AT7328 Series Dual Channel Oscilloscope,
Maximum sensibility is 5mV/div, maximum sweep speed is 0.2_s/div, and can be expanded ten times to 20ns/div.
This item apply 6in with red graticule rectangular CRT, with stable and reliable performance.
 

FEATURES

• 20MHz Dual Channel
• High Sensitivity 1Mv/DIV
• 5mV/div Sensitivity on Both Channels
• CH1 & CH2 Independent Channels
• CH1 Signal Output
• Two waveforms in different frequency can be observed via alternative trigger function
• High-speed sweep
• Algebraic Addition and Subtraction
• X-Y Operation
• 0.2ìs/div to 0.5s/div Time Base(Uncal upto 20ns)
• Z Modulation TTL Level
• 8 x 10 cm Display Internal Graticule
• TV signal synchronous function, TV Triggering Frame (V) & Line (H)
• Line Trigger
• ALT Triggering

TECHNICAL SPECIFICATIONS

VERTICAL AXIS
Sensitivity 5mV~5V/DIV, 10 steps in 1-2-5 sequence (X5 MAG: 1mV/DIV)

Sensitivity accuracy ≤3% (×5MAG: ≤5%)

Vernier vertical sensitivity continuously variable to 1/2.5 or less of panel-indicated value

Frequency bandwidth DC-20MHz (×5MAG:DC-7MHz)   /  DC-40MHz (×5MAG:DC-15MHz)

AC coupling Low limit frequency 10Hz. (With reference to 100KHz,8DIV.Frequency response with-3dB)

Rise time Approx.17.5Ns (×5MAG:Approx.50Ns) / 9.5nS (X5MAG: Approx.25nS)

Input impedance Approx. 1M ohm//Approx. 25pF

Square wave characteristics

Overshoot: ≤5%(At 10Mv/DIV range) other distortions and other ranges: 5% added to the above value

DC balance shift: 5mV~5V/DIV; ±0.5 DIV, 1mV~2mV/DIV±2.0DIV

Linearity: ﹤ ±0.1DIV of amplitude change when waveform of 2 DIV at graticule center is moved vertically.

Vertical modes CH1 single channel. /  CH2 single channel

DUAL  CH1 and CH2 are displayed ALT or CHOP selectable at any sweep rate.

ADD CH1+CH2 algebraic addition

Chopping repetition frequency Approx.250KHz

Input coupling AC, GND , DC

Maximum input voltage 300V peak (AC: frequency 1KHz or lower) When set probe switch at 1:1, the maximum effective readout is 40Vp p(14Vrms at sine wave); or set probe switch at 10:1, the maximum effective readout is 400Vpp(140Vrms at sine wave)

Common mode rejection ratio
50:1 or better at 50KHz sinusoidal wave.(when sensitivities of CH1 and CH2 are set equally)

Isolation between channels (at 5Mv/DIV range)
 ï¼Âž 1000:1 at 50 MHz; ï¼Âž 30:1 at 20MHz; ï¼Âž 30:1 at 40MHz

CH1 signal output  At least 20Mv/DIV into a 50 ohm termination, Bandwidth is 50Hz to at least 5MHz.

CH2 INV BAL  Balanced point variation: ≤1DIV(Reference at center graticule)

HORIZONTAL AXIS

Sweep time 0.2ìSec-0.5Sec/DIV,20Steps in 1-2-5sequence

Sweep time accuracy ±3%

Vernier sweep time control ≤1/2.5 of panel-indicated value

Sweep magnification 10 times

×10MAG sweep time accuracy ±5%(20nsec-50nsec are uncalibrated)

Linearity ±3%,×10MAG: ±5%(20ns and 50ns are uncalibrated)

Position shift caused by×10MAG Within 2 DIV, at CRT screen center
 

TRIGGERING

Triggering source CH1, CH2, LINE, EXT

Coupling AC:20Hz to full bandwidth

Slope +/-

Sensitivity 20Hz-2MHz: 1.0 DIV, TRIG-ALT: 2DIV,EXT:200Mv; 2MHz-20MHz: 1.5DIV; 20MHz or higher: 2.0DIV

TRIG-ALT: 3DIV,EXT:800mv

TV Sync pulse more than 1 DIV (EXT:1V)

Triggering modes AUTO; NORM; TV-V; TV-H.

(Both TV-V and TV-H synchronize only when the synchronizing signal is negative)

 Input impedance Approx:1M ohm//approx.25pF

Max input voltage

300V(DC+AC peak), AC: frequency not higher than 1KHz

 X-Y MODE

Sensitivity Same as vertical axis.(X-axis:CH1 input signal,Y-axis:CH2 input signal)

Frequency bandwidth DC to at least 500KHz

X-Y phase difference ≤3°at DC-50KHz

Z AXIS

Sensitivity 5Vp-p (positive-going signal decreases intensity)

Frequency bandwidth DC-2MHz

Input resistance Approx. 47k ohm

Maximum input voltage 30V (DC+AC peak, AC frequency ≤1KHz)

CALIBRATION VOLTAGE

Waveform positive-going square wave

Frequency  Approx,1KHz

Output voltage 2Vp-p ±2%

Output impedance Approx,1K ohm

 CRT

Type 6-inch rectangular type, internal graticule

Phosphor P31

Acceleration voltage approx 2KV

Effective screen size 8x10 DIV(1 DIV=10mm(0.39in))

Graticule Internal

Trace rotation provided  

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