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Thank´s for your help, I already recived these manual from you
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Thank you for your manual It has the basic things to and i use the Oszi for Longer Time.
THX
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Actually, I was looking for this information for 3 years!...now thanks to you, the manual is on my hands and of great help, cause I understand now where I was doing wrong connections and wires...excellent, I'll be back to you if in need, thank you.
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This manual covers the main equipment features only. While it also includes the procedure for saving and loading from the now long obsolete memory cards it does not mention the how to operate with the optional floppy drive interface so I am still at a loss about how to use this! Note that there is a separate manual covering the MIDI interface and programming via the keyboard, not included in this download. You will also need to get hold of this if you want to use the MIDI interface properly. Basically there is little difference between this manual and the free to download manual for the similar PR60 model.
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Good list of manuals. I found a very rare one and easily get. Should be promptly to download, as we must to wait hours even after confirmed payment.
Model 185B (3) The voltage across staircase capacitor C236 increases, and is applied, through SCANNING switch S203C/D, to unity amplifier V201AQ210, increasing output of the generator by the same amount; this output is the horizontalscan voltage. (4) After comparator blocking oscillator pulse decays, diode CR215 becomes reverse-biased again, and prevents charge on capacitor C236 from leaking off. (5) DENSITY contrbl R255B is in the charge path of staircase capacitor C236. DENSITY permits limited adjustment of charge-path resistance, thereby determining amplitude of staircase steps by controlling amount of charge added to staircase capacitor each time blocking oscillator fires. (6) The output of unity amplifier V201A-Q210 is applied to transformer T203 in such a way that a bootstrap action results. Thus for a given density, the same amount of charge is added to staircase capacitor C236 each time, which results in staircase steps of equal amplitude.
Section IV Paragraph 4-84 (7) When voltage across staircase capacitor C236 reaches about +15 volts, reset blocking oscillator Q209-T204 fires and discharges the capacitor. The staircase is thus reset and starts over again. 4-84. RESET BLOCKING OSCILLATOR. When the staircase voltage exceeds voltage on collector of Q209 (approximately 15 volts), diode CR217 becomes forward-biased, current begins to flow through collector winding of transformer T204, and capacitor C236 effectively becomes the voltage supply for blocking oscillator Q208-T204. The effect of this current flow is transformer-coupled to the base of Q209, which causes blocking oscillator to fire, essentially dropping collector of Q209 to ground. The resulting current-flow through CR217 and QZOQdischarges capacitor (2236, thereby resetting the staircase. It might be pointed out here that the amplitude of the staircase signal remains constant. The height of each individual step can be varied by adjusting R255B a s mentioned in paragraph 4-83, step d (5). The result of varying the height of each step is to change the number of steps per staircase, which changes the number of samples per sweep on the crt.
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Figure 4-10. Staircase Generator 01255-1 4-11
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