INPut{1|2}:PROTection?
Syntax
INPut[{1|2}]:PROTection?
Description
This query returns whether the 50 ohm termination protection relay has opened due to an input voltage
overload when 50 ohm input impedance is selected.
Remarks
l INPut or INPut1 refers to channel 1; INPut2 to channel 2.
l When 50 ohms is selected, the maximum input voltage allowed is ±5.125 Vpk. If the input voltage
exceeds ~±10 Vpk, which would damage the 50 ohm terminator, a protection relay will open, changing
the actual input impedance to 1 Mohm. If this occurs, the INPut{1|2}:PROTection:CLEar command can
be sent to reset the protection relay.
l The Voltage Overload bit in the Questionable Data Status Register will be set an input voltage overload
causes the protection relay to open. The bit is cleared by sending the INPut{1|2}:PROTection:CLEar
command to the affected channel, or by setting the affected channel's input impedance to 1 MOhm
(INPut{1|2}:IMPedance command).
Return Format
The query returns the current protection relay state: 0 (relay is closed) or 1 (relay has opened).
Examples
The following example queries the input protection on channel 1.
INP1:PROT?
Typical Response: 0
See Also
INPut{1|2}:IMPedance
INPut{1|2}:PROTection:CLEar
INPut{1|2}:PROTection?
220 Keysight 53220A/53230A Programmer's Reference
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