PERFORMANCE TEST
4 - 11
Repeat the settings/procedure in table I for CH2, CH3 and CH4. Use table II for
PM3370B/80B/90B to test TRIG VIEW via input EXT TRIG. Select AC input
coupling to center the trace on the screen.
table II.
Input voltage Setting
Requirements
Requirements
(pp)
analog mode
digital mode
0.6V
0.1V
5.82...6.18 div (
±
3%)
5.82...6.18 (
±
3%)
6V
1V
5.82...6.18 div (
±
3%)
5.82...6.18 (
±
3%)
-
Press the ANALOG key (’DIGITAL MODE’ is displayed briefly), and repeat the
tests in this chapter for the digital mode.
-
Press the ANALOG key (’ANALOG MODE’ is displayed briefly) to return to
analog mode.
4.3.7
Vertical deflection; variable gain control range
(continuation of 4.3.6)
This test checks the vertical VARiable gain control.
Settings/procedure:
1 -
Apply a square-wave signal of 0.2V to input CH1 and press AUTOSET.
2 -
Set CH1 to 50 mV/div and input coupling to DC. Using the CH1 POS
control, center the waveform in the screen.
3 -
Select the VARiable mode by simultaneously pressing both AMPL keys.
The readout changes into 50.0 mV/div.
4 -
Press the mV key to adjust an input sensitivity of 40.0 mV/div.
Requirements:
1 -
Verify that the displayed amplitude is between 4.86 and 5.14 divisions
(+/- 2.8%).
2 -
Repeat the settings and procedure for CH2. For the PM3394B and
PM3384B repeat the same steps for CH3 and CH4.
4.3.8
Vertical deflection; input coupling (continuation of 4.3.7)
This test verifies the operation of the AC input coupling. Also, the operation of the
ground (GND) function is checked.