The invention relates to a method for correcting an IQ-imbalance of an IQ-based direct conversion receiver. An optical directing device is provided that directs a respective portion of each light beam onto an incoupling means, which couples each of the light beams into the illuminating light beam of the microscope-based system and directs the light beams onto a specimen. A bolt is inserted through the throughhole and screwed into the female thread. The separate safety pocket protects the smart phone from scratches from coins and keys. If the draw parameter call value is not the same as the drawing resource value, then a new drawing resource is created in the managed code portion. The base station can include a contact profile data store, a location signal receiver, a base station controller, and a notification signal transmitter.