5080A
Service Manual
60
Calibration Steps
Note
The Product mainframe must be calibrated before you start to
calibrate the SC200 option.
Adjustments can be necessary after repair of the SC200. Hardware adjustments
must be done before calibration. You must calibrate the option after hardware
adjustments. See the Hardware Adjustment section.
Note
The Product mainframe must complete its warm-up period and the
SC200 must be turned on (SCOPE button green LED on) for a
minimum of five minutes before you start the calibration. The
mainframe warm-up period must be a minimum of two times the
Product off time or a maximum of 30 minutes.
To calibrate the SC200 through the front panel:
1. Push .
2. Push the CAL softkey.
3. Push the SCOPE CAL softkey.
Note
If you start the SCOPE CAL mode before the five minutes after you
push , an error message will show in the display.
The Product first prompts to calibrate the dc voltage function. Push the OPTIONS
and NEXT SECTION softkeys until the function to calibrate shows in the display.
Calibration and Verification of the Square Wave Functions
The SC200 ac voltage and edge functions have square wave voltages that must
be calibrated and made sure they equal specifications.
The Hewlett Packard 3458A is setup as a digitizer to measure the peak-to-peak
value of the signal. Set the meter to the dcv function and the different analog-to-
digital integration times and trigger commands to measure the topline and
baseline of the square wave signal.
Note
You can set the different meter set ups into the HP3458A user
defined keys to quickly change the meter setup. For example, to
make topline measurements at 1 kHz, you can set the meter to
NPLC .01, LEVEL 1, DELAY<SL> .0002, TRIG LEVEL. To find the
average of multiple measurements, you can program one of the user
keys to MATH OFF, MATH STAT<SL> and then use the RMATH
MEAN function to recall the average or mean value of the readings.
Table 43 is a list of parameters you set in to the HP3458A for the square wave
and edge calibration and verification.
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