Equipment information
BK Precision 2520 Oscilloscope
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Model:
2520
Date:
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Description:
20 MHz DUAL-CHANNEL DIGITAL STORAGE OSCILLOSCOPE
Information
DIGITAL FEATURES
1024 x 8-Bit Memory
Vertical resolution of 1 in 256 {approximately 30 steps/div)
and horizontal resolution of 1 in 1024 (100 samples/div).
2 Msample/sec Sampling Rate
Allows capture of one time events with pulse widths of 5 ps
or greater.
Equivalent Time Sampling
Allows repetitive waveforms of up to 20 MHz to be digitized
and stored.
Capture Pretrigger Information
Allows selection of 0%, 25%, 75%, or 100% of the stored
waveform to be pretrigger information.
Armed Store Mode
In the Armed/Store mode the Oscilloscope begins storing
information on trigger and continues through the entire sweep.
Roll Mode
In the Roll mode of operation, the trace moves across the
display from right to left like a strip chart recorder.
Ideal for capturing very slow events and pretrigger information.
DUAL TRACE FEATURES Dual Trace
Model 2520 has two vertical input channels for displaying
two waveforms simultaneously. Selectable single trace
(either CH 1 or CH 2) or dual trace for both analog and
digital operating modes. Alternate or chop sweep
automatically selected by TIME/DIV control.
Sum and Difference Capability
Permits algebraic addition or subtraction of channel 1 and
channel 2 waveforms in the analog operating mode, displayed
as a single trace. Useful for differential voltage and
distortion measurements.
CRT FEATURES
Rectangular CRT
Rectangular CRT with large 8 x 10 centimeter viewing area.
Internal 8 x 10 division graticule eliminates parallax error.
Convenience
Trace rotation electrically adjustable from front panel. 10%
and 90% markers for rise time measurements.
VERTICAL FEATURES
High Sensitivity
2 mV/div sensitivity for full bandwidth.
Calibrated Voltage Measurements
Accurate voltage measurements (±3%) on
12 calibrated ranges from 2 mV/div to 10 V/ div* Vertical
gain fully adjustable between calibrated ranges.
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Calibrated Time Measurements
Accurate (±3%) time measurements. In analog display mode,
Model 2520 has 18 calibrated ranges from 0.2 s/div to 0.5
tfs/div. Sweep time is fully adjustable between calibrated
ranges. In digital display mode, 26 calibrated ranges are
available from
0.5 ps/div to 50 sec/div.
X10 Sweep Magnification
Allows closer examination of waveforms, increases maximum
sweep rate to 50 ns/div. Allows digitized waveforms to be
expanded even after they have been stored.
TRIGGERING FEATURES
Auto Sweep
Selectable Auto sweep provides sweep without trigger input,
automatically reverts to triggered sweep operation when
adequate trigger is applied.
Triggered Sweep (Normal Triggering)
Sweep remains at rest unless adequate trig-* ger signal is
applied. Fully adjustable trigger level and (+) or (-) slope.
Three Trigger Sources
Three trigger source selections, including CH 1, CH 2, and
Ext Trig.
Three Trigger Coupling Choices
Selectable AC, DC, or TV trigger coupling.
Video Sync
Frame or Line triggering selectable for observing composite
video waveforms.
X-Y Operation
Channel 1 can be applied as horizontal deflection (X-axis)
while channel 2 provides vertical deflection (Y-axis).
OTHER FEATURES
Z MOD Input
Intensity modulation capability permits time or frequency
markers to be added. Trace decreases in intensity with
positive signal, TTL compatible.
Built-In Probe Adjust Square Wave
A 1 V p~p, 1 kHz square wave Generator permits Probe
compensation adjustment.
Supplied With Probes
Oscilloscope comes with two identical 10:1 probes (Model PR-47).
Plotter Output
Rear panel outputs allow a stored waveform to be fed to an
analog plotter.
Manual Type:
User Manual
Pages:
42
Size:
2.67 Mbytes (2795341 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
Quality:
Scanned document, all readable.
Upload date:
2017 01 24
MD5:
ad844c47a7497d3bffa4430d233820ec
Downloads:
562
Information
Important safety precautions ... I
INSTRUCTION BOOK(CD-ROM)
1 SERVICE CAUTIONS AND NOTES
1.1. SERVICE POSITION ... 1
1.2. How to display Lamp operation time
(Service Mode) ... 2
1.3. How to initialize EEPROM IC ... 2
1.4. Lamp replacement procedure ... 3
1.5. Cleaning the Projection Lens ... 4
1.6. Connection of the Flexible Cables to Trap
Connector ... 4
1.7. How to replace the lithium battery ... 4
2 DISASSEMBLY/ASSEMBLY
PROCEDURES ... 5
2.1. DISASSEBLY FLOWCHART OF
CABINET PARTS ... 5
2.2. DISASSEMBLY METHOD OF
CABINET PARTS ... 5
2.3. DISASSEBLY FLOWCHART OF
OPTICAL UNIT ... 11
3 ADJUSTMENT PROCEDURES ... 13
3.1. INITIAL GUIDE LINE ... 13
3.2. TEST EQUIPMENT ... 13
3.3. HOW TO READ THE ADJUSTMENT
PROCEDURES ... 15
3.4. ADJUSTMENT PROCEDURES ... 15
4 TROUBLESHOOTING HINTS ... 22
5 SCHEMATIC DIAGRAM ... 26
5.1. SCHEMATIC DIAGRAM NOTES ... 26
5.2. BLOCK DIAGRAM ... 27
5.3. INTERCONNECTION SCHEMATIC DIAGRAM .. 28
5.4. DIGITAL SECTION SCHEMATIC
DIAGRAM (MAIN PWB) V-LSEP3030D1 ... 30
5.5. LCD DRIVE SECTION SCHEMATIC
DIAGRAM (MAIN PWB) V-LSEP3030D1 ... 32
5.6. RGB/VIDEO SECTION SCHEMATIC
DIAGRAM (MAIN PWB) V-LSEP3030D1 ... 34
5.7. POWER/AUDIO SECTION SCHEMATIC
DIAGRAM (MAIN PWB) V-LSEP3030D1 ... 36
5.8. AD/DA/TG SECTION SCHEMATIC
DIAGRAM (MAIN PWB) V-LSEP3030D1 ... 38
5.9. IO/ROM SECTION SCHEMATIC
DIAGRAM (MAIN PWB) V-LSEP3030D1 ... 40
5.10. OPERATION SCHEMATIC DIAGRAM
(V-LESP0A34A1) ... 42
5.11. THERMISTOR SCHEMATIC DIAGRAM
(V-LSEP0A35A1) ... 42
5.12. OPERATION PWB (V-LESP0A34A1) ... 43
5.13. THERMISTOR PWB (V-LSEP0A35A1) ... 43
5.14. MAIN PWB (V-LSEP3030D1) ... 44
6 VOLTAGE CHART ... 48
6.1. DIGITAL SECTION VOLTAGE CHART ... 48
6.2. LCD DRIVE SECTION VOLTAGE CHART ... 48
6.3. RGB/VIDEO SECTION VOLTAGE CHART ... 49
6.4. POWER/AUDIO SECTION VOLTAGE CHART ... 49
6.5. AD/DA/TG SECTION VOLTAGE CHART ... 50
6.6. IO/ROM SECTION VOLTAGE CHART ... 50
7 WAVEFORM ... 51
8 PARTS LIST ... 52
8.1. BOTTOM CASE SECTION ... 52
8.2. TOP CHASSIS SECTION ... 53
8.3. OPTICAL BLOCK SECTION ... 54
8.4. TOP COVER SECTION ... 55
8.5. FRONT COVER SECTION ... 56
8.6. PACKING SECTION ... 57
8.7. ASSEMBLY PARTS LIST ... 58