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3.4. Timing 1PPS output
The 1PPS pulse width is 1 μs, this 1PPS is NOT suited to steer various oscillators
(timing receivers, telecommunications system, etc).
3.5. Sensitivity
3.6. Battery backup (SRAM/RTC backup)
During ‘Powered down’ condition, the SRAM and RTC (Real Time Clock may be kept
operation by supplying power from VBATT. The Leadtek 9101X GPS module can
accept slow VBATT supply rise time (unlike many other SiRFstarII based receivers) due
to an on-board voltage detector.
3.7. Differential aiding
3.7.1. Differential GPS (DGPS) Optional
DGPS specification improves the Leadtek 9101X GPS Module horizontal position
accuracy to <4M 2dRMS.
3.7.2. Satellite Based augmentation System (WASS/EGONS) Optional
The Leadtek 9101X GPS Module is capable of receive SBAS(WASS and EGONS)
differential corrections. SBAS improves horizontal position accuracy by correcting GPS
signal errors caused by ionospheric Disturbances, timing and satellite orbit errors.
Both SBAS and DGPS should improve position accuracy. However, other factors can
affect accuracy, such as GDOP, multipath, distance from DGPS reference station and
latency of corrections.