Involvement:Expert (understands the inner workings) - Ownership:more than 1 month
If you grab the SiRF Demo application, you can adjust what is send and how often. For example, I found that if I only enabled the RMC and GGA it reduced the amount of processing required to get the info I wanted (I am using TinyGPS with an arduino, and those are the only 2 TinyGPS uses). Looking at the options available, you may be able to increase the reporting above 1Hz.
In order to change the strings sent, Use the "Switch to SiRF protocol" and switch Back to NMEA. This site is helpful: http://www.gpspassion.com/forumsen/topic.asp?TOPIC_ID=25575
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