Subject to change without notice
42
Set input coupling CH I to GD.
Remove signal cable from input CH I and connect it to TRIG.INP. socket. Do not change
generator settings.
Now the Trigger-LED should be ON again.
(41) Video Trigger Check.
Set CH I input coupling switch to DC.
Connect video signal with positiv sync. pulses to input CH I.
Adjust input attenuator switch CH I for 1 div display amplitude of video signal.
Set time base to 5ms/div ( time base
≥
1ms/div = frame triggering).
Set trigger coupling switch to TV.
Check that trigger starts with vertical sync. pulses.
Now approx. 2.5 frames should be visible.
Change polarity of video signal.
Press SLOPE pushbutton (in!).
Again approx. 2.5 frames should be displayed triggered.
Set time base to 20µs/div ( time base range 0.5ms/div - 0.1µs/div = line triggering).
Recheck trigger SLOPE pushbutton procedure, using video signal with polarity change.
Note:
Note:
Note:
Note:
Note:
Invert pushbutton does not affect trigger polarity.
Summary of Contents for HM 303-4
Page 3: ...Subject to change without notice 2...
Page 5: ...Subject to change without notice 4 Y Preamplifier CH I YP Board...
Page 6: ...Subject to change without notice 5 Y Preamplifier CH II YP Board...
Page 7: ...Subject to change without notice 6 Y Intermediate Amplifier and Trigger Amplifier YP Board...
Page 8: ...Subject to change without notice 7 YPA Board Top side...
Page 9: ...Subject to change without notice 8 YPA Board Top side...
Page 10: ...Subject to change without notice 9 XY Amplifier YF Amplifier OS Circuit...
Page 11: ...Subject to change without notice 10 XY Board Top side...
Page 12: ...Subject to change without notice 11 XY Board Top side...
Page 13: ...Subject to change without notice 12 Sync Amplifier...
Page 14: ...Subject to change without notice 13 Time base...
Page 15: ...Subject to change without notice 14 Sweep Generator...
Page 16: ...Subject to change without notice 15 TB Board...
Page 17: ...Subject to change without notice 16 CRT Board...
Page 18: ...Subject to change without notice 17 CRT Board Top and Bottom side...
Page 20: ...Subject to change without notice 19 PS Board Top side...
Page 21: ...Subject to change without notice 20 PS Board Bottom side...
Page 22: ...Subject to change without notice 21 Component tester Calibrator...
Page 23: ...Subject to change without notice 22 CCT Board Top and Bottom side...
Page 24: ...Subject to change without notice 23 Front control board...
Page 25: ...Subject to change without notice 24 Front Control board Top and Bottomside...
Page 26: ...Subject to change without notice 25 Adjustment Procedure...
Page 31: ...Subject to change without notice 30 10 12 7 11 9 8 YPA Board PS Board...
Page 35: ...Subject to change without notice 34 A C D B 24 B D C A 23 YPA Board 21 A D B C...
Page 39: ...Subject to change without notice 38 YPA Board 35 32 34 31 33 TB Board XY Board...
Page 41: ...Subject to change without notice 40 37 36B Pin 14 Pin 1 CT Board 36A XY Board...
