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Doc ID: FAQ14116
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Positioning Application: Why is the GPS minimum received power level -130dBm and not -128.5dBm as per the IS-GPS-200 ?
PosApp (SimGEN, SimREPLAY, SimREPLAY+)
Spirent simulators were originally designed using the
for further details).
The STANAG stated that the minimum received signal strength for
GPS L1 C/A
code would be
Spirents GPS simulators were designed to use this as the reference level for all signals.
states that the minimum received level for GPS L1 CA is
-158.8 dBW (-128.5dBm)
This because the satellites had a higher transmit power level.
Spirent did not change the software power levels to reflect this as it would effect all existing customers who had scenarios which referenced -130dBm.
Spirent intend to maintain the reference level for GPS L1 CA as -130dBm for all future software versions.
Product : SimPLEX,SimREPLAYplus,SimREPLAY,SimGEN,PosApp,GPS