1
Subject to change without notice
Oscilloscope
HM304
Test Instructions
General ................................................................... 23
Astigmatism Check ............................................... 23
Symmetry and Drift of the Vertical Amplifier ....... 23
Calibration of the Vertical Amplifier ....................... 23
Transmission Performance of the
Vertical Amplifier .................................................... 23
Triggering Checks .................................................. 24
Timebase ................................................................ 24
Holdoff time ........................................................... 25
Component Tester ................................................. 25
Trace Alignment ..................................................... 25
Service Instructions
General ................................................................... 25
Instrument Case Removal ..................................... 25
Operating Voltages ................................................ 26
Maximum and Minimum Brightness .................... 26
Astigmatism control .............................................. 26
Trigger Threshold ................................................... 26
Trouble-Shooting the Instrument .......................... 26
Adjustments ........................................................... 26
RS232 Interface - Remote Control ....................... 27
Baud-Rate Setting .................................................. 27
Data Communication ............................................. 27
Command definition .............................................. 27
Command Chart: ................................................... 27
Instrument Data Field with Single Commands .... 28
Short instruction for HM304 ................................. 29
Switching on and initial setting ............................. 29
Vertical amplifier mode .......................................... 29
Triggering mode ..................................................... 29
Measurements ...................................................... 29
Component tester mode ....................................... 29
Front Panel Elements HM304
(Brief Description - Front View) ............................. 30
Oscilloscope data sheet with technical details
. .... 4
Operating Instructions
General Information ................................................. 5
Symbols ................................................................... 5
Use of tilt handle ..................................................... 5
Safety ....................................................................... 5
Operating conditions ............................................... 5
EMC ......................................................................... 6
Warranty .................................................................. 6
Maintenance ............................................................ 6
Protective Switch-Off .............................................. 6
Power supply ........................................................... 6
Type of signal voltage .............................................. 7
Amplitude Measurements ....................................... 7
Total value of input voltage ..................................... 8
Time Measurements ............................................... 8
Connection of Test Signal ........................................ 9
First Time Operation .............................................. 10
Trace Rotation TR .................................................. 10
Probe compensation and use ............................... 11
Adjustment at 1kHz ............................................... 11
Adjustment at 1MHz ............................................. 11
Operating modes of the vertical
amplifiers in Yt mode. ........................................... 12
X-Y Operation ......................................................... 12
Phase comparison with Lissajous figures ............ 13
Phase difference measurement
in DUAL mode ....................................................... 13
Measurement of an ............................................... 13
amplitude modulation ............................................ 13
Triggering and time base ....................................... 14
Automatic Peak-Triggering .................................... 14
Normal Triggering .................................................. 15
Slope ...................................................................... 15
Trigger coupling ...................................................... 15
Line triggering (~) .................................................. 16
Alternate triggering ................................................ 16
External triggering ................................................. 16
Trigger indicator ..................................................... 16
Holdoff-time adjustment ....................................... 16
Delay / After Delay Triggering ............................... 17
AUTO SET .............................................................. 18
SAVE/RECALL ........................................................ 19
Component Tester ................................................. 19
Using the Component Tester ................................ 19
Test Procedure ....................................................... 19
Test Pattern Displays ............................................. 19
Testing Resistors ................................................... 20
Testing Capacitors and Inductors .......................... 20
Testing Semiconductors ........................................ 20
Testing Diodes ....................................................... 20
Testing Transistors ................................................. 20
In-Circuit Tests ....................................................... 20
Table of contents
St.170698-Hüb/Ros/goRR
GB
