Subject to change without notice
1
Operating Modes:CHI/II-TRIG.I/II, DUAL, ADD,
CHOP., INV.I/II and XY-Operation .................
24
Triggering Checks ..............................................
25
Timebase ...........................................................
25
Component Tester ............................................
26
Trace Alignment ................................................
26
Service Instructions
General ..............................................................
27
Instrument Case Removal .................................
27
Operating Voltages ............................................
27
Maximum and Minimum Brightness .................
27
Astigmatism control ..........................................
27
Trigger Threshold ..............................................
28
Trouble-Shooting the Instrument .......................
28
Replacement of Components and Parts ...........
28
Adjustments ......................................................
28
Short Instruction
. ...............................................
29
Front Panel Elements, Front View
. ..................
30
Table of contents
Oscilloscope datasheet
Operating Instructions
Symbols ............................................................
6
General Information ...........................................
6
Use of tilt handle ...............................................
6
Safety ................................................................
6
Operating conditions .........................................
7
Warranty ............................................................
7
Maintenance .....................................................
7
Protective Switch-Off ........................................
7
Power supply ....................................................
7
Type of signal voltage ........................................
8
Amplitude Measurements .................................
8
Time Measurements .........................................
9
Connection of Test Signal .................................
10
First Time Operation ..........................................
12
Trace Rotation TR ..............................................
12
Probe compensation and use ............................
12
Operating Modes of the Y Amplifier .................
14
X-Y Operation ....................................................
15
Phase difference measurement
in DUAL mode ............................................
15
Measurement of an amplitude modulation .......
16
Triggering and Timebase ...................................
16
Automatic Triggering .........................................
17
Normal Triggering, Slope ...................................
17
Trigger Coupling ................................................
17
Triggering of Video Signals ................................
17
Line Triggering ...................................................
17
Alternate Triggering ...........................................
17
External Triggering ............................................
17
Trigger Indicator ................................................
17
Function of variable HOLD OFF control .............
17
Y Overscanning Operation ................................
18
Component Tester ............................................
18
Test Patterns .....................................................
22
Test Instructions
General ..............................................................
23
Cathode-Ray Tube: Brightness, Focus,
Linearity, Raster Distortions .........
23
Astigmatism Check ...........................................
23
Symmetry and Drift of the Vertical Amplifier ....
23
Calibration of the Vertical Amplifier ...................
23
Transmission Performance
of the Vertical Amplifier .................................
24
Oscilloscope
HM 303
-4
GB
St. 170698/hüb/goRR
