HP ESA-E Series - Input Subsystem; Input Port Coupling; Clear the Input Overload

Chapter 5 5-55
Language Reference
INPut Subsystem
INPut Subsystem
The INPut subsystem controls the characteristics of analyzer input
ports.
Input Port Coupling
:INPut:COUPling AC|DC
:INPut:COUPling?
Selects AC or DC coupling for the front panel INPUT port. A blocking
capacitor is switched in for the AC mode.
CAUTION Instrument damage can occur if there is a DC voltage present at the
INPUT and DC coupling is selected.
Factory Preset
and *RST: AC
Remarks: This command is available only on HP ESA spectrum
analyzer models E4404B or E4405B.
Front Panel
Access:
Input, Coupling AC DC
Clear the Input Overload
:INPut:PROTection:CLEar
Resets the overload protection circuitry for the input connector. There is
no query form of this command.
NOTE This command is valid only for HP ESA models E4401B and E4411B.
The excessive input signal may have caused 15 dB of attenuation to be
switched in, or it may have completely switched the input connector out
so that it is connected to the internal reference signal.