211) If the target sentence mode is ‘2’ (disable all) or ‘3’(enable all), the target sentence description is notchecked for validity. In this case, an empty field isallowed (e.g., $PGRMO,,3), or the mode field maycontain from 1 to 5 characters.2) If the target sentence mode is ‘0’ (disable) or ‘1’(enable), the target sentence description field mustbe an identifier for one of the sentences being outputby the GPS 35/36.3) If either the target sentence mode field or the targetsentence description field is not valid, the PGRMOsentence will have no effect.4) $PGRMO,GPLAM,1 will cause the sensor board totransmit all stored almanac information. All otherNMEA sentence transmission will be temporarilysuspended.4.2 NMEA TRANSMITTED SENTENCESThe subsequent paragraphs define the sentences whichcan be transmitted on TXD1 by the GPS 35/36.4.2.1 Sentence Transmission RateSentences are transmitted with respect to the user selectedbaud rate.The GPS 35/36 will transmit each sentence (except wherenoted in particular transmitted sentence descriptions) at aperiodic rate based on the user selected baud rate and userselected output sentences. The GPS 35/36 will transmit theselected sentences contiguously. The contiguoustransmission starts at a GPS second boundary. The lengthof the transmission can be determined by the followingequation and tables: