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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.
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The manual was properly scanned and perfectly readable. The only small problem is that I couldn't use my dear Ctrl + F to find a word I needed.
Section III Paragraphs 3-18 t o 3-35 3-18. Set the SWEEP WIDTH control about half way t o maximum, turn the CRYSTAL MARKER switch on, and advance the CRYSTAL MARKER AMPLITUDE. Birdie-type m a r k e r s should appear on the oscilloscope. The number of m a r k e r s depends on the m a r k e r separation and the SWEEP WIDTH setting. 3-19. TEST SIGNAL AMPLIFIER.
TYPE 240-A
Model 240A
I
R F OUTPUT-
1
1 5 0 1 - 8 CABLE
1
OSClLLoSCOPE
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1
I
IIF
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1
I
II
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3-20. An audio frequency signal of approximately 1/2 volt applied t o the TEST SIGNAL IN jack should appear at the COMPOSITE SIGNAL OUT jack as approximately 4 volts with the TEST SIGNALAMPLITUDE control turned full on. 3-21. AMPLITUDE MODULATION.
Figure 3-3.
Test Setup Using 501B Output Cable
3-22. Connect a diode detector circuit a c r o s s the terminals of the 501B Output Cable and connect the rectified output to the vertical input of the oscilloscope. Turn the R F LEVEL controls for full output, the function selector knob to CW, and the AM knob to ON. Adjust the internal linear sweep of the oscilloscope f o r about 1 0 0 cps. The rectified 1000 cps amplitude modulation should appear on the oscilloscope. 3-23. R F BLANKING AND FLATNESS.
Figure 3-4. Test Setup Using 501B Output Cable and 509B Output Cable
3-29.
R F OUTPUT.
Use 3-24. the diode detector and oscilloscope connections of paragraph 3-22 with the oscilloscope set t o 20 cps. Turn the CW-SWEEP sweep rate selector knob t o SWEEP and turn the SWEEP WIDTH control up about half way.
3-25. The oscilloscope waveform is shown in Fig. 3-2. The top line (demodulated R F ) and bottom line (base line) should be parallel and flat.
3-30. The R F output is obtained from the terminals of the 501B cable, which presents a source impedance of 25 ohms. The open-circuit voltage, acting in series with 25 ohms, is indicated by the combination of the meter and the RF LEVEL FULL SCALE dial. An additional 25-ohm series r e s i s t o r must be placed between t h e high terminal of the 501B cable and the input to a 50-ohm receiver. 3-31. 3-32. TEST SIGNAL IN. The detected output voltage of the circuit under
test is fed to t h e TEST SIGNAL IN jack.
3-33. SWEEP OUT
3-34. The SWEEP OUT and GND terminals are connected to the horizontal input of the oscilloscope. 3-35. The SWEEP WIDTH control determines the frequency deviation about the indicated center frequency. (See Sweep Range in Table 1-1.) NOTE: The system used for deviating an R F signal about a center frequency depends upon changing magnetic flux acting upon ferrite c o r e s in the R F oscillator coils. The center frequency, as indicated by the frequency dial, is determined by the current in a coil which is magnetically coupled to the ferrite core. Residual magnetism in the f e r r i t e and iron c o r e s can cause the center frequency calibration to be slightly off. Rotating the SWEEP WIDTH control fully clockwise and then counter-clockwise will effect the degaussing of the c o r e s and return the instrument t o proper calibration.
Figure 3-2.
R F Sweep Flatness
3-26. U S I N G THE SWEEP SIGNAL
GENERATOR.
3-27. For use as a conventional CW o r Amplitude Modulated Signal Generator, the only connection required is the 501B R F Output Cable. 3-28. Figures 3-3 and 3-4 show typical arrangements of t e s t equipment for measuring the pass-band of a radio frequency amplifier having its own detector. 3 -4
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