The toolbar “Acquire” tab for the StellarPro software consists of three sub-blocks.

  1. Acquisition Mode and Basic Tools: This block includes options for selecting the acquisition mode, such as single or continuous reading. It also provides basic tools like saving and opening data.
  2. Spectrometer or Device Settings: In this block, you can find settings related to the spectrometer or device, such as integration time, wavelength range, etc. These settings allow you to configure the specific parameters of the device for data acquisition.
  3. Dark and Light References: The third block is dedicated to dark and light references. Here, you can perform actions related to establishing dark and light references, which are important for accurate measurements. These references help in calibrating and correcting the acquired data.

Please note that the app settings may vary for different applications. For specific details on the app settings, please refer to the individual app sections within the software, as each application may have its own unique settings and configurations.

Acquisition and Basic tools (Block 1)

Scope Current Selected Application
Save Data  

  • Click to save the data
  • Save parameters are located in the Setting (in navigation bar)

File open  

  • Click to open the saved spectrum file. 
  • Note: Only files supported by the current application will open in the graph window.
Share Data

  • Open mail client, if available.
Print PDF

  • A PDF report, the same PDF report as the save data, will be generated and printed using the default printer, if the default printer is available.
Capture Mode

  • Single: Single capture of the spectrum.
  • Loop: Continuously capturing the spectrum.
  • Epsiodics: Collect spectral data over time.
  • Select the desired capture mode and click to  start the capture process.
Plot Scale

  • DEFAULT: Default to minimum and maximum scale based on the graph type. i.e. 0 to 65535 for the scope.
  • CUSTOM: Triggered by moving/dragging on the plot to a specific scale.
  • AUTO: Auto scale X-axis and Y-axis. Can also be triggered by a double click on the plot.
Peak Finder Arrows

  • Clicking on the left or right peak finder button will display the cursor on the graph and trigger the algorithm to find the next closest peak in the corresponding direction (left or right). Additionally, it will provide additional information such as the Centroid, Full Width at Half Maximum (FWHM), and Power Spectral Density (PSD) of the identified peak.


Device Settings (Block 2)

Device Selection

  • Click the dropdown arrow to select the spectrometer to operate. 
  • Hover over the information icon to view for selected spectrometer coefficient and total pixel count.
Reconnect the spectrometer(s)

  • Plug in the spectrometer(s) or connect to the zAP2 network, then click on this icon to connect all the available spectrometers.
  • All the connected spectrometers will be listed in the Device selection dropdown list.
Auto Set

  • Left Click to automatically adjust detector integration time and averaging using reference light source in scope mode.
  •  Adjusting the integration time manually is recommended if a high integration time is needed.
Unit Calibration (Not Available for Administrator and User)

  • Factory Settings
Set Integration Time

  • This should be adjusted for each experiment to maximize the detector output and signal to noise ratio. Configured integration time is reported in the status bar message at the bottom of the screen (as Time: xx milliseconds
  • Enter the desired value in the textfield.
  • During the “Loop” capturing, adjusting the integration time will be automatically implemented without the need to click on the “Integration Time*
  • The unimplemented integration time will appear as red text. Click on the “Integration Time*” button to apply the setting, and a capture of the spectrum will happen automatically to clean up the data for the next capture.

* Recapture the dark/reference is needed after adjusting the integration time.

Set the number of spectra to signal average. 

Please note that the real-time display is updated AFTER these numbers of spectra have been acquired. This option provides a smoothing in the Y-axis, effectively increasing the system signal to noise by the square root of the number of scans being averaged. Set the averaging to the highest number tolerable when there is sufficient light signal and the detector integration time is short.

Set Smoothing. 

X axis smoothing improves S/N ratio. 

0 = No Smooth. 

1 = Smooth window of 5. 

2 = Smooth window of 9. 

3 = Smooth window of 17. 

4 = Smooth window of 33

XTiming resolution control

  • Click and drag the slider left or right to adjust the XTiming.
  • During the “Loop” capturing, adjusting the XTiming will be automatically implemented without the need to click on the “XTiming” button.’
  • The unimplemented XTiming will appear as red text. Click on the “XTiming” button to apply the setting, and a capture of the spectrum will happen automatically to clean up the data for the next capture.

1 = The lowest optical resolution and is synchronized with the selected detector integration

2 = Slows the digitizer and detector clock by a factor of 2.

3 = Slows the digitizer and detector clock by a factor of 4

* XTiming should remain set to 3 unless integration times go below 10ms. 

* Recapture the dark/reference after adjusting the XTiming

Temperature Compensation: The first 15 “optical black” pixels that are read from the detector provide a useful level of the sensor dark current even when the detector is illuminated. If this option is on, the system periodically samples this area and makes an adjustment to the normal readout. When the level raises or lowers with temperature, the scan is adjusted accordingly. 

  • Fill the checkbox to enable the temperature compensation.
External Trigger: Turn on the external trigger is on (checked), the program will not time out if no signal is received from the spectrometer.

  • Fill the checkbox when using a hardware trigger.
Gain Adjustment(Select between 5 pre defined gain values for spectrometer amplifier)

  • Range from g1-g5 level with ascending gain values
  • Only available for zAP spectrometers .
Baseline Adjustment(Adjust spectrometer offset by changing digital potentiometer )

  • Press down arrow to decrease the baseline by 20%
  • Press up arrow to increase the baseline by 20%
  • Only available for zAP spectrometers .

App Settings (Block 3)

View App Settings in the desired application section.

Dark / Light Reference (Block 4)

Take Dark – Dark reference saves a snapshot raw spectrum data as the dark reference spectrum and subtracts this data from subsequent spectra. This data is also considered 0% for %T:R and Absorbance mode calculations. This button will toggle between Dark Captured and Dark Released. See the tooltip for the time of the last capture/release. 

Dark Captured Dark Released
  • Left Click on the lightbulb icon to capture the dark after turning OFF light source. The captured dark will be stored and reloaded for the same spectrometer next time. Left clicking again will overwrite the previous dark.
  • Right Click to release previous dark (zero).
Take Reference – Reference saves a snapshot raw spectrum as the reference spectrum and calculates that data as a 100% reference for subsequent spectra in %T:R and Absorbance mode calculations