33
Subject to change without notice
P e r f o r m a n c e C h e c k H M 3 0 3 - 6
5.10 CH I 1 V/div (3% accuracy)
– Set attenuator CH I to 1 V/div.
– Connect a 5 V
pp
(accuracy ± 0.1%), 1 kHz square wave signal
via 50
Ω
cable to input CH I.
– For 0% error the signal height is 5 div.
Continue with item 5.11.
5.11 CH I 2 V/div (3% accuracy)
– Set attenuator CH I to 2 V/div.
– Connect a 10 V
pp
(accuracy ± 0.1%), 1 kHz square wave signal
via 50
Ω
cable to input CH I.
– For 0% error the signal height is 5 div.
Continue with item 5.12.
5.12 CH I 5 V/div (3% accuracy)
– Set attenuator CH I to 5 V/div.
– Connect a 25 V
pp
(accuracy ± 0.1%), 1 kHz square wave signal
via 50
Ω
cable to input CH I.
– For 0% error the signal height is 5 div.
Continue with item 5.13.
5.13 CH I 10 V/div (3% accuracy)
– Set attenuator CH I to 10 V/div.
– Connect a 40 V
pp
(accuracy ± 0.1%), 1 kHz square wave signal
via 50
Ω
cable to input CH I.
– For 0% error the signal height is 4 div. (3% = 1.2 mm).
Continue with item 5.14.
5.14 CH I 20 V/div (3% accuracy)
– Set attenuator CH I to 20 V/div.
– Connect a 40 V
pp
(accuracy ± 0.1%), 1 kHz square wave signal
via 50
Ω
cable to input CH I.
– For 0% error the signal height is 2 div. (3% = 0.6 mm).
6. CH II: Y Accuracy
The accuracy reading should always be performed in the following
way.
A: Set the square wave bottom on a horizontal graticule line
and check the height of the square wave top at the (hori-
zontal) screen centre.
B: Calculate the deviation in respect to the specifi cations.
A 5% error of 5 div. (50 mm) height means that the ac-
ceptance range is from 47.5 mm to 52.5 mm; 3% means
±1.5 mm)
– Check that input coupling CH II is set to DC.
– Check that CH II variable gain knob is set to CAL. positi-
on.
– Set time base to 0.5 ms/div.
– Press CH I/II pushbutton (IN position) to select channel II.
6.1 CH II 1 mV/div (5% accuracy)
– Set attenuator CH II to 5 mV/div.
– Press Y-MAG x5 pushbutton (IN position).
Note:
5 mV/div in combination with Y-MAG x5 results in
1 mV/div.
– Connect a 5 mV
pp
(accuracy ± 0.1%), 1 kHz square wave
signal via 50
Ω
cable to input CH II.
Note:
If HZ620 is used, the minimum voltage is 10 mV without 50
Ω
terminator. As the HZ620 internal resistor is 50 Ω, connect
a 50
Ω
through resistor at the oscilloscope input, to reduce
the input voltage to 5 mV
pp
.
– For 0% error the signal height is 5 div.
Note:
If HZ620 is used in combination with a 50
Ω
through termi-
nator, please remove it as it is no longer required in the
following checks.
Continue with item 6.2.
6.2 CH II 2 mV/div (5% accuracy)
– Set attenuator CH II to 10 mV/div.
Note:
10 mV/div in combination with Y-MAG x5 results in
2 mV/div.
– Connect a 10 mV
pp
(accuracy ± 0.1%), 1 kHz square wave
signal via 50
Ω
cable to input CH II.
– For 0% error the signal height is 5 div.
– Press Y-MAG x5 pushbutton to release it (OUT position).
Continue with item 6.3.
6.3 CH II 5 mV/div (3% accuracy)
– Set attenuator CH II to 5 mV/div.
– Connect a 25 mV
pp
(accuracy ± 0.1%), 1 kHz square wave
signal via 50
Ω
cable to input CH II.
– For 0% error the signal height is 5 div.
Continue with item 6.3.1
6.3.1 Variable Gain 2.5:1
– Check that the signal display height is 5 division.
– Turn channel 2 VAR. 2.5:1 knob fully counter clockwise.
– Check that the signal height is less 2 division.
– Turn channel 2 VAR. 2.5:1 knob fully clockwise to its cali-
brated detent.
Continue with item 6.4.
6.4 CH II 10 mV/div (3% accuracy)
– Set attenuator CH II to 10 mV/div.
– Connect a 50 mV
pp
(accuracy ± 0.1%), 1 kHz square wave
signal via 50
Ω
cable to input CH II.
– For 0% error the signal height is 5 div.
Continue with item 6.5.
6.5 CH II 20 mV/div (3% accuracy)
– Set attenuator CH II to 20 mV/div.
– Connect a 100 mV
pp
(accuracy ± 0.1%), 1 kHz square wave
signal via 50
Ω
cable to input CH II.
– For 0% error the signal height is 5 div.
Continue with item 6.6.
6.6 CH II 50 mV/div (3% accuracy)
– Set attenuator CH II to 50 mV/div.
– Connect a 250 mV
pp
(accuracy ± 0.1%), 1 kHz square wave
signal via 50
Ω
cable to input CH II.
– For 0% error the signal height is 5 div.
Continue with item 6.7.
