Tektronix IntelliFrame VX1410A Instruction Manual page 263

Performance Verification
DC Load Ripple and Noise
5–2
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Use an oscilloscope to check the DC Load Ripple and Noise on the pins of the
25-pin connector and compare the results against the limits listed in Table 5–1.
1. Set up the oscilloscope as follows:
Bandwidth Limit
Input Coupling
Volts/Division
Time Base
Trigger Mode
Acquisition Mode
2. Connect a ground lead (less than one inch) to the 1X oscilloscope probe
(P6101B).
3. Connect the probe to Pin 1 of the 25-pin connector and connect the ground
lead to one of the ground pins listed in Table 5–1.
4. Check that peak-to-peak voltage displayed on the oscilloscope is less than
the limits listed in Table 5–1.
5. Check the remaining voltages in Table 5–1.
Table 5–1: DC load ripple and noise check
Pin
1
2
3
4
14
15
16
9, 17, 8,19, 20, 22, 24
VX1410A & VX1420A IntelliFrame Mainframe Instruction Manual
20 MHz
AC
10 mV/div
1 s/div
Auto
Peak Detect
Supply
+5 V
–12 V
–24 V
–2 V
+12 V
+ 24 V
–5.2 V
Ground
Limits (V )
p-p
50 mV
50 mV
150 mV
50 mV
50 mV
150 mV
50 mV