Tuesday, April 24, 2012

ATTEN AT7328 dual channel 20MHz analog Oscilloscope

ATTEN AT7328 dual channel 20MHz analog Oscilloscope



specificatons:

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)
> 1000:1 at 50 MHz; > 30:1 at 20MHz; > 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
0.2μSec-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