Duncan Instruments Canada Ltd
Duncan Instruments Canada Ltd.
Electronic Measurement Solutions since 1968
ISO 9001


PB-503 Bench-Top Workstation

  • Limited lifetime warranty on all breadboarding sockets & 3-year warranty on all parts and workmanship.
  • Ideal for analog, digital and microprocessor circuits
  • New high & low buffered logic indicators
  • 8 channel logic monitor
  • New 8 selectable logic switches
  • Function Generator with continuously variable sine, square and triangle waveforms and TTL pulses
  • Triple output power supply offers fixed 5 VDC supply plus two variable outputs: ▒1.3 to ▒15VDC
  • Two Digital Pulsers
  • Audio experimentation speaker
  • New removable breadboard area and optional additional breadboard socket plates
  • Multiple features in one complete test instrument saves hundreds of dollars necessary for individual units

Technical Specification:


3-wire AC line input (117V, 60 Hz typical) with power-on indicator. Both Models are available in 220-240VAC@50Hz Fixed DC output: +5V@1.0A, ripple <5mV. Variable DC output: +1.3 V to +15V@0.5A, ripple <5mV. Variable DC output: -1.3V to -15V @ 0.5A, ripple <5mV.


Frequency Range: 0.1 Hz to 100 kHz in six ranges.Output voltage: 0 to ▒10V (20Vp-p). Output Impedance: 600 ohms (except TTL). Output current: 10mA maximum, short circuit protected. Output waveforms: sine, square, triangle, TTL. Sine wave: distortion <3% (10Hz to 100kHz). TTL pulse: rise and fall time <25 nS. drive to 10 TTL loads. Square wave: rise and fall time <1.5ÁS


8 LED's, active high, 1.4 volt (nominal) threshold, inputs protected to ▒20 volts.


Two pushbutton-operated, open-collector output pulsers, each with one normally-open, one normally closed output. Each output can sink up to 250 mA.

POTENTIOMETERS: One 1 K ohm, one 10 K ohm, all leads available and uncommitted.

BNC CONNECTORS: Two BNC connectors, pin available and uncommitted, shell connected to ground.


Two SPDT slide switches, all leads available and uncommitted. 8-pole DIP switch: one side of all eight switches connected and switchable to +5V or ground, other side of all eight switches separate, available, and uncommitted.

SPEAKER: 0.25W, 8 ohms


Three UBS-100 sockets with 840 tie-points each for a total of 2520 uncommitted tie-points. Two QT-59B Bus strips internally connected to power and ground. Fifty tie-points each for +5V, +V,=15 V and ground.

ENCLOSURE: High impact molded case.

WEIGHT: 7 lbs

OVERALL DIMENSIONS: 6.5" H x 16" W x 11.5" D

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