1: 1 Mv/Div. Y-Amplifi Er Bandwidth (Analog/Digital); 1: 5 Mv/Div: Xy Mode X Bandwidth (Analog/Digital); 1 Time Base A: Trigger Sensitivity (Internal Triggering) - Hameg CombiScope HM1508-2 Service Manual

– Adjust the generator amplitude for 8 div. display height on
the screen.
– Increase the generator frequency until the signal height is
5.6 div. (-3dB).
– Under these conditions the generator frequency must be
higher then 150 MHz.
– Press ANALOG/DIGITAL key to switch over to digital mode.
– Check that the specifi cation is met too.
– Press ANALOG/DIGITAL key to return to analog mode.
15. CH 1: 1 mV/div. Y-Amplifi er Bandwidth
(Analog/Digital)
– Press VERT/XY pushbutton and check that Bandwidth is
set to Full.
– Press MENU OFF pushbutton.
– Connect a 8 mVpp, 50 kHz sine wave signal from a constant
amplitude generator via a 50Ω through termination to the
input of CH 1.
– Check that the attenuator is set to 5 mV/div.
– Set A time base to 20 μs/div.
– Adjust the generator amplitude for 8 div. display height on
the screen.
– Increase the generator frequency until the signal height is
5.6 div. (-3dB).
– Under these conditions the generator frequency must be
higher then 10 MHz.
– Press ANALOG/DIGITAL key to switch over to digital mode.
– Check that the specifi cation is met too.
– Press ANALOG/DIGITAL key to return to analog mode.
16. CH 2: 1 mV/div. Y-Amplifi er Bandwidth
(Analog/Digital)
– Connect a 8 mVpp, 50 kHz sine wave signal from a constant
amplitude generator via a 50Ω through termination to the
input of CH 2.
– Check that the attenuator is set to 5 mV/div.
– Set A time base to 20 μs/div.
– Adjust the generator amplitude for 8 div. display height on
the screen.
– Increase the generator frequency until the signal height is
5.6 div. (-3dB).
– Under these conditions the generator frequency must be
higher then 10 MHz.
– Press ANALOG/DIGITAL key to switch over to digital mode.
– Check that the specifi cation is met too.
– Press ANALOG/DIGITAL key to return to analog mode.
17. CH 1: 5 mV/div: XY mode X Accuracy (3%),
(Analog/Digital)
– Press VERT/XY pushbutton.
– Press XY function key.
– Connect a 25 mVpp, 100 Hz square wave signal via 50Ω cable
and 50Ω through terminator to input CH 1 (X-INP.).
– Check that DC input coupling is selected.
– Check that 2 dots are visible with a distance of 5 div.
(0% error) in X direction. (3% accuracy range 48.5 mm to
51.5 mm).
– Press ANALOG/DIGITAL key to switch over to digital mode.
– Check that the specifi cation is met too.
– Press ANALOG/DIGITAL key to return to analog mode.
P e r f o r m a n c e C h e c k H M 1 5 0 8 - 2
18. CH 1: 5 mV/div: XY mode X Bandwidth (Analog/Digital)
– Press VERT/XY pushbutton.
– Press XY function key.
– Connect a 40 mVpp, 50 kHz sine wave signal from a constant
amplitude generator via a 50Ω through termination to the
input of CH 1.
– Check that the attenuator is set to 5 mV/div.
– Adjust the generator amplitude for 8 div. display width on
the screen.
– Increase the generator frequency until the signal width is
5.6 div. (-3dB).
– Under these conditions the generator frequency must be
higher then 3 MHz.
– Press ANALOG/DIGITAL key to switch over to digital
mode.
– Set TIME/DIV knob for "100MSa" sampling rate.
– Increase the generator frequency until the signal width is
5.6 div. (-3dB).
– Under these conditions the generator frequency must be
higher then 150 MHz.
– Press ANALOG/DIGITAL key to return to analog mode.
19. CH 1 Time Base A: Trigger Sensitivity
(internal triggering)
– Connect a 25 mVpp, 50 kHz sine wave signal from a constant
amplitude generator via a 50Ω through termination to the
input of CH 1.
– Check that time base A is selected and set to 20 μs/div.
– Check that attenuator CH 1 (VOLTS/DIV) is set to 5 mV/div.
– Check that trigger source CH 1 is chosen.
– Adjust the generator amplitude for 5 div. display height on
the screen.
– Set attenuator to 50 mV/div, so that the signal height is
5 mm.
– Check that the signal can trigger the time base in AUTOMA-
TIC and NORMAL trigger mode in combination with AC- and
DC-trigger coupling and both slope settings.
– Continue with item 19 without changing the signal parame-
ters.
20. CH 1 Time Base B: Trigger Sensitivity
(internal triggering)
– Operate oscilloscope as described under item 18.
– Check that the signal is displayed with 5 mm height.
– Set time base A 200 μs/div.
– Select time base B mode.
– Set time base B to 20 μs/div
– Check that the signal can trigger the time base in AUTOMA-
TIC and NORMAL trigger mode in combination with AC- and
DC-trigger coupling and both edge settings.
21. CH 2 Time Base A: Trigger Sensitivity
(internal triggering)
– Connect a 25 mVpp, 50 kHz sine wave signal from a constant
amplitude generator via a 50Ω through termination to the
input of CH 2.
– Press VERT/XY pushbutton and select CH 2.
– Check that time base A is selected and set to 20 μs/div.
– Check that attenuator CH 2 (VOLTS/DIV) is set to 5 mV/div.
– Check that trigger source CH 2 is chosen.
– Adjust the generator amplitude for 5 div. display height on
the screen.
– Set attenuator to 50 mV/div, so that the signal height is
5 mm.
– Check that the signal can trigger the time base in AUTOMA-
TIC and NORMAL trigger mode in combination with AC- and
DC-trigger coupling and both slope settings.
Subject to change without notice
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