B&K Precision 2160C Datasheet

TEST INSTRUMENT SAFETY

WARNING

Normal use of test equipment exposes you to a certain amount of danger from electrical shock because
testing must often be performed where exposed high voltage is present. An electrical shock causing
10milliampsofcurrenttopassthroughthe heartwillstopmosthumanheartbeats.Voltageaslow as 35 volts
dc or ac rms should be considered dangerous and hazardous since it can produce a lethal current under
certain conditions. Higher voltage poses an even greater threat because such voltage can more easily
produce a lethal current. Your normal work habits should include all accepted practices that will prevent
contact with exposed high voltage, and that will steer current away from your heart in case of accidental
contact with a high voltage. You will significantly reduce the risk factor if you know and observe the
following safety precautions:

1. Don’t expose high voltage needlessly in the equipment under test. Remove housings and covers only when necessary.
Turn off equipment while making test connections in high-voltage circuits. Discharge high-voltage capacitors after
removing power.

2. If possible, familiarize yourself with the equipment being tested and the location of its high voltage points. However,
remember that high voltage may appear at unexpected points in defective equipment.

3. Use an insulated floor material or a large, insulated floor mat to stand on, and an insulated work surface on which to
place equipment; make certain such surfaces are not damp or wet.

4. Use the time-proven “one hand in the pocket” technique while handling an instrument probe. Be particularly careful to
avoid contacting a nearby metal object that could provide a good ground return path.

5. When using a probe, touch only the insulated portion. Never touch the exposed tip portion.

6. When testing ac powered equipment, remember that ac line voltage is usually present on some power input circuits such
as the on-off switch, fuses, power transformer, etc. any time the equipment is connected to an ac outlet, even if the
equipment is turned off.

7. Some equipment with a two-wire ac power cord, including some with polarized power plugs, is the “hot chassis” type.
This includes most recent television receivers and audio equipment. A plastic or wooden cabinet insulates the chassis
to protect thecustomer. When the cabinet is removed for servicing, a serious shock hazard exists if the chassis is touched.
Not only does this present a dangerous shock hazard, but damage to test instruments or the equipment under test may
result from connecting the ground lead of most test instruments (including this oscilloscope) to a “hot chassis”. To make
measurements in “hot chassis” equipment, always connect an isolation transformer between the ac outlet and the
equipment under test. The B+K Precision Model TR-110 or 1604A Isolation Transformer, or Model 1653A or 1655A
AC Power Supply is suitable for most applications. To be on the safe side, treat all two wire ac powered equipment as
“hot chassis” unless you are sure it has an isolated chassis or an earth ground chassis.

8. Never work alone. Someone should be nearby to render aid if necessary. Training in CPR (cardio-pulmonary
resuscitation) first aid is highly recommended.

TABLE OF CONTENTS

Page Page

TEST INSTRUMENT SAFETY . . . . . . inside front cover

FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

CONTROLS AND INDICATORS . . . . . . . . . . . . . . . . . . 7

General Function Controls . . . . . . . . . . . . . . . . . . . . . . 7

Vertical Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Horizontal Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Triggering Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Rear Panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . 10

OPERATING INSTRUCTIONS. . . . . . . . . . . . . . . . . . . 11

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Equipment Protection Precautions. . . . . . . . . . . . . . . 11

Operating Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Initial Starting Procedure . . . . . . . . . . . . . . . . . . . . . . 12

Single Trace Display . . . . . . . . . . . . . . . . . . . . . . . . . 12

Dual Trace Display. . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Triggering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Magnified Sweep Operation . . . . . . . . . . . . . . . . . . . 15

OPERATING INSTRUCTIONS (Continued)

X−Y Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Video Signal Observation . . . . . . . . . . . . . . . . . . . . . 15

Application Guidebook . . . . . . . . . . . . . . . . . . . . . . . 15

Delayed Sweep Operation. . . . . . . . . . . . . . . . . . . . . 15

Component Test Operation . . . . . . . . . . . . . . . . . . . . 16

MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Line Voltage Selection. . . . . . . . . . . . . . . . . . . . . . . . 20

Periodic Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . 20

Calibration Check . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Instrument Repair Service. . . . . . . . . . . . . . . . . . . . . 21

APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Important Considerations for Rise Time and

Fall Time Measurements . . . . . . . . . . . . . . . . . . . . 22

2121

C Specifications & Operating Instruction .. . .. ...23

Service Information. . .. . .. . .. . .. . .. . .. . .. . .. . ..............26

“Guidebook

Availability. .. . .. . .. . .. . .. . .. . ..insideback cover

To Oscilloscopes”

2

FEATURES

AUTO Sweep

Selectable AUTO sweep provides sweep without trig­ger input, automatically reverts to triggered sweep
operation when adequate trigger is applied.

Five Trigger Sources

Five trigger source selections, including CH 1, CH 2,
alternate, EXT, and LINE.

Video Sync

Frame (TV V) or Line (TV H) triggering selectable for
observing composite videowaveforms. TV-H position
can also be used as low frequency reject and TV-V
position can be used as high frequency reject.

Variable Holdoff

Trigger inhibit period after end of sweep adjustable.
Permits stable observation of complex pulse trains.

OTHER FEATURES

X−Y Operation

Channel 1 can be applied as horizontal deflection
(X-axis) while channel 2 provides vertical deflection
(Y-axis).

Built-in Probe Adjust Square Wave

A 2 V p-p, 1 kHz square wave generator permits probe
compensation adjustment.

Component Test Function (Model 2125C & 2160C)

Built-in X−Y type component tester applies fixed level

ac signal to components for display of signature on
CRT.

Channel 2 (Y) Output (Model 2125C & 2160C)

A buffered 50Ω output of the channel 2 signal is

available at the rear panel for driving a frequency
counter or other instruments. The output is 50 mV/div

(nominal) into 50Ω.

Z-Axis Input (Model 2125C & 2160C)

Rear panel Z-Axis input allows intensity modulation.

Supplied With Two Probes

4

SPECIFICATIONS

Trigger Coupling:

AUTO: Sweep free-runs in absence of

suitable trigger signal.

NORM: Sweep triggered only by adequate

trigger signal.

TV-V: Video vertical sync pulses are

selected. Also usable for high
frequency reject.

TV-H: Video horizontal sync pulses are

selected. Also usable for low
frequency reject.

Trigger Sensitivity:

Auto: 1.5 div (internal)

≥0.5 Vp-p (external)

100 Hz – 40 MHz (2125C)
100 Hz – 30 MHz (2120C)

Norm: 1.5 div (internal)

≥0.5 Vp-p (external)

100 Hz – 40 MHz (2125C)
DC – 30 MHz (2120C)

TV-V: 1.0 div (internal)

≥0.5 Vp-p (external)

DC – 1 kHz (2125C)
20 Hz – 1 kHz (2120C)

TV-H: 1.0 div (internal)

≥0.5 Vp-p (external)

1 kHz– 100 kHz

Maximum External Trigger Voltage: 300 V (dc + ac

peak).

COMPONENTTESTER (Modes 2125C & 2160C)

Components Tested: Resistors, capacitors, inductors, and

semiconductors.

Test Voltage: 6 V rms maximum (open).

Test Current: 11 mA maximum (shorted).

Test Frequency: Line frequency (60 Hz in USA).

OTHER SPECIFICATIONS

Cal/Probe Compensation Voltage: 2 V p-p ±3% square

wave, 1 kHz nominal.

CH 2 (Y) Output (Models 2125C & 2160C):

Output Voltage: 50 mV/div (nominal into 50 ohm

load).

Output Impedance: Approximately 50 ohms.

Frequency Response: 20 Hz to 30 MHz, −3 dB.

Intensity Modulation (Models 2125C & 2160C)

Input Signal: TTL level, intensity increasing with

more positive levels, decreased intensity with more
negative levels.

Inpu

t Impedance: Approximately

Usable Frequency Range: DC to 5 MHz.

Maximum Input Voltage: 30 V (dc + ac peak).

Power Requirements: 100–130 VAC or 200–260 VAC,

50/60 Hz, 38 watts.

Dimensions (H 3 W 3 D):

5.2″ 3 12.8″3 15.7″

(132 3 324 3 398 mm).

Weight: 16.8 lbs (7.6 kg).

Environment:

Within Specified Accuracy: +10° to +35° C, 10–80%

relative humidity.

Full Operation: 0° to +50° C, 10–80% relative

humidity.

Storage: −30° to +70° C, 10–90% relative humidity.

50 kΩ.

ACCESORIES SUPPLIED:

Two Switchable X1/X10 Probes.
Instruction Manual.
AC Line Cord.

6