HP 1660CS, User Manual

Page: 320 / 347

Self Cal menu calibrations
Messages will be displayed as each calibration routine is completed to
indicate calibration has passed or failed. The resulting calibration factors are
automatically stored to nonvolatile RAM at the conclusion of each calibration
routine.
The Self Cal menu lets you optimize vertical sensitivity (Vert Cal) for
channels 1 and 2 individually or both channels on a board simultaneously.
Also, the Self Cal menu lets you optimize delay (Delay) for channel 1 and 2
separately, then Time Null for channel 2 and the Logic Trigger.
1
Optimize Vert Cal of the Self Cal.
a Connect two BNC 50-
Ω
, 9-inch cables to the BNC tee adapter.
Connect the BNC 50
Ω
(f)(f) adapter to the BNC tee adapter, and
connect the 48-inch BNC cable to the BNC 50
Ω
(f)(f) adapter. Once
you select Start, the instrument will prompt you to connect the cables
to the appropriate locations on the rear panel of the instrument.
b
Select the Mode field, then select Self Cal from the pop-up menu.
c
Select the Procedure field, then select Vert Cal from the pop-up menu.
d
Select the Channel field, then select a channel choice from the pop-up
menu.
e
Select the Start field and follow the instructions on the display.
f
After completion of Vertical Calibration, remove the cables from the
instrument.
2
Optimize Delay of the Self Cal.
a
Obtain a BNC 50-
Ω
, 48-inch cable. Once you select Start, the
instrument will prompt you to connect the cable to the appropriate
location on the rear panel of the instrument.
b
Select the Procedure field, then select Delay from the pop-up menu.
c
Select the Channel field, then select C1.
d
Select the Start field and follow the instructions on the display.
e
Repeat steps c and d for channel 2.
f
After completing all of the channel delay calibrations, remove the
cable from the oscilloscope.
Calibrating the oscilloscope
Self Cal menu calibrations
12-9