Quectel LG77L EVB, Руководство пользователя

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GNSS Module Series
LG77L EVB User Guide
LG77L_EVB_User_Guide 17 / 28
5.2. PMTK Command Sending
The PowerGPS supports sending PMTK commands to control the module as shown in the figure below,
The PMTK command format includes only characters between
‘$’ and ‘*’, for example:
PMTK869,0 . The
checksum will be calculated and added automatically to complete the full NMEA format message.

PRN G28 carrier-to-noise ratio (CNR) is 49 dB/Hz.

G stands for a GPS satellite, B for a BeiDou satellite, and S
for an SBAS satellite.

Light blue column means that the navigation data of the
satellite is in use.

PRN B3 CNR is 42 dB/Hz.

White column indicates that the navigation data of this satellite
is not in use.
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UTC time
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Latitude degree
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Longitude degree

Position fix

The number of satellites being used

Horizontal dilution of precision

Altitude based on WGS84 datum

UTC date

Fixing mode: No-fix, 3D or 2D SPS

Satellite being used

Position dilution of precision

Vertical dilution of precision

Receiver speed