Agilent Technologies HP 3325B Manual de instrucciones descargar pdf (Pagina 73)

Chapter 1 Performance Tests

Test 1: Trigger Level (Agilent 53181A Only)

Assembly-Level Service Guide 1-49

Procedure

1 Connect the output of the Agilent 3325B to Channel 1 of the Counter as shown in

Figure 1-11.

Figure 1-11. Trigger Level Test Setup

2 Set the Agilent 3325B to output a 1 MHz, 80 mVp-p square wave signal.

3 Set the Agilent 3325B DC OFFSET to −60 mV.

4 On the Counter, press Run key.

5 Now, increment the dc offset on the Agilent 3325B by +1 mV until the Counter’s

Gate annunciator flashes and continue incrementing until the Counter displays

approximately 1 MHz.

Observe the offset value on the display of the Agilent 3325B.

Record the dc offset value__________ mV.

6 Add the upper peak voltage (40 mV) of the 80 mV p-p signal to the offset value in

step 5 (For example, −24 mV + 40 mV = 16 mv).

This is the upper hysteresis level.

Record the upper hysteresis level__________ mV.

HP 53181A

Counter

Channel 1

HP 3325B

Synthesizer

Output

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 251 252

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Agilent Technologies HP 3325B Manual de instrucciones Pagina 73