An overload detection and Power Trip function is a safety feature to protect your E5061B from over-input. When an overload is detected, the measurement is aborted and the settings are changed as shown below, then the "Ovld Protection" is displayed on the instrument status bar.
RF Out : OFF
Port Coupling: AC (Refer to Critical Information)
DC Bias: OFF
Gain-Phase Input Attenuator: 20 dB
Gain-Phase Input Impedance: 1 MΩ (Refer to Critical Information)
The softkey labels which setting have been affected have (Protected) sign (e.g. RF OUT / OFF (Protected)).
The overload occurs when DC current or RF power is over:
Ports 1 and 2: 40 mAdc
Ports R and T (Gain-Phase): 100 mAdc
Ports 1 and 2: +16 dBm (at measurement frequency)
When the overload occurs, remove the cause of the over-input. Then press System > Overload Recovery > Clear Overload Protection. This softkey is not only to clear the protection status but also to set the former setting before you have overload.
The softkeys under System > Overload Recovery menu is identical with the same label softkeys under the other menu. For example, System > Overload Recovery > RF Out is identical with Sweep Setup > Power > RF Out. These softkeys help you to see the setting at a glance.
If changing the setting, such as attenuator: 0dB, causes overload, you can observe which setting have been changed and change them quickly at the softkeys under System > Overload Recovery. Changing the setting also clears the protection status.
RF Out : OFF
RF Port Impedance : short (Refer to Critical Information)
The softkey labels which setting have been affected have (Protected) sign (e.g. RF OUT / OFF (Protected)).
The overload occurs when RF power is over:
Port 1 and 2
approximately +16 dBm (at measurement frequency)
approximately +30 dBm +/- 4 dB (at other frequency)
When the overload occurs, remove the cause of the over-input. Then press System > Overload Recovery > Clear Overload Protection. Or press System > Overload Recovery > RF Out is identical with Sweep Setup > Power > RF Out.