Connect the measurement accessories to the E4990A.
Press the standby switch on the front panel of the E4990A to turn it on.
Press Cal > Accessory or Instr Setup > Accessory to select the accessories for measurement.
Whenever you connect accessories to or disconnect accessories from the E4990A, you must turn off the dc bias (Sweep Setup > DC Bias State). If this step is not taken, the dc bias may destroy the device.
When you connect or disconnect accessories with the E4990A turned on, error messages such as "Z measurement overload" may be displayed on the LCD screen. However, this does not cause any special problem. To turn off the messages, press Entry Off.