Reference Commands - Stanford Research Systems SR860 Operation Manual

106 Programming

Reference Commands

TBMODE(?) { AUTO | INternal | i }
The TBMODE i
internal (i=1).
Example
TBMODE AUTO
TBMODE 0
TBMODE?
TBSTAT?
The
TBSTAT?
internal (1).
Example
TBSTAT?
PHAS(?) { p } { UDEG | MDEG | DEG | URAD | MRAD | RAD }
The
PHAS p
with a resolution of ~0.0000001°. The phase may be programmed from
−360000° ≤ p ≤ 360000° and will be wrapped around at ±180°. For example, the
PHAS 541.0
−179). Phase may be specified in degrees (default), or millidegrees, microdegrees,
radians, milliradians, or microradians.
Example
PHAS 12.34 DEG
PHAS 1.234E1
PHAS 12340 MDEG
PHAS?
APHS
The APHS
pressing the [Auto Phase] key. The outputs will take many time constants to reach their
new values. Do not send the command again without waiting the appropriate amount of
time.
FREQ(?) { f } { HZ | KHZ | MHZ }
The FREQ f
digits or 0.1 mHz, whichever is greater. The value of f is limited to 1 mHz ≤ f ≤ 500 kHz.
The query form,
mode is either Internal, Dual, or Chop. The query returns the external frequency when
operating in External mode. This behavior mirrors the value displayed in the info bar at
the top of the display.
SR860 DSP Lock-in Amplifier
command sets the external 10 MHz timebase mode to auto (i=0) or
Set the timebase mode to auto
Returns the timebase mode i
query returns the current 10 MHz timebase source, either external (0) or
Returns the current 10 MHz timebase
command sets the reference phase shift to p degrees. The value of p is set
command will set the phase to −179.00° (541−360 = 181; 181−360 =
Set the reference phase to 12.34 deg
Returns the reference phase in degrees
command performs the Auto Phase function. This command is the same as
command sets the internal frequency to f. The value of f will be rounded to 6
FREQ? , returns the internal reference frequency whenever the reference
Chapter 4