The Tektronix 305 is a dual-function portable instrument combining a 5 MHz, 2-channel analog oscilloscope with a 3½ digit digital multimeter. This single unit delivers real-time waveform capture and precision DC/AC voltage and resistance measurements without field switching. AC or battery operation enables bench and field deployment.
Technical Specifications
-# Oscilloscope
• Bandwidth: 5 MHz
• Channels: 2 analog inputs
• Deflection: 5 mV/div to 10 V/div, variable to 25 V/div
• Input Impedance: 1 MΩ // 47 pF
• Sweep Range: 1 μs/div to 500 ms/div (×10 magnifier extends to 100 ns/div)
• CRT: 10 × 8 division graticule, 6.32 mm pitch, P31 phosphor, 2 kV acceleration
• Rise Time: 70 ns
• Operating Modes: Ch1, Ch2, Chop, Alt, Add, Inv Ch2, X-Y
• External Trigger Input: supported
• External Blanking: yes (deflection method, 100 kHz max)
-# Digital Multimeter
• Display: 3½ digit
• DC Voltage: 2/20/200/1000 V ±0.1%
• AC Voltage: 2/20/200/700 V ±0.5% (40–500 Hz range)
• Resistance: 2/20/200/2000 kΩ ±0.6%
-# Power System
• AC Input: 90–132 V or 180–250 V, 48–440 Hz
• DC Input: 9–32 V
• Internal NiCd Battery: 1.6 h (scope+DMM), 2 h (scope only), 10 h (DMM only)
• Charge Time: 16 hours
• Power Draw: ≤17 W
– Key Features
• Portable 4.8 kg design (37.1 cm × 23.6 cm × 11.2 cm)
• Dual-mode operation supports simultaneous or independent scope and meter use
• Extended timebase magnification for nanosecond-level pulse analysis
• Selectable channel processing and waveform arithmetic
• Low input capacitance minimizes circuit loading during measurements
– Typical Applications
Field electronics troubleshooting, analog circuit characterization, power supply testing, signal integrity verification, educational lab use.
– Compatibility & Integration
External trigger and blanking inputs enable integration with function generators and test automation systems. Dual-channel architecture supports differential measurements and multi-point circuit analysis.
