Agilent Technologies 54853A, Руководство по обслуживанию, Страница: 58 / 194

Chapter 3: Testing Performance
DC Measurement Accuracy (Single Cursor) Test
3–14
6
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 DMM voltage reading (V
DMM
) and the
scope Vavg reading (V
Scope
) in the DC Measurement Accuracy (Single Cursor) Test
section of the Performance Test Record. For all scope readings in this procedure, use
the mean value in the Measurements display area at the bottom of the screen. Calculate
the upper and lower limits for this test using the V
DMM
reading and the Max Scope
Error (V
ERR
) value in the results table. V
Scope
must be between these two limits to pass
this test.
7
Change the vertical sensitivity of channel 1 to 20 mV/div.
8
Change the Aux output voltage to +60 mV DC as in step 4 above.
9
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 DMM voltage reading and the scope V avg
reading in the DC Measurement Accuracy (Single Cursor) Test section of the
Performance Test Record.
10
Repeat steps 7, 8 and 9 for the remaining channel 1 vertical sensitivities in the table.
For each measurement, set the Aux Out voltage to the "V
Aux Out
Setting" column in the
DC Measurement Accuracy (Single Cursor) Test section of the Performance Test
Record for each of the vertical sensitivities.
11
Move the BNC Tee adapter to scope channel 2. Press Default Setup, then turn off
channel 1 and turn channel 2 display on.
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