Hameg CombiScope HM1508-2 Service Manual

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Subject to change without notice
Table of Content
A Test Instruments required
B Performance Check
C Software Adjustment Menu
D Checks
1. Trace Rotation Check
2. CH1 5 mV/div: 100 Hz Square Wave
3. CH1 2 mV/div: 100 Hz Square Wave
4. CH2 5 mV/div: 100 Hz Square Wave
5. CH2 2 mV/div: 100 Hz Square Wave
6. CH 1: Attenuator Compensation
7. CH 2: Attenuator Compensation
8. CH 1: Y Accuracy
9. CH 2: Y Accuracy
10. ADD Accuracy (5 mV/div.)
11. CH 1: Y-Amplifi er Overshoot (Analog/Digital)
12. CH 2: Y-Amplifi er Overshoot (Analog/Digital)
13. CH 1: 5 mV/div. Y-Amplifi er Bandwidth (Analog/Digital)
14. CH 2: 5 mV/div. Y-Amplifi er Bandwidth (Analog/Digital)
15. CH 1: 1 mV/div. Y-Amplifi er Bandwidth (Analog/Digital)
16. CH 2: 1 mV/div. Y-Amplifi er Bandwidth (Analog/Digital)
17. CH 1: 5 mV/div: XY mode X Accuracy (3%), (Analog/Digital)
18. CH 1: 5 mV/div: XY mode X Bandwidth (Analog/Digital)
19. CH 1 Time Base A: Trigger Sensitivity (internal triggering)
20. CH 1 Time Base B: Trigger Sensitivity (internal triggering)
21. CH 2 Time Base A: Trigger Sensitivity (internal triggering)
22. CH 1: Trigger Bandwidth (internal triggering)
23. CH 2: Trigger Bandwidth (internal triggering)
24. Video Trigger Check
25. CH 3 TTL Trigger Threshold Check
26. CH 3 USER defi nable Trigger Threshold Check
27. CH 4 TTL Trigger Threshold Check
28. CH 4 USER defi nable Trigger Threshold Check
29. Trigger Filter Check
30. Time Base A: Extern Trigger Sensitivity
31. Time Base A: Extern Trigger Bandwidth
32. Time Base A: Accuracy (Analog)
33. Time Base B: Accuracy (Analog)
34. Time Base A: Magnifi cation x10 (Analog)
35. Digital Time Base Accuracy
36. Z Input
37. COMP. Tester Function
A Test Instruments required
1) Fast rise time (<1ns) square wave generator: 10 Hz to
1 MHz (switchable in decades), 25 mV
pp
output at 50Ω
through termination, overshoot less than 1% of signal
amplitude (e.g. HZ620, HF-BOX, BOX II).
2) Constant amplitude sine wave generator, 20 Hz – 500 MHz,
output 5 mV – 5 V into 50
Ω preferably with 20dB attenuation
(e.g. HM 8134-3, HM8135).
3) Amplitude Calibrator with 1 kHz square wave output and
600
Ω impedance, rise time faster than 100 ns. Output vol-
tage 10 mV
pp
– 40 V
pp
in 1 – 2.5 - 5 sequence for 5 divisions
display amplitude (e.g. HZ620) with the exception of 40 V
pp
.
Accuracy 0.1% or better.
4) Time mark generator from 10 ns/div to 1 s/div. Output min.
10 mV into 50
Ω (e.g. HZ620).
5) Pre-attenuator 2:1 (1M Ohm parallel with 10-25 pF), e.g.
HZ20 (e.g. HZ620 with H1x0x LF-BOX).
6) 2 50
Ω BNC through termination, e.g. HZ22 (e.g. HZ620 with
H1x0x LF-BOX).
7) 2 BNC-cables, 50Ω, e.g. HZ34.
8) 50
Ω 6 dB splitter with 2 outputs.
9) Video signal generator with positive and negative signal
output (or pos. Video SSignal together with HZ620).
B Performance Check
This procedure covers the most important - but not all - per-
formance checks.
Basic Settings
STOP
Do not check the instrument until the normal opera-
ting temperature is reached, after a minimum warmup
time of 30 minutes.
STOP
The performance check can be made easy by aid of the
software in connection with HZ620 and HM813x.
Before starting each adjustment procedure, set the oscillos-
cope to the following settings:
1. Select Analog Mode.
2. Do not apply a signal to an input.
3. Press VERT/XY pushbutton and select CH 1.
4. Press AUTOSET pushbutton.
5. Press MODE pushbutton in the TRIGGER section of the front
panel.
6. Press FILTER pushbutton in the TRIGGER section of the
front panel.
7. Check that <Trig. Filter> AC, <LF> Off, <Noise Reject> Off
and <SLOPE> Rising are selected.
8. Press SOURCE pushbutton in the TRIGGER section of the
front panel.
9. Press CH 1 pushbutton.
10. Check that <CH 1> DC, Ground (GND) Off, Invert Off, Variable
Off and Probe *1 are selected.
For channel 2 performance checks, please note the fol-
lowing deviations:
11. Press CH 2 pushbutton.
12. Check that <CH 2> DC, Ground (GND) Off, Invert Off, Vari-
able Off and Probe *1 are selected.
If different settings are required, they are mentioned particu-
larly for each subject. Do not check the instrument until the
normal operating temperature is reached, after a minimum
warm up time of 30 minutes.
C Software Adjustment Menu
STOP
Attention:
To avoid misuse and misalignment, do not publicise
how to enter the Software Adjustment Menu.
Performance Check HM1508-2
Performance Check HM1508-2

Hameg CombiScope HM1508-2 Specifications

General

Brand	Hameg
Model	CombiScope HM1508-2
Category	Measuring Instruments
Language	English