BK 2121 Specifications BK 2121

BK 2121 Specifications

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BK 2121 Specifications

Specifications

VERTICAL AMPLIFIERS (CH 1 and CH 2)

Sensitivity

5 mV/div to 5 V/div, 1 mV/div to 1 V/div at X5

Attenuator

10 steps in 1-2-5 sequence. Vernier control provides full adjustment between steps

Accuracy

+-3%, +-5% at X5

Input Resistance

1 M +- 2%

Input Capacitance

25 pF +- 10pF

Frequency Response

5 mV to 5 V/div: DC to 30 MHz (-3 dB). X5: DC to 10 MHz (-3 dB)

Rise Time

12 ns (Overshoot <= 5%)

Operating Modes

CH 1: CH 1, single trace
CH 2: CH 2, single trace
ALT: dual trace, alternating
CHOP: dual trace, chopped
ADD: algebraic sum of CH 1 + CH 2

Polarity Reversal

CH 2 only

Maximum Input Voltage

400 V (DC + AC peak)

SWEEP SYSTEM

Sweep Speed

0.1 us/div to 2s/div in 1-2-5 sequence, 23 steps. Vernier control provides fully adjustable sweep time between steps

Accuracy

+-3%

Sweep Magnification

10x

TRIGGERING

Triggering Modes

AUTO (free run) or NORM, TV-V, TV-H

Trigger Source

CH 1, CH 2, ALT, EXT, LINE

Maximum External Trigger Voltage

300 V (DC + AC peak)

Trigger Coupling

AC 30 Hz to 30 MHz

TV H

Used for triggering from horizontal sync pulses

TV V

Used for triggering from vertical sync pulses

TRIGGER SENSITIVITY

Coupling	Bandwidth	Int	Ext
Auto	100 Hz - 30 MHz	1.5 div.	100 mV
Norm	DC to 30 MHz	1.5 div	100 mV
TV V	20 Hz-1 kHz	5 div	100 mV
TV H	1 kHz-100 kHz	.5 div	100 mV

HORIZONTAL AMPLIFIER (Input through channel 2 input)

X-Y Mode

Switch selectable using X-Y switch. CH 1: X axis

CH 2

Y axis

Sensitivity

Same as vertical channel 1

Input Impedance

Same as vertical channel 1

Frequency Response

DC to 1 MHz typical (-3 dB)

X-Y Phase Difference

Approximately 3" at 50 kHz

Maximum Input Voltage

Same as vertical channel 1

CRT

Type

Rectangular with internal graticule

Display Area

8x10 div (1 div = 1 cm)

Accelerating Voltage

2 kV

Phosphor

P31

Trace Rotation

Electrical, front panel adjustable

Display Resolution

Auto select from 0.001Hz to 1KHz depending on the frequency

Max Counter Range

0.1Hz to 50MHz

Max External Voltage

300V dc + ac peak

Accuracy

+0.01% + 1 digit or 1/99999 + 1 digit

Time Base

18,432MHz + 10ppm (230 C +/- 50 C)

Sensitivity

Electrical, front panel adjustable

Sensitivity INT

2Hz ~ 40MHz >= 1 Div
1Hz ~ 45MHz >= 2 Div
0.2Hz ~ 50MHz >= 3 Div

Sensitivity EXT

10Hz ~ 50MHz >= 200m Vrms
1Hz ~ 50MHz >= 400m Vrms

Other Specifications

Calibrating Voltage

1 kHz (+-10%) Positive Square Wave, 2 V p-p (+-3%)

ENVIRONMENT

Within Specified Accuracy

50 0 to 95 0 F (10 0 to 35 0 C), <= 85% RH

Full Operation

32 0 to 104 0 F (0 0 to 40 0 C), <=85% RH

Storage

-4 0 to 158 0 F (-20 0 to +70 0 C)

Power Requirements

100/120/220/240 VAC +- 10%, 50/60 Hz, approximately 40 W

Dimensions (WxHxD)

7x14.5x17.25" (180 x 370 x 440 mm)

Weight

Approximately 17.2 lbs. (7.8 kg)

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