ground at the tip of
the probe.
2 Set up the DMM to measure resistance.
DC Gain Accuracy
Specification
Equipment Required
16
1145A 2-Channel Active Probe
DC Gain Accuracy
1 Using the DMM, set the output of the power supply to 1.0 V ±0.1%.
Power supply voltage ___________.
2 Connect the equipment as shown below.
Before you connect the power supply to the probe, you will measure the probes
output offset voltage in step 3.
17
1145A 2-Channel Active Probe
Bandwidth
Bandwidth
Specification down less than 3dB, dc to 750 MHz
Equipment Required
18
1145A 2-Channel Active Probe
Bandwidth
1 Zero and calibrate the power meters with the power sensors.
2 Connect the equipment as in the drawing below.
19
1145A 2-Channel Active Probe
Calibration Test Record
20
DECLARATION OF CONFORMITY
According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014
Product Options: This declaration covers all options of the above product(s).
Conformity/Supplementary Information:
The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC
and the EMC Directive 89/336/EEC, and carries the CE-marking accordingly (European Union).
[1]
This product was tested in a typical configuration with Agilent Technologies test systems.
For further information, please contact your local Agilent Technologies sales office, agent, or distributor.
Product Regulations
EMC IEC 61326-1:1997+A1:1998 / EN 61326-1:1997+A1:1998
CISPR 11:1990 / EN 55011:1991
IEC 61000-4-2:1995+A1:1998 / EN61000-4-2:1995 A
IEC 61000-4-3:1995 / EN 61000-4-3:1995 B
IEC 61000-4-4:1995 / EN 61000-4-4:1995 A
IEC 61000-4-5:1995 / EN 61000-4-5:1995 A
IEC 61000-4-6:1996 / EN 61000-4-6:1996 A
IEC 61000-4-11:1994 / EN 61000-4-11:1994 A
Canada: ICES-001:1998
Australia/New Zealand: AS/NZS 2064.1
Performance Codes:
A PASS - Normal operation, no effect.
B PASS - Temporary degradation, self recoverable.
C PASS - Temporary degradation, operator intervention required.
D FAIL - Not recoverable, component damage.
Notes: (none)
ICES/NMB-001
This ISM device complies with Canadian ICES-001.
Cet appareil ISM est confomre à la norme NMB-001 du Canada.
Agilent Technologies
P.O. Box 2197
1900 Garden of the Gods Road
Colorado Springs, CO 80901
Notices contained herein, includ-
ing but not limited to the
WARNING
implied warranties of A WARNING notice
© Agilent Technologies, Inc. merchantability and fit- denotes a hazard. It
2000-2003 ness for a particular pur- calls attention to an
No part of this manual may be pose. Agilent shall not be
reproduced in any form or by liable for errors or for operating procedure,
any means (including elec- incidental or consequen- practice, or the like
tronic storage and retrieval or tial damages in connec- that, if not correctly
translation into a foreign lan- performed or adhered
guage) without prior agree- tion with the furnishing,
ment and written consent use, or performance of to, could result in
from Agilent Technologies, this document or of any personal injury or
Inc. as governed by United information contained death. Do not proceed
States and international copy- herein. Should Agilent
right laws. and the user have a sepa-
beyond a WARNING
rate written agreement notice until the
Manual Part Number
with warranty terms cov- indicated conditions
01145-92003, July 2003 are fully understood
ering the material in this
Print History document that conflict and met.
01145-92002, August 2002 with these terms, the war-
01145-92001, June 2000 ranty terms in the sepa-
Agilent Technologies, Inc. rate agreement shall
1900 Garden of the Gods Road control.
CAUTION
Colorado Springs, CO 80907
USA Technology Licenses A CAUTION notice
The hardware and/or soft- denotes a hazard. It
Restricted Rights Legend ware described in this docu-
ment are furnished under a calls attention to an
If software is for use in the
performance of a U.S. Govern- license and may be used or operating procedure,
ment prime contract or sub- copied only in accordance practice, or the like
contract, Software is with the terms of such license. that, if not correctly
delivered and licensed as performed or adhered
“Commercial computer soft-
ware” as defined in DFAR to, could result in
252.227-7014 (June 1995), or as damage to the product
a “commercial item” as or loss of important
defined in FAR 2.101(a) or as
“Restricted computer soft- data. Do not proceed
ware” as defined in FAR beyond a CAUTION
52.227-19 (June 1987) or any notice until the
equivalent agency regulation indicated conditions
or contract clause. Use, dupli-
cation or disclosure of Soft- are fully understood
ware is subject to Agilent and met.
Technologies’ standard com-
mercial license terms, and
non-DOD Departments and
Agencies of the U.S. Govern-
ment will receive no greater
than Restricted Rights as
defined in FAR 52.227-19(c)(1-
2) (June 1987). U.S. Govern-
ment users will receive no
greater than Limited Rights as
defined in FAR 52.227-14 (June
1987) or DFAR 252.227-7015
(b)(2) (November 1995), as
applicable in any technical
data.
Document Warranty
The material contained in
this document is provided
“as is,” and is subject to
being changed, without
notice, in future editions.
Further, to the maximum
extent permitted by appli-
cable law, Agilent dis-
claims all warranties,
either express or implied,
01145-92003
with regard to this man- Printed in Malaysia
ual and any information