Specifications

5.14 DC bias current enhancement
DC current biasing is used for inductor and transformer measurement. In the low frequency region,
the E4980A or 4284A precision LCR meter with the 42841A bias current source are both suitable for
this application because they can apply up to 20 A of bias current. (This can be extended up to 40 A
if two 42841As are connected in parallel.)
To deliver a bias current in RF impedance measurement, the 16200B external DC bias adapter can
be used with the RF I-V measurement instrument. The 16200B allows you to supply a bias current of
up to 5 A across the DUT by using an external DC current source. The 16200B is directly attached to
the 7-mm test port and the test fixture onto the 16200B as shown in Figure 5-47. To minimize the
bias adapter-induced errors, perform open/short/load calibration at the test fixture terminals with
no bias voltage/current applied.
Figure 5-47. External DC bias measurement using the RF I-V measurement instrument
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