475: Difference between revisions

Revision as of 01:21, 19 July 2017

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Portable 200 MHz dual-trace scope Tektronix 475A Produced from 1972 to 1983 Manuals Tektronix 475 Manual (65MB file, ok quality, PDF) Tektronix 475 Manual (108MB file, good quality, PDF) Tektronix 475A Schematics (PDF) Tektronix 475A Marketing Sales Release (PDF) 475A manual needed (no good quality free scan available) (All manuals in PDF format unless noted otherwise)

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.

A revised version, the 475A, 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.

Key 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 V_p-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
CRT	8 × 10 cm², P31 phosphor (P11 opt.)
Power	110, 115, 120, 220, 230 or 240 V_AC ±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

The New Look in Portables, in Tekscope Vol. 4 No. 5, 1972
Tek 475 / Tek 475A @ amplifier.cd
Tek 475A in operation @ YouTube

Pictures

Tektronix 475A
Tektronix 475A

@@ Line 25: / Line 25: @@
 {{Spec | Deflection | 2 mV/Div to 5 V/Div, 1-2-5 }}
 {{Spec | Cascaded mode | 400 μV/Div, 50 MHz with CH1 input connected to CH2 VERT SIG OUT }}
-{{Spec | Time base | 10 ns/Div to 500 ms/Div, 1-2-5, and ×10 magnifier }}
+{{Spec | Time base | 10 ns/Div to 500 ms/Div, 1-2-5, and ×10 magnifier }}
-{{Spec | Input impedance | 1 MΩ // 20 pF }}
+{{Spec | Input impedance | 1 MΩ // 20 pF }}
 {{Spec | 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 }}
-{{Spec | X bandwidth | 3 MHz }}
+{{Spec | X bandwidth | 3 MHz }}
-{{Spec | Z axis input | 5 V<sub>p-p</sub>, 50 MHz }}
+{{Spec | Z axis input | 5 V<sub>p-p</sub>, 50 MHz }}
 {{Spec | Calibrator | 1 kHz, 30 mA / 300 mV square wave }}
+{{Spec | 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 }}
+{{Spec | CRT | 8 × 10 cm², P31 phosphor (P11 opt.)  }}
+{{Spec | Power | 110, 115, 120, 220, 230 or 240  V<sub>AC</sub> ±10%, 48-440 Hz, max. 100 W }}
 {{EndSpecs}}