●示波管 Hitach 15OBNB31
Screen type : P31 phosphor standard
DC-coupled, positive—going signal decreases
Signal causes noticeable modulation at normal intensity: DC to 3.5MHz.
Input impedance: Approximately 15 kΩ
Maximum input voltage: 20 V (DC + AC peak)
●VERTICAL DEFLECTION (2 Identical Channels)
Bandwidth and Rise time
DC to at least 100MHz and rise time 3.5ns or less. DC to at least 5MHz and rise time 7Ons c less at magnifier extends.
Lower -3dB point, AC coupling 10Hz or less.
5mV/div to 5V/div in 10 calibrated steps, 1-2-5 sequence. Uncalibrated continuous control extends deflection factor to at least 12.5 Volt per division in the 5 Volts/div position. x10 magnifier increases sensitivity of each deflection factor setting to 500V/div.
xl ±2% (+10°C to +35°C) ±4% (0°C to +50°C)
x10 ±3% (+10°C to +35°C) ±5% (0°C to +50°C)
Additional error for magnifier ±1% Display modes: CH1, CH2 (normal or invert), Alternate, Chopped (250kHz rate), Added
Input Impedance: 1M ohm ±1.5% in naraHel with 2.8nF ±3PF
Maximum Input Voltage: 250V (DC + AC peak) or 500Vp-p AC at 1kHz or less
Input coupling: AC-GND-DC
Delay Line: Permits viewing leading edge of display waveform.
Four-trace Display (TRIG VIEW)
Display simultaneously channel 1, channel 2, channel 3 (A EXT TRIG signal), channel 4 (B EXT TRIG signal).
The deflection factor of channel 3 and channel 4 is approx. 200mV/DIV.
• Sensitivity INT: 1/1 ± 30% of screen area
EXT: 0.2 V/DIV ± 30%
• Frequency band EXT: DC to 70 MHz (-3dB)
• Position CH3: Horizontal 100% graticule line of screen ± 1 div (trigger level knob is set at the center). CH4: Horizontal 0% graticule line of screen ± 1 div.
Time Base A
20ns/DIV to 0.5s/DIV in 23 calibrated steps, 1-2-5 sequence. Uncalibrated continuous control extends deflection factor to at least 1.25 seconds per division in the 0.5 s/DIV position. x10 mag extends fastest sweep rate to 2ns/DIV.
Time Base B
20ns/DIV to 50ms/DIV in 20 calibrated steps 1-2-5 sequence. x10 mag extends fastest sweep rate to 2ns/DIV.
Accuracy: ±2% (+10°C to +35°C); ±4% (0°C to +50°C)
Additional error for magnifier +2%.
A sweep variable: Present
Horizontal Display Modes: A only, A intensified, Alternate, B delayed, X-Y operation.
Delayed sweep position adjustment: 1 div or less - 10 div or more
Delay Time Jitter: Better than 1:20,000
●TRIGGERING A AND B
A Trigger Modes: Automatic, Normal, Single sweep, TV (TV-H or TV-V)
A Trigger Hold-off: Adjustable control permits a stable presentation of repetitive complicated waveform.
A Trigger Source: Internal (Ch1, Ch2), Line, External, External ÷10
A Trigger Slope: + or –
TV Sync Polarity: TV(+) or TV(-)
Triggering level variable range: For both A and B.
Internal;±4div or more
External; approximately ±1V
External÷10; approximately ±10V
Triggering sensiti- For both A and B. However, vity and frequency ( ) is only for B
Frequency Internal External External÷10
DC(30Hz)-10MHz 0.3div 50mV 500mV
10MHz -100MHz 1.5div 150mV 1.5V
TV-V sensitivity: SYNC section less than 0. 7div or 200mV
AUTO low band : Approximately 30Hz (When Time Base A is 2Ons/DIV to 2ms/DIV)
A Trigger Coupling
AC : 30Hz to full bandwidth
HF REJ: attenuates signals below approx 4kHz
LF REJ: attenuates signals above approx 4kHz
DC : 0 to full bandwidth
A External Trigger Input Impedance
1M ohm +20% in parallel with 28PF +6PF (However setting HF REJ and LF REJ are not included.)
Maximum Input Voltage: 250V (DC + AC peak at 1kHz or less); 500Vp-p AC at 1kHz or less
B Trigger Modes and Source: Automatic, Normal (Ch1, Ch2, External)
B Trigger Slope: ＋ or －
Trigger Coupling: AC only; 30Hz to full bandwidth
●X-Y OPERATION (CH1; Horiz. CR2; Vert.)
Same as vertical deflection
Y: ±2% (+10°C to +35°C), ±4% (0°C to +50°C)
X: ±5% (+10°C to +35°C), ±7% (0°C to +50°C)
X-Bandwidth: DC to at least 2MHz
Phase Error: 3°or less from DC to 2MHz