Delay Difference Between Vertical Channels - Fluke Autoranging CombiScope PM3370B Reference Manual

4 - 24
9 - Press the 'V' key and verify that the base line jump is not more than
0.2 divisions between 5.00V to 12.5V/div.
10 - Press the 'mV' key and verify that the base line jump does not 0.2 divisions
between 12.5V/div to 5 mV/div.
11 - Press the INV key repeatedly and verify that the base line jump is not more
than 0.2 divisions.
For the PM3394B and PM3384B repeat the above procedure for CH3 and CH4.
The CH3 settings are equal to those of CH1; the CH4 settings are equal to CH2.
For PM3390B, PM3380B and PM3370B no further steps required.
4.3.21

Delay difference between vertical channels

The delay difference between CH1, CH2, CH3, and CH4 is checked here.
Test equipment:
Fluke 5500A mode: edge (Alternative: Square wave calibration generator PG 506).
Power splitter
Test set up:
Settings/procedure:
1 - Apply a square-wave signal with a fast rise time of less than 1 ns, and an
amplitude of 1V (into 50Ω), with a frequency of 1 MHz, to inputs CH1 and
CH2.
Use a power splitter and two cables of equal length to CH1 and CH2.
2 - Press the AUTOSET key.
3 - Use 50Ω terminations. Use the internal terminations when available on
both channels (via VERT MENU key).
4 - Set CH1 and CH2 to 0.1V/div and input coupling to DC.
PERFORMANCE TEST