xx
TPS2000B Series
ZZZ
Digital Storage Oscilloscopes
Service Manual
*P077044701*
077-0447-01
xx
TPS2000B Series
ZZZ
Digital Storage Oscilloscopes
Service Manual
This document supports firmware version 1.00 and above.
Warning
The servicing instructions are for use by qualified personnel
only. To avoid personal injury, do not perform any servicing
unless you are qualified to do so. Refer to all safety summaries
prior to performing service.
Revision A
www.tektronix.com
077-0447-01
Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries
or suppliers, and are protected by national copyright laws and international treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication
supersedes that in all previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14150 SW Karl Braun Drive
P.O . Bo x 50 0
Beaverto
USA
For product information, sales, service, and technical support:
n, OR 97077
In North America, call 1-800-833-9200.
World wide , vi sit www.tektronix.com to find contacts in your area.
Table of Contents
General Safety Summary .......................................................................................... v
Service Safety Summary...................................... .................................. ................. vii
Preface .............................................................................................................. ix
Products.................. .................................. ................................ .................... ix
Related Manuals .... .................................. ................................ ........................ ix
Probe Safety. ................................ .................................. ................................ . x
Specifications ............................ ................................ .................................. ......... 1
Signal Acquisition System. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. ... .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . 1
Time Base System .......................... ................................ ................................ ... 3
Triggering System .................. ................................ .................................. ......... 4
Display............... ................................ ................................ ........................... 7
Batteries.......................... ................................ .................................. ............. 7
External DC Input ............................................................................................. 8
External Interfaces ............................................................................................. 8
Mechanical Characteristics ................................................................................... 9
Environmental Performance.................................................................................. 9
Operating Information ............................................................................................ 11
Theory of Operation. ................................ ................................ .............................. 13
Acquisition Board .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. ... . 14
Power Supply and Battery System.......................................................................... 16
Display Module ..... ................................ .................................. ........................ 16
Front Panel .... ................................ ................................ ................................ 16
Performance Verification ............... ................................ .................................. ........ 19
Required Equipment.. .................................. ................................ ...................... 19
Test Record ...... .................................. ................................ ............................ 20
Self Test ................................................................................................... 23
Self Calibration....... .................................. ................................ .................. 23
Check DC Gain Accuracy............................................................................... 24
Check DC Measurement Accuracy .................. .................................. ................ 25
Check Bandwidth .................... ................................ .................................. .. 27
Check Sample Rate and Delay Time Accuracy....................... ................................ 28
Check Edge Trigger Sensitivity ... .. . .. .. . .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . . 29
Check External Edge Trigger Sensitivity.. .. . .. ... .. . .. .. . .. .. . .. . .. .. . .. ... .. . .. .. . .. .. . .. . .. .. . .. .. . 30
Adjustment Procedures ........................................................................................... 33
Required Equipment.. .................................. ................................ ...................... 33
Adjustment Procedure........................................................................................ 34
Maintenance........................................................................................................ 41
Preparation........... ................................ .................................. ........................ 41
Preventing ESD............................................................................................... 41
TPS2000B Series Digital Storage Oscilloscopes Service Manual i
Table of Contents
Inspection and
Removal and Installation Procedures................................... ................................ .... 45
Rear Case ................................................................................................. 47
Fan................................. ................................ .................................. ...... 49
I/O Board ................................................................................................. 50
Acquisition Board. . .. .. . .. . . . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . . . .. . .. .. . .. .. . 51
Display Ada
Front-Panel Knob ........................................................................................ 54
Front Case ................................................................................................ 54
Front-Panel Board ....................................................................................... 56
Display Module .......................................................................................... 57
Compact Flash Board.................................................................................... 58
Keypad ...... ................................ .................................. ............................ 5
Troubleshooting......... ................................ ................................ ...................... 60
Troubleshooting Tree.................................................................................... 61
Lithium-Ion Battery Maintenance .......................................................................... 66
Repackaging Instructions .... ................................ .................................. .............. 69
Diagrams ........................................................................................................... 71
aceable Parts.. ................................ .................................. .............................. 73
Repl
Parts Ordering Information .......... ................................ .................................. ...... 73
Using the Replaceable Parts List............................................................................ 74
Cleaning.... ................................ .................................. ................ 42
pter Board .................................................................................. 52
8
ii TPS2000B Series Digital Storage Oscilloscopes Service Manual
List of Figures
Figure 1: TPS2000B Series module-level block diagram. Remove CH3 and CH4 for a 2-channel
version . ................................ ................................ .................................. ...... 13
Figure 2: Adjustment setups ................... .................................. ................................ 35
Figure 3: Re
Figure 4: Modules accessed from the rear of the oscilloscope . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. ... .. . .. .. . .. ... 50
Figure 5: Using a screwdriver to remove the Acquisition board .. .. . .. .. . .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . . 52
Figure 6: Removing the BNC cover, shell, and retaining nuts ............................................... 54
Figure 7: Removing the front case .............................................................................. 55
Figure 8: Removing the Front-Panel module................................. ................................ .. 56
Figure 9
Figure 10: Removing and installing the keypad . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. 59
Figure 11: Oscilloscope troubleshooting tree (page 1 of 4). .. . .. . .. .. . .. . .. . .. .. . .. . .. . .. .. . .. . .. .. . .. . .. ... . 61
Figure 12: Oscilloscope troubleshooting tree (page 2 of 4). .. .. . .. . .. .. . .. . .. ... .. . .. ... .. . .. ... .. . .. ... .. . .. 62
Figure 13: Oscilloscope troubleshooting tree (page 3 of 4). .. .. . .. . .. .. . .. . .. ... .. . .. ... .. . .. ... .. . .. ... .. . .. 63
Figure 14: Oscilloscope troubleshooting tree (page 4 of 4). .. .. . .. . .. .. . .. . .. ... .. . .. ... .. . .. ... .. . .. ... .. . .. 64
re 15: TPS2000B Series block diagram ................................................................... 71
Figu
Figure 16: Exploded view diagram.............................................................................. 78
moving and installing the rear case . . .. . .. .. . .. ... .. . .. .. . .. .. . .. . .. .. . .. ... .. . .. .. . .. .. . .. . .. .. . . 48
: Removing the Display module ....................................................................... 57
TPS2000B Series Digital Storage Oscilloscopes Service Manual iii
Table of Contents
List of Tables
Table 1: Signal acquisition system . . .. .. . .. ... .. . .. .. . .. .. . .. . .. .. . .. ... .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. 1
Table 2 : Tim
Table 3: Triggering system ............................. ................................ ........................... 4
Table 4: Display .................................................................................................... 7
Table 5: Batteries .............................. ................................ ................................ ..... 7
Table 6: External DC input......................... ................................ ............................... 8
Table 7: External interfaces ....................................................................................... 8
Table 8 : M
Table 9: Environmental performance ............................................................................ 9
Table 10: Required equipment ................................................................................... 19
Table 11: Test record.......... .................................. ................................ .................. 20
Table 12: Required equipment ................................................................................... 33
Table 13: Adjustments (steps 73-108 are for 4-CH models only).............................. .............. 37
14: Internal inspection checklist.......................................................................... 43
Table
Table 15: List of error codes ..................................................................................... 65
Table 16: Parts list column descriptions .................. ................................ ...................... 74
Table 17: Replaceable parts list.................................................................................. 75
e base system ............. ................................ .................................. ......... 3
echanical characteristics ........... .................................. ................................ . 9
iv TPS2000B Series Digital Storage Oscilloscopes Service Manual
General Safety Summary
General Safet
To Avoid Fire or Personal
Injury
ySummary
Review the fo
this product or any products connected to it.
To avoid pot
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of a larger system.
Read the safety sections of the other component manuals for warnings and
cautions r
Use proper power cord. Use only the power cord specified for this product and
certified for the country of use.
Connect and disconnect properly. Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
Connect and disconnect properly. Connect the probe output to the measurement
instrument before connecting the probe to the circuit under test. Connect the
probe r eference lead to the circuit under test before connecting the probe input.
Disconnect the probe input and the probe reference lead from the circuit under test
before disconnecting the probe from the measurement instrument.
llowing safety precautions to avoid injury and prevent damage to
ential hazards, use this product only as specified.
elated to operating the system.
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
ormation before making connections to the product.
inf
Do not apply a potential to any terminal, including the common terminal, that
ceeds the maximum rating of that terminal.
ex
Do not operate without covers. Do not operate this product with covers or panels
moved.
re
Do not operate with suspected failures. If you suspect that there is damage to this
roduct, have it inspected by qualified service personnel.
p
Avoid exposed circuitry. Do not touch exposed connections and components when
power is present.
Replace batteries properly. Replace batteries only with the specified type and
rating.
Recharge batteries properly. Recharge batteries for the recommended charge cycle
only.
Use proper AC adapter. Use only the AC adapter specified for this product.
Wear eye protection. Wear eye protection if exposure to high-intensity rays or
laser radiation exists.
TPS2000B Series Digital Storage Oscilloscopes Service Manual v
General Safety Summary
TermsinThisManual
Symbols and Terms on the
Product
Do not operate i
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.
Provide prop
on installing the product so it has proper ventilation.
These terms may appear in this manual:
WARNING.
in injury or loss of life.
CAUTION
damage to this product or other property.
These t
erms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read
the ma
n wet/damp conditions.
er ventilation. Refer to the manual's installation instructions for details
Warning statements identify conditions or practices that could result
. Caution statements identify conditions or practices that could result in
rking.
WARNING indicates an injury hazard not immediately accessible as you
the marking.
read
CAUTION indicates a hazard to property including the product.
The following symbol(s) may appear on the product:
vi TPS2000B Series Digital Storage Oscilloscopes Service Manual
Service Safety Summary
Service Safet
y Summary
Only qualifie
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.
UseCareWhenServicingWithPowerOn. Dangerousvoltagesorcurrentsmay
exist in
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.
d personnel should perform service procedures. Read this Service
this product. Disconnect power, remove battery (if applicable), and
TPS2000B Series Digital Storage Oscilloscopes Service Manual vii
Service Safety Summary
viii TPS2000B Series Digital Storage Oscilloscopes Service Manual
Preface
Products
This service manual for the TPS2000B Series Digital Storage Oscilloscopes
provides instructions to verify the performance of, calibrate, troubleshoot, and
repair the os
cilloscopes to the module level.
Unless noted otherwise, the term "oscilloscope" refers to all of the models in
the TPS2000
BSeries.
Related Manuals
This manu
al covers the following products:
TPS2012B Digital Storage Oscilloscope
TPS2014B Digital Storage Oscilloscope
TPS2024B Digital Storage Oscilloscope
These manuals contain additional documentation for the oscilloscopes. They are
available at www.tektronix.com/manuals.
ammer manual part
Progr
Language User manual part number
ish
Engl
French 071-2734-XX
Italian 071-2735-XX
German
Spanish
panese
Ja
Portuguese 071-2739-XX
Simplified Chinese
Traditional Chinese
Korean 071-1450-XX
Russian 071-2743-XX
1
These manuals contain a language overlay for the front-panel controls.
2733-XX
071-
-2736-XX
071
-2737-XX
071
1-2738-XX
07
071-2740-XX
071-2741-XX
1
1
1
1
1
1
1
1
1
1
number
0444-XX
077-
TPS2000B Series Digital Storage Oscilloscopes Service Manual ix
Preface
Probe Safety
A guard around the probe body provides a finger barrier for protection from
electric shock.
WARNING. To avoid electric shock when using the probe, keep fingers behind the
guard on the probe body, and do not touch metallic portions of the probe head
while it i
Connect the probe output to the oscilloscope before connecting the probe to
the cir
from the circuit under test before disconnecting the probe from the measurement
instrument.
s connected to a voltage source.
cuit under test. Disconnect the probe input and the probe reference lead
x TPS2000B Series Digital Storage Oscilloscopes Service Manual
Specifications
ignal Acquisition System
S
Table 1: Signal acquisition system
These specifications apply to all TPS2000B Series oscilloscopes. To verify that an
oscilloscope meets specifications, it must first meet the following conditions:
The oscilloscope must have been operating continuously for twenty minutes
within the specified operating temperature range. (See Table 9.)
You must perform the Do Self Cal operation, accessible through the Utility
menu, if the operating temperature changes by more than 5 °C.
The oscilloscope must be within the factory calibration interval of one year.
The V/div specifications apply with the probe calibration set to 1X probe
mode.
Specifications begin in the following table. All specifications are guaranteed
unless noted "typical." Specifications that are marked with the
symbol are
checked in the Performance Verification section.
Characteristic Description
Number of Input Channels Two (TPS2012B) or four (TPS2014B, TPS2024B) identical channels, digitized simultaneously
Input Coupling DC, AC, or GND
AC coupling connects a capacitor in series with the input circuitry. The DC input impedance
becomes very high, since capacitance is in series with all paths to ground.
Ground coupling mode provides a reference waveform derived from the values identified during
SPC. This reference waveform shows visually where signal reference (ground) is expected
to be.
Input Impedance, DC Coupled 1 MΩ ±2%inparallelwith20pF±3pF
Maximum Input Voltage (between
Signal and Reference at input
1
BNC)
Maximum Float Voltage
Number of Digitized Bits 8-bit resolution (except when set to 2 m V/div), each channel sampled simultaneously.
Overvoltage Category
CAT I and CAT II
CAT III
At front panel connector, 300 V
AC at 3 MHz and above.
All inputs are rated 300 V CAT II, signal to floating common.
Derate at 20 dB/decade above 100 kHz to 13 V peak AC at 3 MHz and above. For
nonsinusoidal waveforms, peak value must be less than 450 V. Excursion above 300 V should
be less than 100 ms duration. RMS signal level, including any DC component removed through
AC coupling, must be limited to 300 V. If these values are exceeded, damage to the oscilloscope
may result. Refer to the Overvoltage Category description. (See Table 9 on page 9.)
Rated 600 V
Between instrument common (chassis) and BNC shell. Using rated connectors or accessories.
RMS
CAT II.
RMS
Maximum Voltage
300 V
RMS
150 V
RMS
; derate at 20 dB/decade above 100 kHz to 13 V peak
TPS2000B Series Digital Storage Oscilloscopes Service Manual 1
Specifications
Table 1: Signal acquisition system (cont.)
Characteristic Description
Supported Voltage Probe
Attenuation Factors
Supported Current Probe Scales 1 mV/mA, 5 mV/mA, 1 mV/A, 10 mV/A, 20 mV/A, 50 mV/A, 100 mV/A, 200 mV/A
Acquisition Modes
DC Gain Accuracy
DC Measurement Accuracy,
ge Acquisition Mode
Avera
DC Voltage Measurement
Repeatability, Average Acquisition
Mode
Analog Bandwidth
Analog Bandwidth in Sample
and Average modes at BNC or with
probe set to 10X, DC Coupled,
typical
Analog Bandwidth in Peak Detect
mode (50 s/div to 5 ms/div), DC
coupled, typical
Lower Frequency Limit, AC
Coupled
1X, 10X, 20X, 50X, 100X, 500X, 1000X
This adjusts the display scale factor of the instrument to accommodate v arious probe types.
Accuracy of the probe used must be added to the accuracy specifications of instrument.
The Tektronix probe Interface is not provided, so the user m ust adjust the setting to match
the probe characteristics.
This adjusts the display scale factor of the instrument to accommodate v arious probe types.
Accuracy of the probe used must be added to the accuracy specifications of instrument.
The Tektronix probe Interface is not provided, so the user m ust adjust the setting to match
the probe characteristics.
Sample, Peak Detect, and Average
Envelope mode not provided
±3% for Sample or Average acquisition mode, 5 V/div to 10 mV/div
±4% for Sample or Average acquisition mode, 5 mV/div and 2 mV/div
Measurement Type Accuracy
Average of ≥16 waveforms with
vertical position at zero
Average of ≥16 waveforms with
vertical position not at zero for 2 mV
to 200 mV/div.
Average of ≥ 16 waveforms with
vertical position not at zero for >200
mVto5V/div.
Change in measured volts between any two averages of ≥ 16 waveforms acquired under the
same setup and ambient conditions.
(3% of |reading| + 0.05 div)
Defined in Section 4.6 of IEEE std 1057. The difference between the upper and lower
frequencies, at which the amplitude response, as seen in the data record, is 0.707 (-3 dB) of
the response seen in the data record at the specified reference frequency. Specified only –3 dB
point, does not include in-band response.
TPS2012B and TPS2014B TPS2024B
DC to 100 MHz for all V/div settings
with bandwidth limit at full.
DC to ≥75 MHz for all V/div settings with bandwidth limit at full.
≤10 Hz at BNC
≤1 Hz when using a 10X passive probe
±(3% × |reading| + 0.1 div + 1 mV)
±[3% × (|reading + vertical position|) + 1% of |vertical
position| + 0.2 div + 2 mV]
±[3% × |reading + vertical position| + 1% of |vertical
position| + 0.2 div + 50mV]
DC to 200 MHz for all V/div settings 5 mV and above,
for operating temperatures from 0°C to 40 °C.
DC to 180 MHz for all V/div settings 5 mV/div and
above, for operating temperatures from 40 °C to
50 °C
2 TPS2000B Series Digital Storage Oscilloscopes Service Manual
Specifications
Table 1: Signal acquisition system (cont.)
Characteristic Description
Rise Time at BNC, typical
Peak Detect Response
Vertical P osition Range
Vertical Position Accuracy
Rejection, typical
Channel-Channel Common Mode
Rejection Ratio, typ ical
Channel-to-Channel Crosstalk
Waveform acquisition Rate, typical Up to 180 waveforms per second, per channel (Sample acquisition mode, no measurements)
1
The maximum peak-to-peak voltage that can be displayed is 40 V
TPS2012B and TPS2014B TPS2024B
<3.5ns <2.1ns
Rise time is generally calculated from the following formula: Rise time in ns = 350 / Bandwidth
in MHz
Captures 50% or greater amplitude of pulses ≥12 ns wide typical (50 s/div to 5 μs/div) in the
center 8 vertical divisions
2 mV/div to 200 mV/div, ±1.8 V
>200 mV/div to 5 V/div, ± 45 V
2 mV/div to 200 mV/div, ± (1% × selected value +0.1 div + 2 mV) within the range ±1.8 V
>200 mV/div to 5 V/div, ±(1% × selected value +0.1 div + 50 mV) within the r ange ±45 V
Greater than 1000:1 up to 50 MHz, derated to 400:1 at 200 MHzSingle Channel Common Mode
Sine wave with VOLTS/DIV setting at 5 mV. Signal applied between the channel (signal and
signal reference) and chassis. Ratio of the acquired signal amplitude to the amplitude of
the signal.
100:1 at 60 Hz, reducing to 10:1 with 50 MHz sine wave, with equal volts/div and coupling
settings on each channel.
With the same signal applied to each channel, this is the ratio of the acquired signal amplitude
to the amplitude of the MATH difference waveform, CH1–CH2, CH2–CH1, CH3–CH4, or
CH4–CH3.
TPS2012B and TPS2014B TPS2024B
50 MHz:≥100:1 100 MHz:≥100:1
Measured on one channel, with test signal applied between signal and common of the other
channel, and with the same VOLTS/DIV and coupling settings on each channel.
with 1x attenuation.
p-p
Time Base System
Table 2: Time base system
Characteristic Description
TPS2012B and TPS2014B TPS2024BSample Rate Range
5S/sto1GS/s 5S/sto2GS/s
Waveform Interpolation (sin x)/x
Waveform interpolation is activated for sweep speeds of 100 ns/div and faster.
Record Length
Sample Rate and Delay Time
Accuracy
TPS2000B Series Digital Storage Oscilloscopes Service Manual 3
2500 samples for each channel
TPS2012B and TPS2014B TPS2024BSeconds/Division Range
5 ns/div to 50 s/div, in a 1, 2.5, 5 sequence 2.5 ns/div to 50 s/div, in a 1, 2.5, 5 sequence
±50 ppm over any ≥1mstimeinterval
Specifications
Table2: Timebasesystem(cont.)
Characteristic Description
Position Range
2.5ns/divto10ns/div:(-4div×s/div)to20ms
25 ns/div to 100 ms/div: (-4 div × s/div) to 50 ms
250 μs/div to 10 s/div: (-4 div × s/div) to 50 s
25 s/div to 50 s/div: (-4 div× s/div) to 250 s
Delta Time Measurement Accuracy
(Full Bandwidth)
Conditions
Single-shot, sample mode ±(1 sample interval + 100 ppm × |reading|
>16 averages
The limits apply for signals having amplitude > 5 divisions, slew rate at the measurement
points of > 2.0 divisions/ns, and acquired > 10 mV/Div.
Sample interval is the time between the samples in the waveform record.
Triggering System
Accuracy
+0.6ns)
±(1 sample interval + 100 ppm × |reading|
+0.4ns)
Table 3: Triggering system
Characteristic Description
Holdoff Range
External Trigger Input Impedance
External Trigger Maximum Input
Voltage
External Trigger Maximum Float
Voltage
500 ns to 10 s
The ability to set large values of Holdoff is limited by the difficulty in adjusting the Holdoff
at Sec/Div settings less than 100 ms/div. This is because Holdoff cannot be set in Scan
Mode, which begins at 100 ms/div when Trigger Mode is AUTO. By adjusting Trigger Mode
to NORMAL, the Scan Mode operation is turned off, and Holdoff can be adjusted at larger
Sec/Div settings.
1M±2%inparallelwith20pF±3pF
300 V
150 V
CAT 1 and CAT II
RMS
CAT III
RMS
At front panel connector, signal input to BNC shell, 300 V
100 kHz to 13 V peak AC at 3 MHz and above.
Based upon sinusoidal or DC input signal. For nonsinusoidal waveforms, peak value must be
less than 420 V. Excursion above 300 V should be less than 100 ms duration. RMS signal level
must be limited to 300 V. If these values are exceeded, damage to the instrument may result.
Input is rated 300 V CAT II, signal to floating common.
Rated 600 V CAT II.
Instrument chassis is normally considered to be at earth ground.
Between instrument chassis and BNC shell
; derate at 20 dB/decade above
RMS
4 TPS2000B Series Digital Storage Oscilloscopes Service Manual
Table 3: Triggering system (cont.)
Characteristic Description
Trigger Sens
itivity, Edge Trigger
Type. DC Coupled
Trigger Sensitivity, Edge Trigger
Type, typical
SET LEVEL TO 50%, typical Operates with input signals equal to or greater than 50 Hz
Trigger Level Range
Trigger Source Sensitivity
All products
TSP2012B
1 div from DC to 10 MHz
1.5 div from 10 MHz to 100 MHz
TPS2014B
TSP2024B 1.5 div from 10 MHz to 100 MHz
2 div from 100 MHz to 200 MHz
EXT
1V
from 50 Hz to 100 MHz
p-p
from 100 MHz to 200 MHz
2V
p-p
EXT/5 5X the value of EXT
EXT/10 10X the value of EXT
The m inimum signal levels required for stable edge triggering of an acquisition when the trigger
Source is DC coupled. A stable trigger is one that results in a uniform, regular visual display,
triggered on the selected slope. The trigger point must not switch between opposite slopes on
the waveform, and the display must not “roll” across the screen on successive acquisitions.
Trigger Frequency Readout typically stabilizes at 25% more signal than generates a stable
visual display. At 5 mV/div, 50% additional signal is typically required.
Coupling Sensitivity
AC Same as DC-coupled limits from 50 Hz and above
NOISE REJ Reduces the DC-coupled trigger sensitivity by 2 times for greater
than 10 mv/div to 5 V/div
HF REJ
Same as the DC-coupled limit from DC to 7 kHz, attenuates signals
above 80 kHz
LF REJ
Same as the DC-coupled limits for frequencies above 300 kHz,
attenuates signals below 300 kHz
Using a 10 M probe will not affect the operation of this function.
Source
CH1, CH2, C H32,
2
CH4
Range
±8 divisions from center of screen
EXT ±4 V
EXT/5
EXT/10
±20 V
±35 V
The adjustable resolution for Trigger Level is 0.02 division for Ch1 or Ch2 source, (and Ch3,
Ch4 for the TPS2014B, TPS2024B)
20 mV for Ext source
100 mV for Ext/5 source
200 mV for Ext/10 source
Specifications
TPS2000B Series Digital Storage Oscilloscopes Service Manual 5
Specifications
Table 3: Triggering system (cont.)
Characteristic Description
Trigger Level Accuracy, typical
Default Settings, Video Trigger Coupling is AC and Auto except for a single sequence acquisition
Signal Formats and Field Rates,
Video Trigger Type
Sensitivity, Video Trigger Type,
typical
Pulse Width Trigger
Pulse Width Trigger modes
Pulse Width Trigger Point
Pulse Width Range
Pulse Width Resolution 16.5 ns or 1 part per thousand, whichever is larger
Equal Guard Band t > 330 ns: ±5% ≤ guard band < ±(5.1% + 16.5 ns)
Not Equal Guard Band t > 330 ns: ±5% ≤ guard band < ±(5.1% + 16.5 ns)
Trigger Frequency Counter
Readout Resolution 6 digits
Accuracy, typical
Accuracies are for signals having rise and fall times ≥20 ns
Source
Internal
EXT
EXT/5 ±(6% of setting + 500 mV) for signals less than ±10 V
EXT/10 ±(6% of setting + 1 V) for signals less than ±20 V
A sine wave with 20 ns rise time corresponds to about 18 MHz.
Supports NTSC, PAL, and SECAM broadcast systems for any field or any line
Composite video signal
Source
Internal
EXT
EXT/5 5 V of composite video
EXT/10 10 V of composite video
A 2 division composite video signal will have a 0.6 division sync tip.
Trigger when < (Less than), > (Greater than), = (Equal), or ≠ (Not Equal)
Positive pulse or Negative pulse
Equal: The oscilloscope triggers when the trailing edge of the pulse crosses the trigger level.
Not Equal: If the pulse is narrower than the specified width, the trigger point is the trailing
edge. Otherwise, the oscilloscope triggers when a pulse continues longer than the time
specified as the Pulse Width.
Less than: The trigger point is the trailing edge.
Greater than (also called time-out trigger): The oscilloscope triggers when a pulse continues
longer than the time specified as the Pulse Width.
Selectable from 33 ns to 10 s
t ≤ 330 ns: guard band = ±16.5 ns
165 ns < t ≤ 330 ns: guard band = -16.5 ns ±33 ns
t ≤165 ns: guard band = ±16.5 ns
±51 ppm including all frequency reference errors and ±1 count errors
Accuracy
±(0.2div+5mV)within±4divisions from center screen having rise
and fall times of >20 ns.
±(6% of setting + 250 mV) for signals less than ±2 V
Range
Peak-to-peak amplitude of 2 div
1 V of composite video
6 TPS2000B Series Digital Storage Oscilloscopes Service Manual
Table 3: Triggering system (cont.)
Characteristic Description
Frequency Range
AC coupled, 10 Hz minimum to rated bandwidth.
Signal Source Pulse Width/ Edge Trigger: all available trigger sources.
Frequency Counter measures trigger source at all times, including when the oscilloscope
acquisition is halted due to changes in the run status, or acquisition of a single shot event
has completed.
Pulse Width Trigger: The oscilloscope counts pulses of signifi cant magnitude inside the
250 ms measurement window that qualify as triggerable events, such as narrow pulses in a
PWM pulse train if set to < mode and the width is set to a relatively small time.
Edge Trigger: The oscilloscope counts all edges of sufficient magnitude and correct polarity.
Video Trigger: The Frequency Counter does not operate.
1
Available only on 4-channel oscilloscopes.
2
TPS2024B only.
Display
Specifications
Table 4: Display
Characteristic
Type
Resolution 320 horizontal by 240 vertical pixels
Brightness, typical
Backlight Intensity
1
Available through the display menu.
Description
11.5 cm (W) x 8.64 cm (H), 14.38 cm diagonal, ¼ VGA, active TFT color liquid crystal display
(LCD) with color characters/waveforms on a black background. Surface anti-glare (3H)
treatment
400 typical, 320cd/m
2
min.
Three strings of 5 LEDs in series.
Variable minimum is 14.85 V.
Variable maximum is 18.15 V.
1
1
Typical current is 25 mA for each of the three strings.
Batteries
Table 5: Batteries
Characteristic
Real-Time Clock Battery
Real-Time Clock Battery The battery maintains time-of-day information when the oscilloscope is powered off.
Li Ion Battery Packs
Description
The battery is sized to provide 5 years of service life.
The estimated time that the clock will remain powered from the battery is 5 years.
Environmental conditions, especially humidity, affect the number. The battery is not
user-replaceable.
TPS2000B Series Digital Storage Oscilloscopes Service Manual 7
Specifications
Table 5: Batteries (cont.)
Characteristic
Type
Nominal Capacity
Battery Life
Charge time, nominal
Description
System supports 2 type NI2040 Li Ion Battery Packs
6600 mAH
5.5 hours per battery, 2 channel models
4.5 hours per battery, 4 channel models
300 charge/discharge cycles.
Battery will still have 80% of rated capacity after 300 charge cycles.
Instrument nonoperating: 4.5 hours
Instrument operating: 6.5 hours
External DC Input
Table 6: External DC input
Characteristic
Voltage 15 V, ±1 V
Current consumption
Connector type
Description
The input is not protected from the electrically harsh automobile electrical system. Operation
from a vehicle requires a specifically designed external power supply.
Typical Power draw from External DC input:
2 channel models, charging a battery: 21 W
2 channel models, no battery: 13 W
4 channel models, charging a battery: 30 W
4 channel models, no battery: 18 W
Charging only, instrument OFF: 28 W
Maximum power draw from AC line by AC Adapter, 36 watts
2.5 mm male. Use a mating connector with a 2.5 mm barrel hole.
Center conductor: positive
Outer conductor: negative
External Interfaces
Table 7: External interfaces
Characteristic Description
Interfaces for data communication
and probe compensation
Probe Compensator output voltage,
typical
Probe Compensator output
frequency, typical
8 TPS2000B Series Digital Storage Oscilloscopes Service Manual
RS-232, Parallel port, Compact flash, Probe compensation
5 V p-p, ±10% into ≥1MΩ load
1kHz
Specifications
Mechanical Ch
aracteristics
Table 8: Mechanical characteristics
Characteris
tic
Weight, approximate
Dimensions, without
front prot
Dimensi
ective cover
ons, with front
protective cover
ng method
Cooli
Description
Instrument only
1 battery installed
2 batteries installed
Height
Width
Depth
Height
Width
Depth
rature controlled fan. Intake vents on the bottom; exhaust on the right side.
Temp e
2.7kg(6.0lb
3.2kg(7.0l
3.7kg(8.0
lbs)
161 mm (6.3
336 mm (13
130 mm (5.
164 mm (6
347 mm (
135 mm (
1in)
.45 in)
13.65 in)
5.3 in)
s)
bs)
3in)
.24 in)
Environmental Performance
Table 9: Environmental performance
Characteristic
Temperature
Humidity
Altitude, Operating and
Nonoperating
Pollution Degree 2
Random Vibration
Mechanical Shock,
operating
1
2
3
4
4
Charge battery packs between 0 °C and 45 °C (32 °F to 113 °F). Charging battery packs outside this range can damage cells or cause them to leak.
Battery packs are rated to operate between -10 °C and +50 °C (-14 °F and +122 °F) with less than 80% relative humidity. Operating outside this range can
cause damage. Battery discharge capacity drops significantly at temperatures below 0 °C (32 °F) and above 45 °C (113 °F).
Max wet bulb.
With one battery pack installed.
Description
Operating
1
0°C to 50 °C (32 °F to 122 °F),
with 5°C/minute maximum gradient,
Nonoperating
-40 °C to +71 °C (-40 °F to 159.8 °F), with 5°C/minute
maximum gradient.
1
noncondensing, up to 3000 altitude.
Operating
2
5% to 90% relative humidity (%RH) at up
to +30 °C (86 °F )
5% to 60% relative humidity (%RH) at up
to +50 °C (122 °F)
Nonoperating
5% to 90% relative humidity (%RH) at up to +30 °C
(86 °F)
5% to 60% relative humidity (%RH) between +30 °C
(86 °F) and +71 °C ( 160 °F) noncondensing.
2
3
3
3,000 m (10,000 ft)
Altitude is limited by possible damage to the LCD at higher altitudes. This damage is independent of
operation.
Operating
0.31 g
from 5 Hz to 500 Hz, 10 minutes
RMS
on each axis, 3 axes (30 minutes total).
Nonoperating
2.46 g
from 5 Hz to 500 Hz, 10 minutes on each axis,
RMS
3 axes (30 minutes total).
Half-sine mechanical shocks, 50 g peak amplitude, 11 ms duration, 3 drops in each direction of each
axis (18 total)
TPS2000B Series Digital Storage Oscilloscopes Service Manual 9
Specifications
10 TPS2000B Series Digital Storage Oscilloscopes Service Manual
Operating Information
For information on installing and operating your TPS2000B Series Digital Storage
Oscilloscope, refer to the TPS2000B Series Digital Storage Oscilloscope User
Manual.(See
page ix, Related Manuals.)
TPS2000B Series Digital Storage Oscilloscopes Service Manual 11
Operating Information
12 TPS2000B Series Digital Storage Oscilloscopes Service Manual
Theory of Operation
This section describes the electrical operation of the TPS2000B Series
oscilloscopes to the module level. It describes the basic operation of each
functional c
ircuit block shown in the following figure.
Figure 1: TPS2000B Series module-level block diagram. Remove CH3 and CH4
r a 2-channel version
fo
TPS2000B Series Digital Storage Oscilloscopes Service Manual 13
Theory of Operation
Acquisition Board
The Acquisition board of the TPS2000B Series four-channel oscilloscope is
essentially a dual, two-channel oscilloscope tied together through a common
microprocessor, and some special interconnects. This allows the combining of the
display and trigger systems. The focus of this Acquisition board discussion is on
the two-cha
At a minimum, the Acquisition board contains the following components:
Attenuators
ASIC amplifier
Isolation circuit
Digitizer-trigger system ASIC
nnel system, with differences noted as necessary.
Acquisition System
Signal-
RAM
FLASH ROM
Microprocessor
Internal peripheral interface
Power supplies
For a
the other aspects o f the circuitry are the same as for the two-channel oscilloscope.
Signals from the CH 1, CH 2, and other input connectors pass through attenuators
danAC-couplingswitchtotheamplifier ASIC. The EXT TRIG input uses
an
an abbreviated version of this path, without some of the attenuator settings and
the AC coupling switch.
The amplifier ASIC contains buffers and variable gain amplifi ers, as well as
filters that provide 20 MHz bandwidth limiting. The task of the amplifier ASIC
is to convert from a 1 MΩ single-ended environment in the input to a much
lower impedance differential (and thus less noise-sensitive) environment for the
isolation and acquisition process. The amplifier ASIC assures that the input signal
is amplified to approximately the correct level to allow the fullest possible use of
the isolation circuit and digitizer.
processing/display/system services ASIC
four-channel oscilloscope, the attenuators and ASICs are duplicated. Most of
The isolation circuit uses a modulation clock to transfer the input signal across the
isolation boundary via an isolation transformer. The input signal is demodulated
and sent to the acquisition ASIC. Control of the amplifier ASIC across the
isolation boundary is provided by an optocoupler. Power is provided to each
amplifier A S IC and associated circuits by an isolated switching power supply,
dedicated to each channel.
14 TPS2000B Series Digital Storage Oscilloscopes Service Manual
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