Service manual

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Performance Test
Performance Test
2. Performance Test
Figure 2-7 DC Bias Monitor Accuracy Test (current) Setup
9. Press Reset key (blue - ⇒) to initialize the multimeter, then Set it as follows.
a. Press [DCI] to set the measurement mode to DC current.
b. Press [NPLC] - [1] - [0] - [0] - [Enter].
10. Press [Preset] to initialize the 4294A, then set it as follows.
Setting Operation
OSC Level: 0 V
*1.OSC level is set to 5 mV automatically.
*1
[Source] - [0] - [×1]
DC Bias Mode: Voltage [Source] - BIAS MENU - MODE - VOLT
DC Bias Monitor: Current [Display] - BIAS MON - CURRENT
DC Bias Level: 0 V [Source] - BIAS MENU - VOLTAGE LEVEL - [0] -
[×1]
11. Perform as follows to adjust the actual 4294A OSC output level to the test point.
a. Set the DC Bias level to “DC Bias Setting 1” column in the calculation sheet.
b. Press [Trigger] - Single for a single sweep measurement:
c. Record the multimeter reading to “Multimeter reading 1” column in the calculation
sheet.
d. Calculate “DC Bias Setting 2” according to the calculation sheet, then set the DC
Bias level to it.
NOTE When test point is “0 mA”, Step b and c is not required.