25MHz Four Trace Oscilloscope  Model 3802
  
     
 
Features
 Model 3802
  • Line Trigger
  • ALT Triggering
  • C.T. Facility
  • Elegant
  • DC to 25MHz Bandwidth
  • 1mV/div Sensitivity on Both Channels
  • CH1 & CH2 Independent Channels
  • CH1 Signal Output
  • Algebraic Addition and Subtraction
  • X-Y Operation
  • 20ns/div to 0.2s/div Time Base
  • ALT MAG. Trace - Max. 4 Traces
  • Scale Illumination
  • Z Modulation
  • 8 x 10 cm Display Internal Graticule
  • Auto Focus
  • TV Triggering Frame (V) & Line (H)
Technical Specifications
VERTICAL DEFLECTION (Y)
Deflection Coefficient (CH1 & CH2) 1mV/div to 5V/div. 5mV/div to 5V/div in 10 calibrated steps in 1-2-5 sequence. x5 Magnification increases the sensitivity to 1mV/div to 1V/div.
Accuracy x1 : ±3%, x5 : ±5%.
Variable 1 / 2.5 times uncalibrated continuously variable control extends the Deflection Coefficient to more than 12.5V/div.
Bandwidth x1 : DC to 20MHz (-3dB), dc coupled.
10Hz to 20MHz (-3dB), ac coupled.
x5 : DC to 7MHz (dc coupled)
10Hz to 7MHz (ac coupled).
Rise Time 14ns or less.
Display Modes CH1, CH2, DUAL (CH1, CH2 ALT/CHOP), Algebraic ADD and SUBTRACT, CH2 INVT & X-Y (CH1 as X, CH2 as Y).
Input Impedance 1M ohms // 25pF approx.
Maximum Input Voltage 300 Volts (dc + peak ac).
Internal Trigger Signal CH1, CH2 or Alternate.
CH1 SIG OUT
Output Voltage Minimum 20mV for 1 div of CH1 input signal.
Output Impedance 50 ohms (approx.).
Bandwidth 50Hz to 5MHz.
TIME BASE
Sweep Speed 20 Calibrated steps. 0.1µs/div to 0.2s/div in 1, 2 & 5 sequence.
Sweep Magnifier x5 Magnification increases the fastest sweep upto 20ns/div.
Accuracy ±3%.
Variable Uncalibrated continuously variable control between steps, extends slowest sweep speed to 0.5s/div (approx.).
ALT MAG Trace x5 magnified sweep is displayed along with normal sweep.
TRIGGER SYSTEM
Triggering Mode AUTO, NORM, TV-V, TV-H.
Source INT (CH1 or CH2) / CH2 / LINE / EXT.
Slope Positive or Negative.
Coupling ac coupling.
Trigger Sensitivity  
Internal Auto : 1.5 div - 20Hz to 25MHz.
Normal : 1.5 div - 10Hz to 25MHz.
Lock : 2.0 div - 50Hz to 20MHz.
Alt : >3div - 50Hz to 25MHz.
External Auto 0.3V p-p - 20Hz to 20MHz.
Normal 0.3V p-p - 10Hz to 20MHz.
Lock 0.3V - 50Hz to 20MHz.
HORIZONTAL DEFLECTION
Deflection Coefficient Same as CH1.
Bandwidth DC - 1MHz (-3dB).
Input Impedance 1M ohms & 25pF approx.
Phase Difference <3º (DC - 50KHz).
COMPONENT TESTER Component Tester allows V.I. Characteristics of a Device Under Test (D.U.T.).
Test Voltage 9V rms (No Load).
Test Current 2mA when shorted.
GENERAL INFORMATION
Cathode Ray Tube 140mm Rectangular screen, Internal Graticule, 8 x 10 cm, P31 phosphor.
Accelerating potential : 2kV.
Z-Modulation ±5V p-p signal upto 2MHz modulates at normal intensity.
Calibrator Provides 0.5V ±2%, 1KHz ±2% square-wave output for probe compensation.
Power Requirement 220V AC ±10%, 50Hz ±5%, 35VA (max.).
Dimensions 140 (H) x 335 (W) x 375 (D) mm approx.
Weight 7.2 Kgs. approx.
Accessories Instruction Manual, 2 High impedance switch probe with x1 or x10 attenuation, Mains Cord.
Environmental Specifications Operating conditions.
Normal : 10ºC to 35ºC, RH 45% to 85%.
Operational : 0ºC to 40ºC, RH 35% to 90%.
 

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