BK Precision 894 User Manual

48
Auto Level Control (ALC)
Auto level control function can adjust the actual test level (voltage across or current through
DUT) to the test level value. This function helps ensure a constant test voltage or current.
When using this function, the test level can be set within the range below:
Constant voltage: 10 mV
rms
to 1 V
rms
Constant current: 100 µA
rms
to 10 mA
rms
Setting Auto Level Control
1) In the <MEASURE SETUP> page, using the cursor keys, move the cursor to the ALC
field, and the following softkeys will be displayed:
2) Move the cursor to ALC, and the following softkeys are displayed:
 ON: Press to turn on the auto level control function.
 OFF: Press to turn off the auto level control function.
To ensure the best accuracy possible for the type of device being measured:
 Turn ALC ON
 Select the right frequency for the application of the device
 Select the right amplitude
Bias Current Isolation
Bias current isolation function can prevent DC current from affecting the test input circuit.
When the bias current isolation function is set as ON, the bias current flowing through DUT can
reach 100mA. When the bias current isolation function is set as OFF, the bias current value
allowed to flow through DUT is shown as Table 11.
DC
Resistance
of DUT
10 Ω
30 Ω
100 Ω
300 Ω
1 kΩ
3 kΩ
10 kΩ
30 Ω
100 kΩ
Max.
current
2 mA
2 mA
2 mA
2 mA
1 mA
300 µA
100 µA
30 µA
10 µA
Table 11 – Max. DC Bias Current
NOTE: If the level exceeds above ranges, this function will be automatically disabled.
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BK Precision 894 Specifications

General

Brand	BK Precision
Model	894
Category	Measuring Instruments
Language	English