Agilent Technologies 54853A, Service Manual, Page: 51 / 194

Chapter 3: Testing Performance
Offset Performance Test
3–7
4
Press the Clear Display key on the scope, wait for the #Avgs value (top left corner of
screen) to return to 256 and then record the scope’s mean V avg reading in the Zero
Error Test section of the Performance Test Record.
5
Change the vertical sensitivity of channel 1 to 20 mV/div, press the Clear Display key,
wait for the #Avgs value (top left corner of screen) to return to 256 and then record the
scope V avg reading in the Zero Error Test section of the Performance Test Record.
6
Repeat step 5 for the remaining vertical sensitivities for channel 1 in the Zero Error
Test section of the Performance Test Record.
7
Press Default Setup, then turn off channel 1 and turn channel 2 display on.
8
Configure the scope to measure V avg on Channel 2 as follows:
a Pull down the Utilities menu and select Acquisition. When the Acquisition Setup window
is displayed, enable averaging and set the # of averages to 256.
b Change the vertical sensitivity of channel 2 to 10 mV/div.
c
Click the V avg measurement icon on the left side of the screen.
d When the Enter Measurement Info window is displayed, ensure that the Vavg function
is set up as follows and then click OK:
Source = Channel 2
Measurement area = Entire Display
9
Press the Clear Display key on the scope, wait for the #Avgs value to return to 256 and
then record the DMM voltage reading and the scope V avg reading in the Zero Error
Test section of the Performance Test Record.
10
Repeat step 9 for the remaining vertical sensitivities for channel 2 in the Zero Error
section of the Performance Test Record.
11
Repeat steps 7 through 10 for channels 3 and 4.
Notes
• For all scope readings in this procedure, use the mean value in the Measurements display area at the
bottom of the screen.
• If a question mark is displayed in front of any of the values at the bottom of the screen, press the Clear
Display key on the scope, wait for the #Avgs value to return to 256 and then record the scope reading.
Record the
mean reading