It is known that GPS satellites transmit information in the frequency 1575.42MHz MHz while GLONASS satellites transmit information at the some other 1602.0 MHz.
How come most GNSS module makers say their modules receiving frequency is 1575.42MHz in the specification sheet?
In that case, even though their module supports GLONASS how could it view/read from those satellites when the antenna cannot pick up info sent by GLONASS Satellites?
For examples check these leading manufacturers
http://www.linxtechnologies.com/en/products/gps-modules/tm-gnss-receiver This module claims to support GLONASS but its suported frequency is 1575.42MHz. So in that case how do we know even by inserting a GLONASS supported antenna, this module will fully make use of it?
Dont we have to use antennas that capture both GLONASS and GPS frequencies with such modules?
Im sorry if the answer is too obvious but these vendors are really confusing us, beginners.