С1-122

Manuals – Specifications – Links – Pictures

The С1-122 (Cyrillic; latin transliteration S1-122) is a general-purpose 100 MHz non-storage, large screen scope made by the Soviet Research and Development Institute of Radio Measuring Instruments in Vilnius (present-day Lithuania). It takes two vertical and one horizontal plug-in. It replaced the earlier С1-91 that did not have sufficient power supply capacity for the newer plug-ins. 11092 units were produced, at an average price of 5000-9000 rubles.

It is similar to the Tektronix 7603 though with a number of significant differences:

• it is noticeably larger
• the channel switching controls are electronic, not mechanical, and contain indicator LEDs
• the calibrator has different output voltages and frequencies
• there are no rear-panel connections for sweep gate or Z axis
• the probe power connectors are a Soviet type
• there is a mercury-column type hours counter on the rear

The readout is different from its predecessors, the С1-91 and С1-115. Instead of their vector-type character generator, it uses a dot matrix format.

The example in the photographs is labelled in German, but ones labelled in Russian also exist.

Key Specifications

Bandwidth	100 MHz
Vertical modes	Left / Alt / Add / Chop / Right
Trigger Source	Left / Vert Mode / Right
CRT	17LO7I
Outputs	Probe power
Power	220 VAC, max. 350 W
Calibrator	0.03 V, 0.3 V, 3 V at 1 kHz, 1 V at 1 MHz
Weight	17 kg

Pictures

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  S1-122 internals

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  S1-122 plugin motherboard

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  С1-122 and Я4С-122 development team (mid-1980s)