AC Probes Datasheet T_CT1 T CT1

TEK_CT2 TEK_CT2

User Manual: T_CT1

Open the PDF directly: View PDF PDF.
Page Count: 4

AC Current Probes
CT1 • CT2 • CT6 Datasheet
CT6. Current Probe
Features & Benefits
High Bandwidth
Ultra-low Inductance
Very Small Form Factor
Characterize Current Waveforms up to <200 ps Rise Times
Very Low Loading of Circuit Under Test
Fits Into Dense, Closely-spaced Circuit Designs
Applications
Data Storage Read Channel Design
Silicon Characterization
High-frequency Analog Design
ESD Testing
Signal Injection
Differential Current Measurements
Single-shot Low Rep-rate Pulse Measurements
Propagation Delay Measurement
CT6 Current Probe
The CT6 is the newest addition to the Tektronix portfolio of high-frequency
current probes. It is designed to meet the needs of high-speed circuit
design and test applications which require ultra-high bandwidth, low
inductance, and extremely small form factor. The CT6 provides up to
2 GHz bandwidth when used with high-bandwidth oscilloscopes such as
the Tektronix TDS694C, TDS794D, and TDS7000 Series oscilloscopes or
with other compatible 50 Ωinput measuring instruments. Low inductance
(<3 nH) assures that the loading effect of the CT6 on the circuit-under-test
will be negligible, which is especially important for today's low-amplitude,
high-speed circuit designs such as disk drive read/write preamplifiers. The
probe is a closed-circuit design which will accept uninsulated wire sized
up to 20 gauge. This product is exempt from CE mark by virtue of its 30 V
voltage limit.
CT1/CT2 Current Probes
The CT1 and CT2 Current Probes are designed for permanent or
semi-permanent in-circuit installation. Each probe consists of a current
transformer and an interconnecting cable. The current transformers have
a small hole through which a current carrying conductor is passed during
circuit assembly.
The P6041 Probe Cable provides the connection between the CT1 and CT2
Current Transformers and a BNC oscilloscope input. A 50 Ωtermination
is required to terminate the cable when connected to a high-impedance
(1 MΩ) oscilloscope input. One probe cable can be used to monitor several
current transformers that have been wired into a circuit.
Datasheet
CT1/CT2. Current Probes with P6041 BNC Probe Cable.
Miniature Construction
The CT1 and CT2 detachable cable design enables one or more probes to
be located on circuit boards or in other limited space areas.
The CT6 offers the smallest form factor available, for measurement on
ever-shrinking circuit boards and components. It is designed for temporary
installation and does not incorporate removable cables, as the CT1 and
CT2 do.
Extendible Probe Length
Specified rise time and bandwidth are obtained when using the probe
cables provided: The P6041 cable used with the CT1 and CT2 is 42 inches
nominal. If additional length is required, the cables can be extended by
using high-quality 50 Ωcable and suitable interface connectors. (Also see
Special Probe Cables, Optional Accessories.) Long cables may degrade
high-frequency response.
High Sensitivity
The CT1 and CT6 provide an output of 5 mV for each milliamp of input
current when terminated in 50 Ω. The CT2 provides 1 mV per milliamp when
terminated in 50 Ω.
Typical Systems
The CT1, CT2, and CT6 high-frequency current transformers are dynamic
(i.e., non-DC) current measuring devices. They are typically used in
conjunction with compatible high-bandwidth oscilloscopes and other
instruments to observe and/or record high-frequency current waveforms.
The CT1, CT2, and CT6 normally operate directly into 50 Ωscopes and
other measuring device inputs.
The CT1 or CT2 canbeusedwith1MΩinput systems; use the P6041
probe cable and terminate the output with a 50 Ωfeed-through termination
(see Optional Accessories).
In all cases, the CT1, CT2, and CT6 must work into 50 Ωs to obtain
specified performance and sensitivity.
Typical Measurement Applications
Differential Current Measurements
Most true-differential voltage amplifiers have a maximum bandwidth
of about 100 MHz. The CT1 or CT6 can make differential current
measurements to 1 GHz and 2 GHz, respectively, by passing two wires
carrying opposing currents through the same core. The displayed result is
the difference current. The CT2 can perform the same function to 200 MHz.
In all cases, Derating with Frequency and Amp-second Product
(Current-time Product) guidelines should not be exceeded. (See
Characteristics.)
Single-shot and Low Rep-rate Pulse Measurements
These common measurements are easy to make with the CT1, CT2, or CT6
provided that your signal fits within the Max Pulse Current and Amp-second
Product (Current-time Product) guidelines for the specific current probe
characteristics.
For example, the CT2 is rated at 36 A peak, with an Amp-second Product
of 50 × 10-6 seconds (50 Amp-microseconds), therefore the CT2 can safely
handle a 36 A peak pulse with a maximum width of 1.39 microseconds or
lower amplitude pulses for longer pulse widths. The CT1, CT2, and CT6
all have low-frequency roll-off characteristics. Low-frequency "droop" will
exhibit itself when the pulse width approaches the L/R time constant of the
specific transformer.
Propagation Delay Measurements
Two CT1 or CT2 Current Transformers with matching probe cables can
be used to measure propagation delay (transit time) between the input
and output currents of high-frequency devices. The probe outputs are
connected to the inputs of dual-channel real-time or sampling scopes.
Verification of any Probe/Cable/Scope System mismatch can be obtained
by passing the same signal current through both probes and observing total
system delay difference, if any.
2www.tektronix.com
AC Current Probes — CT1 • CT2 • CT6
CT1 Typical Frequency Response.
CT2 Typical Frequency Response.
CT6 Typical Frequency Response.
Characteristics
CT1, CT2, and CT6 Characteristics
Characteristic CT1 CT2 CT6
Bandwidth (typical) 25 kHz to 1 GHz 1.2 kHz to 200 MHz 250kHzto2GHz
Rise Time 350 ps 500 ps 200 ps
Sensitivity
(into 50 Ω)
5mV/mA 1mV/mA 5mV/mA
Accuracy ±3% ±3% ±3%
Magnetizing
Inductance
6μH7μH1μH
Leakage
Inductance
2.4 nH 1 nH 1.5 nH
Insertion Impedance:
at 10 MHz <1 Ω0.1 Ω1.1 Ω
at 100 MHz 2Ω0.5 Ω1.3 Ω
at 1 GHz 11.9 Ω
#14 wire #16 wire #20 wire
Max. Bare Wire
Size 1.78 mm (0.070 in.) 1.32 mm (0.052 in.) 0.8 mm (0.032 in.)
Max. Bare Wire Voltage:
RMS 175 VRMS CAT I 175 VRMS CAT I 30 VRMS CAT I
Peak 1000 V*11000 V*130 V
DC 175 V 175 V 30 V
Max. Peak Pulse
Current
12 A 36 A 6 A
Max. Continuous
Current (RMS)
450 mA 2.5 A 120 mA
Amp-second
Product
1×10
-6 A*Sec 50 × 10-6 A*Sec 0.25 × 10-6 A*Sec
L/R Time Constant
(droop)
>6.35 μs>160μs0.4μs
Propagation Delay 5.4 ns 6.1 ns 5.2 ns
Safety UL3111-2-032,
CSA1010.2.032,
EN61010-2-032,
IEC61010-2-032
UL3111-2-032,
CSA1010.2.032,
EN61010-2-032,
IEC61010-2-032
NA
*1(<3.25% Duty Factor).
www.tektronix.com 3
Datasheet Contact Tektronix:
ASEAN / Australasia (65) 6356 3900
Austria 00800 2255 4835*
Balkans, Israel, South Africa and other ISE Countries +41 52 675 3777
Belgium 00800 2255 4835*
Brazil +55(11)37597627
Canada 1 800 833 9200
Central East Europe and the Baltics +41526753777
Central Europe & Greece +41 52 675 3777
Denmark +4580881401
Finland +41526
75 3777
France 00800 2255 4835*
Germany 00800 2255 4835*
Hong Kong 400 820 5835
India 000 800 650 1835
Italy 00800 2255 4835*
Japan 81 (3) 6714 3010
Luxembourg +41526753777
Mexico, Central/South America & Caribbean 52 (55) 56 04 50 90
Middle East, Asia, and North Africa +41 52 675 3777
The Netherlands 00800 2255 4835*
Norway 800 16098
People’s Republic of China 400 820 5835
Poland +41 52 675 3777
Portugal 80 08 12370
Republic of Korea 001 800 8255 2835
Russia & CIS +7 (495) 7484900
South Africa +41526753777
Spain 00800 2255 4835*
Sweden 00800 2255 4835*
Switzerland 00800 2255 4835*
Taiwan 886 (2) 2722 9622
United Kingdom & Ireland 00800 2255 4835*
USA 1 800 833 9200
* European toll-free number. If not accessible, call: +41 52 675 3777
Updated 10 February 2011
For Further Information. Tektronix maintains a comprehensive, constantly expanding
collection of application notes, technical briefs and other resources to help engineers working
on the cutting edge of technology. Please visit www.tektronix.com
Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents,
issued and pending. Information in this publication supersedes that in all previously published material.
Specification and price change privileges reserved. TEKTRONIX and TEK are registered trademarks of
Tektroni x, Inc. All other trade names referenced are the service marks, trademarks, or registered trademarks
of their respective companies.
06 Dec 2013 60W-12572-4
Ordering Information
CT1
High-frequency Current Probe.
Includes: Manual and P6041 Interconnect Cable.
CT2
High-frequency Current Probe.
Includes: Manual and P6041 Interconnect Cable.
CT6
High-frequency Current Probe.
Service
Opt. C3 – Calibration Service 3 Years
Opt. C5 – Calibration Service 5 Years
Opt. D1 – Calibration Data Report (CT6 only)
Opt. D3 – Calibration Data Report 3 Years (with Opt. C3)
Opt. D5 – Calibration Data Report 5 Years (with Opt. C5)
Opt. R3 – Repair Service 3 Years
Opt. R5 – Repair Service 5 Years
Opt. SILV400 – Standard Warranty Extended to 5 Years (CT6 Only).
CT1 or CT2 Recommended Accessories
Feed-through 50 ΩTermination – Order 011-0049-02.
CT6 Standard Accessories
SMA to BNC Adapter – Order 015-0572-xx.
User Manual – Order 071-0453-xx.
Color Cable Marker Bands –
Probe Holder – Order 015-0682-xx.
Certificate of Traceable Calibration –
Warranty – One Year.
Tektronix is registered to ISO 9001 and ISO 14001 by SRI Quality System Registrar.
www.tektronix.com

Navigation menu