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SPSx51 Modular GPS Receivers User Guide 115
Specifications 10
Variable configuration options
This table lists the default options for each receiver in the SPSx51 Modular GPS
receiver family.
Upgrading the receiver
You can upgrade the following receivers:
• SPS751 Basic base or SPS751 Basic rover to the SPS751 Max.
The upgrade changes all standard options to SPS751 Max capability, and
includes the radio option upgrade.
• The SPS551, SPS551H, and SPS651 can be upgraded with GLONASS and/or L2C.
• The SPS851 can be upgraded with GLONASS and/or L5.
• The SPSx51 with 450 MH UHF internal radios can be upgraded to 2 W
transmission power if it is legally allowed in its country of use.
• The SPS751 Max and SPS851 can be upgraded to allow internal data logging.
When you purchase the receiver upgrade, your Trimble dealer will provide you with a
set of codes to change the receiver configuration. See also Appendix F, Upgrading the
Receiver Firmware.
Configuration
option
SPS551 SPS551H SPS651 SPS751
Basic
base
SPS751
Basic
rover
SPS751
Max
SPS851
Rover options
Precise horizontal –
–––
999
Precise vertical
––
9
–
999
Precise heading/vector
999
––
99
Location RTK
9 – 9
–– – –
RTCM DGPS
9 – 9
–
999
RTK range limit
–
2.4 km
– – 2.4 km None None
Base options
Static RTK –
––
9
–
99
Moving Base
999
––
99
RTCM DGPS
9 – 99
–
99
General options
Data logging – – – – – Optional Optional
VRS support Location
–
Location – –
99
Max data rate 10 Hz 10 Hz 10 Hz 2 Hz 2 Hz 10 Hz 20 Hz