Posted 3/4/2014 15:07 (#3732619 - in reply to #3732522) Subject: RE: How accurate is a 750 with RTK without it's modem?
The Ez-Guide 500 would have come with an Ag-15 Antenna, which is single frequency only, and won't work on RTK. The 750 would have come with a dual frequency Ag-25.
When a HP unlock is purchased for the 500, you will also get an Ag-25 as part of the unlock.