Keysight Technologies InfiniiVision 2000, Service Manual

Page: 25 / 86

Testing Performance
2
2000/3000 X-Series Oscilloscopes Service Guide 25
1 Turn on the test equipment and the oscilloscope. Let them warm up for 30
minutes before starting the test.
2 Set up the precision source.
a Set the precision source to provide a DC offset voltage at the Channel 1
output.
Note: Set the Low Force terminal of the Precision Source to its "Floating"
state to prevent offset error caused by ground loop current from the
Precision Source ground to the DUT ground.
b Use the multimeter to monitor the precision source DC output voltage.
3 Use the 8-by-2 test connector and the BNC cable assembly to connect digital
channels D0-D7 to one side of the BNC Tee. Then connect the D0-D7 ground
lead to the ground side of the 8-by-2 connector. See Figure 2 .
Table 4 Equipment Required to Test Digital Channel Threshold Accuracy
Equipment Critical Specifications Recommended Model/Part
Digital Multimeter 0.1 mV resolution, 0.005% accuracy Keysight 34401A/34461A
Precision Source DC voltage of -5.5 V to 5.5 V, 10 mV resolution Keysight B2912A/B2962A
Adapter (qty 2) BNC(f) to banana (m) Keysight 1251-2277
BNC Tee BNC Tee (m) (f) (f) Keysight 1250-0781 or Pomona 3285
50
Ω
BNC Cable BNC - BNC, 48” length Keysight 8120-1840
BNC Test Connector,
8-by-2
User-built (See page 21 )
Probe Cable No substitute 16-chanel: Keysight N6450-60001 or
N2756-60001
8-channel: Keysight N6459-60001 or
N2755-60001