Agilent Technologies E4438C Instalační příručka stáhnout pdf (Strana 73)

Performance Tests

Timebase Aging Rate (Manual Test - Option UNJ, Option 506, or Option 1E5 Only)

3-25

Equipment Setup

Figure 3-23 Timebase Aging Rate

(Manual Test - Option UNJ, Option 506, or Option 1E5 Only) Setup

Procedure

1. Preset all instruments and let them warm up for at least one hour.

2. If the oscilloscope does not have a 50Ω input impedance, connect channel 1 through a 50Ω feedthrough.

3. On the oscilloscope, adjust the external triggering for a display of the 10 MHz REF OUTPUT signal from

the synthesizer.

a. On Channel 1 of the oscilloscope, set the following:

•Display: On

• Volts/Division: 500 mV

• Input Coupling: dc

• Input Impedance: 50 ohms (or use a 50 ohm feedthrough)

b. On Channel 2 of the oscilloscope, set the following:

•Display: Off

• Input Coupling: dc

• Input Impedance: 50 ohms (or use a 50 ohm feedthrough)

c. On the Timebase of the oscilloscope, set the following:

• Time/Division: 5 ns

d. On the Trigger of the oscilloscope, set the following:

• Trigger Source: CH 2

• Trigger Mode: Normal

• Trigger Level: 0 V

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 139 140

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Agilent Technologies E4438C Instalační příručka Strana 73