Hi @johnofleek,
Thanks for your feedback.
I had a look on those logs. As example, those timestamps below:
From logs WP7702gnss.nma
$GPRMC,095535.00,A,5306.408958,N,00201.504135,W,0.0,165.2,100619,4.5,W,A39
$GPGSV,3,1,10,12,28,085,31,14,31,246,32,25,68,082,30,26,14,274,227A
$GPGSV,3,2,10,29,68,175,31,31,54,289,33,32,19,227,45,02,29,057,79
$GPGSV,3,3,10,06,06,023,49,4040
From logs fx30sgnss.nma
$GPRMC,092646.0,A,5306.404553,N,00201.517146,W,0.0,0.0,100619,4.5,W,A04
$GPGSV,3,1,12,12,39.4,78.8,25.0,14,38.7,260.2,25.0,24,6.3,139.2,32.8,25,81.6,61.9,21.942
$GPGSV,3,2,12,29,54.8,185.6,32.1,31,42.9,298.1,24.6,32,30.9,236.2,34.5,49,27.4,170.2,34.37C
$GPGSV,3,3,12,02,30.9,71.7,03,2.8,326.3,06,14.8,32.3,26,3.5,268.6,7F
$GPGSV,3,1,12,12,39.4,78.8,25.0,14,38.7,260.2,25.0,24,6.3,139.2,32.8,25,81.6,61.9,21.942
$GPGSV,3,2,12,29,54.8,185.6,32.1,31,42.9,298.1,24.6,32,30.9,236.2,34.5,49,27.4,170.2,34.37C
$GPGSV,3,3,12,02,30.9,71.7,03,2.8,326.3,06,14.8,32.3,26,3.5,268.6,*7F
From logs WP7702gnss.nma, Satellites SNR (C/No) values are from 22 to 45 dB-Hz
From logs file named fx30sgnss.nma, Satellites SNR (C/No) values are from 21.9 to 34.5 dB-Hz
SNR values are different for some SVs, about 5 dB-Hz. It could be explained by test environment (indoor, obstructed view thru window) on different timestamps (about 30 min).
Nevertheless, SNR is similar for SVID 29, as shown below:
$GPGSV,3,2,10,29,68,175,31
$GPGSV,3,2,12,29,54.8,185.6,32.1
So it seems we cannot confirm that performance issue from those logs. Do you agree?
Moreover, I’ve got one FX30_WP8548, and tried it in “open sky” condition (roof top antenna). Results was as expected, ie. TTFF for “Cold start” is ~30 seconds.
Checking the Product Technical Specification document, those Devices have similar result with regard to TTFF performances.
I would recommend to compare those Devices in “open sky” environment, or same antenna connected to both Devices at the same time (using splitter and DC blocker for one of them).
Hope it helps !
Regards