Time Base 3B4

Tektronix; Portland, OR

  • Year
  • 1964
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 231766

 Technical Specifications

  • Number of Tubes
  • 4
  • Number of Transistors
  • 20
  • Semiconductors
  • Main principle
  • none
  • Wave bands
  • - without
  • Power type and voltage
  • Powered by external power supply or a main unit.
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Time Base 3B4 - Tektronix; Portland, OR
  • Shape
  • Chassis only or for «building in»
  • Dimensions (WHD)
  • 4.25 x 6.5 x 14.5 inch / 108 x 165 x 368 mm
  • Notes
  • The Type 3B4 Time Base plug-in unit is designed to be used primarily with the Tektronix Type 561A Oscilloscope system; however, It can also be used with the other 560-Series systems that use 3B-Series plug-in units such as the Type 564 and Type 567. As part of an oscilloscope system, the Type 3B4 is used as an accurate time base generator or as a calibrated amplifier for externally generated deflection signals.
    When used with the 567 or RM567, the 3B4 provides a time-base, but does not activate the digital readout circuitry. In the 565 or RM565, the 3B4 provides a vertical time-base for raster applications but does not provide retrace blanking.

    Sweep

    TIME/DIV  Switch
    0.2 µsec/div to 5 sec/div in 23 steps, 1, 2, 5 sequence. The calibration accuracy (unmagnified) is ±3% from 0.2 µsec/div to 2 sec/div; ±5% at 5 sec/div.

    VARIABLE Control
    Uncalibrated variable time/div control. Multiplies the sweep time/div of any step of the TIME/DIV switch by a factor variable from 1 to >2.5.


    POSITION Controls
    Coarse horizontal positioning to position any portion of the trace to the center of the crt. The FINE control has a range of about 2 minor divisions.


    MAGNIFIER Control
    Provides direct readout magnification of the sweep (up to 50X). The magnifier also provides the 0.05 and 0.1 µsec/div sweep rates. Magnified sweep accuracy, ±5% (exception: 5 sec/div). Magnified sweep registration, ±1 minor division.

    + GATE OUT Connector
    Provides a +20-volt (±15%) output pulse during sweep time.

    Sweep Length
    10.5 ±0.3 major division.


    Sweep Amplifier (when used as an external horizontal amplifier)

    HORIZONTAL VOLTS/DIV Switch
    Calibrated volts/div steps of 0.2, 0.5, 1, 2, and 5 volts/div. Accuracy ±3% when calibrated to match the oscilloscope in which used. The amplifier is dc coupled to the EXT HORIZ IN connector.

    VARIABLE Control
    Multiplies volts/div of any step by a factor  variable from 1 to >2.5.

    EXT HORIZ IN Connector
    Input R and C is typically 1 megΩ shunted by 40 pf.

    Frequency Response
    Dc to 400 kc. Response <30% down at  400 kc with the VARIABLE control set to CALIB position.

    Maximum Input Voltage
    ±20 volts dc, or 20 volts peak ac.

    Construction Aluminum-alloy chassis with chrome-plated
    side rails. Front panel is photo-etched and anodized.

  • Net weight (2.2 lb = 1 kg)
  • 4.5 lb (4 lb 8 oz) / 2.043 kg
  • Price in first year of sale
  • 400.00 USD
  • Source of data
  • -- Original-techn. papers.
  • Author
  • Model page created by Pius Steiner. See "Data change" for further contributors.

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