Stanford Research Systems SR865A Operation Manual page 23

Chapter 1 Getting Started 5
Y, R, θ (detected), f , f , phase (setting), Sine Amplitude, DC Level, any Aux Input,
int ext
Aux Output 1 or 2, Xnoise, or Ynoise.
Displayed parameters can be re-assigned at any time. Data is being stored for all possible
parameters all of the time.
Info Bar and Numeric Entry
Each of the data screens always displays a lock-in info bar across the top.
This bar always shows tiles displaying the phase, frequency, detect harmonic, sine out
amplitude and dc offset of the sine out. Each of these parameters can be adjusted using
the knobs and buttons in the reference settings section of the front panel.
Touching one of these tiles brings up a numeric keypad for direct entry.
Internal frequency entry screen
Numeric entry is straightforward. {Close} will return to the data screen. The buttons
{F1}, {F2}, {F3} and {F4} are frequency presets. Touching a preset will load the preset
value immediately. Touch and hold a preset button to memorize the current setting. Other
parameters may have slightly different entry screens.
Strip Charts
The most common way to visualize the lock-in outputs is to use the strip chart display.
New data is plotted at the right edge and older data scrolls left. The scroll rate is
determined by the horizontal scale (time per division). For example, a scale of 1s/div
presents the 10 most recent seconds of data and data points take 10 s to scroll completely
off the left edge. Horizontal scales range from 0.5 s to 2 days per division.
At each point along the horizontal axis, the graph displays the maximum to minimum
excursion of each data channel during a time interval corresponding to that point in the
SR865A DSP Lock-in Amplifier