52
Subject to change without notice
MANUAL ADJUSTMENT PROCEDURE HM1508-2
General Informations
Analog/Digital Oscilloscope HM1508-2
WARNING
The Instrument must be disconnected from the
mains power supply whenever you open the
case, repair or exchange parts.
HIGH VOLTAGE WARNING!
Hazardous High Voltage of up to 12,000 Volts is
present inside this Instrument. The areas par-
ticularly affected by High Voltage are the high
voltage circuit on the PS-board, the CRT anode
contact and the CRT-board.
SERVICE AND ADJUSTMENT
– of this instrument should only be performed in accordance and in conjunction with the operating manual and
the WARNINGS contained therein.
– should only be performed by suitably qualifi ed and experienced service personnel.
Test Instruments required:
1. Square wave generator: 10 Hz to 1 MHz (switchable in decades), 25 mV
pp
output at 50 through termination,
overshoot less than1% of signal amplitude (e.g. HZ60).
2. Constant amplitude sine wave generator, 20 Hz – 500 MHz, output 5 mV – 5 V into 50
preferably with 20dB
attenuation (e.g. HM8134).
3. Amplitude Calibrator with 1 kHz square wave output and 600
impedance, rise time faster than 150 ns.
Output voltage 2 mV – 20 Volts in 1-2-5 sequence for 4 divisions display amplitude (e.g. HZ62, TEK PG506).
4. Time mark generator from 5 ns/div to 5 s/div. Output min. 10 mV into 50 (e.g. HZ62, TEK TG501).
5. Pre-attenuator 2:1 (1M
parallel with 12-25 pF), e.g. HZ20.
6. 50
BNC through termination, e.g. HZ22.
7. 2 BNC-cables, 50 , e.g. HZ34.
8. BNC-T-connector.
9. Oscilloscope probe 10:1, with exactly 9 M series resistance and compensated for test oscilloscope menti-
oned under 10).
10. Oscilloscope 200 MHz, 5 mV/div to 5 V/div, e.g. HM2005.
11. All insulated trimming/adjusting tools.
12. Variable output safety insulation transformer.
13. Video signal generator with positive and negative signal output.
To Next Page
Loading...
Need help?
General
