475

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Tektronix 475
Portable 200 MHz dual-trace scope
Tektronix 475

Produced from 1972 to 1983

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 475 is a portable dual-trace oscilloscope with dual time-bases similar to the 465, but with 200 MHz bandwidth and a maximum vertical sensitivity of 2 mV/Div. It is all solid-state except for the CRT. It was introduced in November 1972.

The military variant is called OS-261 C(v)1/0, which has a DC/DC converter (12/24V input) on board.

A revised version, the 475A (introduced in 1977), has 250 MHz bandwidth and a maximum vertical sensitivity of 5 mV/Div.

The 1106 is a battery pack for the 475.

The optional DM44 multimeter attaches to the top of the instrument.

Specifications

Bandwidth 200 MHz (475), AC cutoff 10 Hz, switchable BW limit 20 MHz
Rise time 1.75  ns (475)
Deflection 2 mV/Div to 5 V/Div, 1-2-5
Cascaded mode 400 μV/Div, 50 MHz with CH1 input connected to CH2 VERT SIG OUT
Time base 10 ns/Div to 500 ms/Div, 1-2-5, and ×10 magnifier
Input impedance 1 MΩ // 20 pF
Triggering 0.3 Div (int) or 50 mV (ext) to 40 MHz, increasing to 1.5 Div/250 mV at 200 MHz; AC coupling >60 Hz; LF REJ >50 kHz, HF REJ <50 kHz
X bandwidth 3 MHz
Z axis input 5 Vp-p, 50 MHz
Calibrator 1 kHz, 30 mA / 300 mV square wave
Outputs CH2 Vert Signal Out, 20 mV/Div into 1 MΩ or 10 mV/Div into 50 Ω; A and B +GATE OUT, +5 V; Probe power jack
CRT 8 × 10 cm², P31 phosphor (P11 opt.), 154-0677-00
Power 110, 115, 120, 220, 230 or 240  VAC ±10%, 48-440 Hz, max. 100 W

Internals

The 475 uses a number of Tek-made integrated circuits, including the 155-0032-01 input preamplifier, 155-0085-00 input amplifier, 155-0078-00 vertical amplifier, 155-0091-00 channel switch, 155-0082-00 vertical output amplifier, and 155-0049-00 sweep control.

Links

Common Problems

Pictures

475M

Custom ICs used in the 475

Page Class Manufacturer Model Part nos Description Designers Used in
155-0032-00 Monolithic integrated circuit Tektronix M55D 155-0032-00 differential amplifier Roy Hayes 335 465 7A12 475 FG504
155-0049-00 Monolithic integrated circuit Tektronix M079G 155-0049-02 sweep control with lockout Bill DeVey 335 464 465 466 475 485 4851 4852 5B31 5B40 5B52 5B42 5B44 7B53A 7B80 7B85 7B87 7B92A 7B90P 7B10 7B15 SC502 7B42N
155-0078-00 Monolithic integrated circuit Tektronix M084 155-0078-xx 155-0273-00 155-0274-00 broadband vertical amplifier John Addis 475 485 7834 7844 7854 7904 R7903 7912AD 7912HB 7A16A 7A16P 7A24 7A26 7A42 067-0587-01 AM503 PG502 PG508 DC510
155-0085-00 Hybrid integrated circuit Tektronix H136 155-0085-00 155-0085-01 input amplifier 475
155-0091-00 Monolithic integrated circuit Tektronix M095A 155-0091-00 channel switch / HF amplifier Einar Traa Jim Woo 475 475A
155-0217-00 Monolithic integrated circuit Tektronix 155-0217-00 155-0217-00 transconductance amplifier 335 475 FG504

Custom ICs used in the 475A

Page Class Manufacturer Model Part nos Description Designers Used in
155-0082-00 Monolithic integrated circuit Tektronix 155-0082-00 155-0082-00 vertical output amplifier 475A
155-0091-00 Monolithic integrated circuit Tektronix M095A 155-0091-00 channel switch / HF amplifier Einar Traa Jim Woo 475 475A
155-0168-00 Hybrid integrated circuit Tektronix H126 155-0168-00 amplifier Einar Traa 475A