Stanford Research Systems SR844, User Manual

Page: 114 / 246

4-12 Signal Input
SR844 RF Lock-In Amplifier
Signal Input Commands
WRSV(?){i}
The
WRSV
command sets or queries the Wide Reserve Mode of the instrument.
The parameter
i
selects High Reserve (
i=0
), Normal (
i=1
), or Low Noise
(minimum wide reserve) (
i=2
).
AWRS
The
AWRS
command performs the Auto Wide Reserve function. This command is
the same as pressing Shift–WideReserveDown .
AWRS
automatically sets the
Wide Reserve Mode of the instrument to the minimum reserve without overload.
INPZ(?){i}
The
INPZ
command sets or queries the Signal Input impedance. The parameter
i
selects 50
Ω
(
i=0
) or 1 M
Ω
(
i=1
).