Applications
Acquiring, displaying,
and measuring waveforms
Benchtop lab and
portable applications
Manuals
User
Manual
Programmer
Manual
Technical
Reference
Reference
Probes
P6245
1.5 GHz 10X Active Probe
MSL Local Information
The instrument is
located in room 241
All the manuals are
on the shelves in 244 and should be returned there
Specifications
Channels
Samplers
Bandwidth
Sensitivity
Offset
Maximum
Sample Rate
Maximum
Record Length
Time
Base System
Vertical
System
Acquisition
Modes
Trigger
Types
Triggering
System
Display
Zoom
Measurement
System
Waveform
Processing
Computer
Interface
Hardcopy
Storage
CRT
Power
Requirements
Environmental
and Safety
Manuals
This is the User Manual for the TDS 684B Digitizing Oscilloscope.
The chapter Getting Started briefly describes the TDS Oscilloscope,
prepares you to install it, and tells you how to put it into service.
The chapter Operating Basics covers the basic principles of the operation
of the oscilloscope. The operating interface illustrations and the
tutorial examples rapidly help you understand how your oscilloscope operates.
The chapter Reference teaches you how to perform specific tasks.
See pages 3-1 for a complete list of operating tasks covered in that
chapter.
The Appendices provide an options listing, an accessories listing,
and other useful information.
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This programmer manual covers the TDS 684B as well as other digitizing
oscilloscopes. It also covers Advanced DSP Math, the RS-232/Centronics
Interface, and the Option 05 Video Trigger. This manual provides
information on operating your oscilloscope using the General Purpose Interface
Bus (GPIB) interface.
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This is the Performance Verification and Specifications for the TDS 684B
as well as other digitizing oscilloscopes. It contains procedures suitable
for determining if each instrument functions, was properly adjusted, and
meets the performance characteristics as warranted. Technical
specifications are also contained in this document.
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This manual provides a quick illustrated overview of how to operate your
digitizing oscilloscope.
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Probes
The Tektronix P6245 is a 1.5 GHz (probe only), 10X active FET probe with
less than 1 pF input capacitance. The P6245's low input capacitance
and high input resistance minimize circuit loading over a wide bandwidth
range. The P6245's small profile and low-mass head makes probing crowded
circuits by hand fast and easy. The accessory tips and adapters enable
the P6245 to be used on a wide variety of circuit architectures.
The P6245 is powered through a TEKPROBE interface between the probe's
compensation box and the oscilloscope. The P6245 may be used with
non-TEKPROBE oscilloscopes and instruments by using the optional Tektronix
1103 Probe Power Supply.
An Instruction Manual is available for this probe.
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Specifications
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* Reduce the upper bandwidth frequencies by 5 MHz for each degree C above
30 degree C.
** 50 ohm; 1 mV/div: 500 MHz, 2 mV/div: 600 MHz, 5 mV/div: 750 MHz, 10 mV/div:
1 GHz.
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CH1, CH2: 1 mV to 10 V/div
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CH3, CH4: 1 mV to 10 V/div
-
Position Range: ±5 Divisions.
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CH1, CH2 CH3 (AUX1), CH4 (AUX2):
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±1 V from 1 mV to 100 mV/div
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±10 V from 101 mV to 1 V/div
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±140 V from 1.01 V to 10 V/div
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Any One Channel: 5 GS/s
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Any Two Channels: 5 GS/s
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Three, Four Channels: 5 GS/s
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Any One Channel: 15K pts
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Any Two Channels: 15K pts
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Any Three, Four Channels: 15K pts
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Time Bases: Main, Delayed.
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Time Base Range: 200 ps to 10 s/div.
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Time Base Accuracy: ±100 ppm (over any interval >/=1 ms)
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Pre-Trigger Position: 0% to 100% of any record
-
Delay Between Channels: </=100 ps (any 2 channels with equal V/div and
coupling)
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DC Gain Accuracy:
-
±1.5% for sensitivities from 2 mV/div to 10 V/div
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±2.0% at 1 mV/div
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Vertical Resolution: 8 bits (256 levels over 10.24 vertical divisions).
>11 bits with averaging.
-
Analog Bandwidth Selections: 20 MHz, 250 MHz, and full
-
Step Response Settling: </=0.5% error within 20 ns of a </=2
V step.
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Effective Bits: 6.3 Bits (5 GS/s)
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Input Coupling: AC, DC , or GND
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Input Impedance Selections: 1 Megohm in parallel with 10 pF, or 50
ohm (AC and DC coupling).
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Maximum Input Voltage: ±400 V (DC+ peak AC). Derate at 20 dB/decade
above 1 MHz. 1 Megohm or GND coupled.
-
Channel Isolation: >/=100:1 at 100 MHz and >/=30:1 at bandwidth
for any two channels having equal Volts/div settings.
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AC Coupled Low Frequency Limit: </=10 Hz when AC 1 Megohm coupled.
</=200 kHz when AC 50 ohm coupled.
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Sample: Sample data only.
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Peak Detect: High frequency and random glitch capture. Captures glitches
of <1 ns .
-
-
Envelope: Max/min values acquired over one or more acquisitions.
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Average: Waveform averages selectable from 2 to 10,000.
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Single Sequence: Use Run/Stop button to capture a single triggered acquisition
at a time which may be automatically saved to NVRAM with AutoSave.
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EDGE (main and delayed): Conventional level driven trigger. Positive or negative
slope on any channel or rear panel auxiliary input. Coupling Selections:
DC, AC, noise reject, HF reject, LF reject.
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PULSE (main):
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WIDTH: Trigger on width of positive or negative pulse either within or not
within selectable time limits. Time limits settable from 1 ns to 1 s.
-
GLITCH: Trigger on or reject glitches of positive, negative or either polarity.
Minimum glitch width threshold is 1.0 ns, with 200 ps resolution.
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RUNT: Trigger on a pulse that crosses one threshold but fails to cross a
second threshold before crossing the first again.
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SLEW RATE: Trigger on pulse edge rates that are either faster or slower than
a set rate. Edges can be rising, falling, or either.
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TIMEOUT: Trigger on an event which remains high, low, or either, for a
user-specified time. Time range is settable from 1 ns to 1 s, with 200 ps
resolution.
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PATTERN: Specifies a logical combination (AND, OR, NAND, NOR) of the four
input channels (Hi, Lo, Don't Care). Trigger when pattern stays True or False
for user specified time.
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STATE: Any logical pattern of channels 1, 2 and 3 (AUX1 on TDS 620A) plus
clock edge on channel 4 (AUX2 on TDS 620A). Triggerable on positive or negative
clock edge.
-
SETUP & HOLD: Trigger on violations of both setup time and hold time
between clock and data which are on separate input channels.
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Video (Optional) NTSC, PAL, HDTV, FlexFormatTM: Trigger on a particular line
of individual, odd/even, or all fields. Trigger on a specific pixel of a
line by using video trigger with delay by events. Choose horizontal sync
polarity. Choose from popular HDTV formats (1125/60, 1050/60 1250/50, 787.5/60)
or use FlexFormatTM for other HDTV-type formats by defining frame rep rate,
number of lines and fields, and sync timing structure.
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Triggers: Main, Delayed.
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Main Trigger Modes: Auto, Normal, Single.
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Delayed Trigger: Delayed by time, events, or events and time.
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Time Delay Range: 16 ns to 250 s.
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Events Delay Range: 1 to 9,999,999 events.
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External Rear Input: >/=1.5 kilohm; Max input voltage is ±20 V (DC
+ AC peak).
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Waveform Style: Dots, vectors, variable persistence selectable from 250 ms
to 10 s, infinite persistence, and intensified samples.
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Color: Standard palettes and user definable colors for waveforms, text,
graticules, and cursors. Measurement text and cursor colors matched to waveform.
Waveform collision areas highlighted with different color. Statistical waveform
distribution shown with color grading through variable persistence.
-
Color Grading: With variable persistence selected, historical timing information
is represented by temperature or spectral color scheme providing "z-axis"
information about rapidly changing waveforms.
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Gray Scaling: With variable persistence selected, waveform points time-decay
through 16 levels of intensity.
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Waveform Capture Rate: For 500 point waveforms with infinite persistence
mode selected: 100/sec typically.
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Graticules: Full, grid, cross hair, frame. NTSC and PAL with video trigger
option.
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Format: YT and XY.
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Fit to Screen: Entire acquisition memory displayed on screen.
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The zoom feature allows waveforms to be expanded or compressed in both vertical
and horizontal axes. Allows precise comparison and study of fine waveform
detail without affecting ongoing acquisitions. When used with HiRes or Average
acquisition modes, Zoom provides an effective vertical dynamic range of 1000
divisions or 100 screens.
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Dual Window Zoom: Dual graticules simultaneously show selected and zoomed
waveforms. Up to two zoom boxes show areas on the selected trace that are
being magnified, and the two magnified areas can be overlapped for quick
comparison. Color of zoomed trace matches selected trace.
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Automatic Waveform Measurements: Period, Frequency, High, Low, + Width, -Width,
Maximum, Minimum, Rise, Fall, Peak to Peak, Amplitude, + Duty cycle, -Duty
cycle, + Overshoot, -Overshoot, Propagation Delay, Burst Width, Mean, Cycle
Mean, RMS, Cycle RMS, Area, Cycle Area, Phase.
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Continuous update of up to four measurements on any combination of waveforms.
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Thresholds: Settable in percentage or voltage.
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Gated: Any region of the record may be isolated for measurement using vertical
bars.
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Snapshot: Performs all measurements on any one waveform showing results from
one instant in time.
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Cursor Measurements: Absolute, Delta; Volts, Time, Frequency. NTSC IRE and
Line Number with video trigger option.
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Time Measurements Accuracy: (Single Shot Typical) <50 ps typical (TDS
680B/684B) <110 ps @ 2.5 GS/s (TDS 620B/644B)
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Cursor Types: Horizontal bars (volts); Vertical bars (time); operated
independently or in tracking mode.
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Waveform Functions: Interpolate-selectable sin(x)/x or linear, Average, Envelope.
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Advanced Waveform Functions: (Standard on TDS 644B/684B) FFT, Integration,
Differentiation.
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Arithmetic Operators: Add, Subtract, Multiply, Divide, Invert.
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Autosetup: Single button, automatic setup on selected input signal for vertical,
horizontal and trigger systems.
-
Waveform Limit Testing: Compares incoming or math waveform to a reference
waveform's upper and lower limits.
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GPIB (IEEE-488.2) Programmability: Full talk/listen modes. Control of all
modes, settings, and measurements.
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Printer: HPThinkjet, Epson, Interleaf, Deskjet, Deskjet Color, Laserjet,
PostScript, TIFF, PCX, BMP (Microsoft Windows), DPU 411/412, RLE.
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Plotter: HPGL.
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Interface: GPIB standard.
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Hardcopy Interface: (Standard on TDS 644B/684B) Centronics and RS-232.
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Waveforms: Four 15 K point records.
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Setups: 10 front panel setups.
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Floppy Drive: (Standard on TDS 644B/684B) Store reference waveforms, setups,
and image files on 3.5 inch 1.44 MByte or 720 KByte DOS format floppy disk.
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Type: (TDS 620B/680B) 7 in. diagonal, magnetic deflection. Horizontal
raster-scan. P4 White phosphor.
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Type: (TDS 644B/684B) 7 in. diagonal, NuColorTM liquid crystal full color
shutter display. 256 color levels.
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Resolution: 640 horizontal by 480 vertical displayed pixels (VGA).
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Line Voltage Range: 90 to 250 V RMS.
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Line Frequency: 45 to 440 Hz.
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Power Consumption: 300 Watts max.
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Temperature:
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Operating: +4 to +45 degree C (floppy not used) +10 to +45 degree C (floppy
in use)
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Nonoperating: -22 to +60 degree C.
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Humidity:
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Operating (floppy not used): 20% to 80% RH at </=32 degree C. Upper limit
derates to 30% RH at +45 degree C.
-
Operating (floppy in use): 20% to 80% RH at </=32 degree C. Upper limit
derates to 30% RH at +45 degree C.
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Nonoperating: 5% to 90% RH at </=41 degree C. Upper limit derates to 30%
RH at +60 degree C.
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Altitude:
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Operating: 15,000 ft.
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Nonoperating: 40,000 ft.
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Electromagnetic Compatibility: Meets or exceeds Vfg. 243/1991 amended per
Vfg. 46/1992; FCC 47 CFR, Part 15, Subpart B, Class A; EN 50081-1; and EN
50082-1.
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Safety: Listed UL 1244; CSA - C22 No. 23; Tektronix self-certification to
comply with IEC 348 recommendations.
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Send questions or comments to
mahaney@cs.unc.edu
This Page was created by
Jim
Mahaney and last updated on August 15, 1997