Agilent Technologies 46A, 45A, 54835A manual Turn on Channel 1 and turn off all other channels

Chapter 3: Testing Performance

To test trigger sensitivity

5Turn on Channel 1 and turn off all other channels.

You can do this by using the channel keys above each input BNC or by using the check boxes at the top of the waveform display area.

6Set vertical scale for channel 1 to 200 mV/div. Select dc coupling and 50Ω input impedance.

7With an N cable and N-to-BNC adapter, connect the signal generator to the channel 1 input.

8Set the signal frequency to 100 MHz and output level for 0.5 divisions of vertical deflection.

You can use the markers to set a 0.5 division reference. Select Markers from the Measure menu and select Manual Placement in the dialog that appears. Both Markers should be set to the same channel. Set the Y value for Marker A to +50.0 mV and the Y value for Marker B to –50.0 mV, then click Close. (If the markers do not appear on the screen, press the Marker A and Marker B keys on the front panel.) See figure 3-17.

Figure 3-17

Setting the Markers for a 0.5 Division Reference

9Press the Sweep key (Trigger section of the front panel controls) to select Trig’d.

The scope’s Armed and Trig’d LEDs (in the Horizontal section of the front panel) should flash. However, the waveform display may not be stable.

10Adjust the trigger level control for a stable display.

11The test passes if triggering is stable. Record the result in the Performance Test Record.

12Set the signal frequency to 500 MHz and the output level for 1 division of vertical deflection.

Again, you can use the markers to check the deflection, with one set to +100 mV and the other to –100 mV.

13Adjust the horizontal sweep speed to 1 ns/div.

14Adjust the trigger level for a stable display.

15The test passes if triggering is stable. Record the result in the Performance Test Record.

16Set the signal frequency to 1.0 GHz and the output level for 1.5 division of vertical deflection.

Again, you can use the markers to check the deflection, with one set to +150 mV and the other to –150 mV.

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