The PMA-11 is a spectral analyzer that integrates a spectrograph and high performance multi-channel photodetector in a single compact chassis. Light collection is simplified through the use of optical fiber. The diffraction grating of the spectrograph and multichannel photodetector are rigidly fixed, resulting in excellent wavelength reproducibility. The wavelength axis and spectral response characteristics are calibrated at the factory, so that spectral measurements can be carried out easily and accurately. The PMA-11 series offers four different multi-channel photo-detectors to choose from, for additional flexibility in grating selection, allowing the user to optimize the performance for the application at hand. Equipped with a standard SCSI interface, the PMA-11 is easily connected to any type of computer for data collection and analysis.