Specifications
- Measuring ranges
- input A 25 mV rms up to 50 MHz, 50 mV rms at 50–120 MHz
- Frequency range
- 10 Hz – 120 MHz (input A), 100–500 MHz (input B)
- Accuracy
- thermostatted 10 MHz time base, 1 × 10⁻⁸ / 24 h
- Input impedance
- 1 MΩ ∥ 35 pF (A), 50 Ω (B)
- Display
- 8 digits, LED
- Outputs / interface
- IEC 625 bus
- Construction
- Z80 microprocessor
- Power supply
- 220 V ±10%, 50/60 Hz
Description
The E0209 is a digital programmable universal counter, made by IEMI in Bucharest and designed at the ICE research institute [1].
ICE’s laboratory for electronic instruments for measuring electrical quantities designed all the institute’s generations of oscilloscopes, voltmeters, multimeters, signal generators, frequency meters, logic analysers, RLC bridges and stabilised AC power supplies; they went into production at IEMI or in ICE’s own microproduction workshop, and equipped industrial laboratories and production lines as well as teaching and research laboratories [1]. In the 1970s and 1980s about half of the components of measuring instruments were imported; after 1980 about three quarters were Romanian [1].
It is a programmable autoranging universal counter with eight LED digits and an IEC 625 bus interface; it was made after 1985 [2].
Annex III.2.7 says it was built around a Z80 microprocessor, with two channels, 10 Hz – 120 MHz and 100–500 MHz, and was used in radar, radio communications, integrated circuit test systems, laser communications, ballistics and other applications needing high-resolution measurements at high frequencies [3].
Gallery
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Schematics
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Documents
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References
- [1]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, section II.4.1 „Laborator aparate electronice pentru măsurarea mărimilor electrice”, pp. 109–115
- [2]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, sections III.2 „Producția IEMI” and III.3 „Comentarii tehnico-economice”, pp. 302–317, and annex III.2.3 „Producția IEMI – aparate electronice de măsură și industriale”, pp. 383–386
- [3]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, annex III.2.7 „Frecvențmetre”, pp. 614–617