Optical Spectrum Analyzers Chapter 4: Description
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back panel’s interlock jack in place of the shorting device. The electrical specifications of the interlock jack are
listed in Section 11.6 Interlock Specifications (Redstone OSA305 only).
Note that the Redstone OSA305 requires the reference laser source to collect accurate interferograms; hence,
with the Interlock unplugged, the instrument is disabled.
Further, the sole output for the reference laser is the Calibration output fiber port on the front of the instrument.