Fluke PM3082 Service Manual page 438

6 - 1 2
Settings/procedure:
1 - Apply a 1 kHz sine wave signal with an amplitude of 0.8 V(pp) to input CH1.
2 - Press the AUTOSET key and set CH1 to 0.1 V/div.
Requirements
Turn the CH1 POS control fully clockwise and counterclockwise and verify that top and bottom of the
8 divisions signal can be positioned outside the graticule.
Repeat the above settings and procedure for CH2, CH3, and CH4.
6.3.15 Vertical deflection; crosstalk between channels at 100/200 MHz
At higher frequencies there exists some crosstalk between any two channels. In the following test,
crosstalk is verified at a high frequency.
Test equipment:
Fluke 5500A mode: levsine (Alternative: constant amplitude sine wave generator SG 503)
Test set up:
5500A
Settings/procedure:
1 - Apply a 200 MHz (PM3092, PM3094) or 100 MHz (PM3082, PM3084) sine-wave signal of
0.8V (pp into 500) to input CH1.
2 - Press the AUTOSET key.
3 - Use a 50Q termination. Use the internal termination when available.
4 - Switch all channels ON.
5 - Set all channels to 0.1 V/div.
6 - Adjust the generator to a signal amplitude of 8 div.
7 - Activate the GND function of CH2, CH3, and CH4 (if present on the oscilloscope).
Requirements:
Verify that the displayed amplitude the channels with no input signal applied is less than
0.16 divisions, (better than 1:50).
Repeat the above settings and procedure:
Input signal applied to CH2. CH1, CH3, and CH4 input GND.
Input signal applied to CH3. CH1, CH2, and CH4 input GND.
Input signal applied to CH4. CH1, CH2, and CH3 input GND.
OSCILLOSCOPE UNDER TEST
50£i CABLE
PERFORMANCE TEST