Technical data

2-20
Performance Verification
Trigger Verification (Standard and Option 001)
16 Record the value of the trigger level as V pos:
V pos ______________ mV
17 Return the trigger level to 0 volts, then slowly adjust the trigger level counterclockwise until the
DCA just stops triggering.
18 Record the value of the trigger as V neg:
V neg ______________ mV
19 Calculate the Hysteresis as follows:
Hysteresis = 100 mV (V pos V neg)
20 Record the result in the Performance Test Record as Hysteresis.
Trigger Sensitivity
On the following tests, the 100 MHz and 2.5 GHz signals are used. The trigger level is adjusted
positive and negative as in the preceding test.
100 MHz To perform the Trigger Sensitivity test with a 100 MHz signal, follow these steps.
1 Replace the Function/Arbitrary Waveform Generator with the Synthesized CW Generator.
2 On the DCA front panel, set the trigger level to 0 V.
3 On the DCA screen, press Time Delay, set the Scale (horizontal) to 2 ns/div.
4 Set the Synthesized CW Generator FREQ to 100 MHz and adjust the POWER LEVEL for a
current reading of 150 mV ±1 mV on the DCA.
5 On the DCA front panel, adjust the Trigger Level knob clockwise until the DCA just stops
triggering as indicated by the Trig’d light going off.
6 Record the trigger value below as V pos:
V pos ______________ mV
7 Return the Trigger Level to 0 V.
8 On the DCA front panel, adjust the Trigger Level knob counterclockwise until the DCA just stops
triggering as indicated by the Trig’d light going off.
9 Record the trigger value below as V neg:
V neg ______________ mV
10 Calculate the Sensitivity as follows:
Vsense 100 MHz = 150 mV (V pos V neg)
11 Record the result in the Performance Test Record as 100 MHz Sensitivity.
2.5 GHz To perform the Trigger Sensitivity test with a 2.5 GHz signal, follow these steps.
12 On the DCA screen, press Trigger Level and set the Hysteresis to High Sensitivity.
13 On the DCA screen, press Time Delay, set the Scale (horizontal) to 100 ps/div.
14 On the DCA screen, press Scale Offset, set the Scale (vertical) to 50 mV / div.
15 Set the Synthesized CW Generator FREQ to 2.5 GHz and adjust the POWER LEVEL for a current
reading of 200 mV ± 2 mV on the DCA.
16 On the DCA front panel, adjust the Trigger Level to 0 V.