Customer Service Center
Spirent KB Article
Doc ID: FAQ13978
Email Article Link
SimCHAN: GSS6300M: Can the GSS6300M be used for AWGN and GPS Time Assistance Tests?
SimCHAN v3-00 onwards
AGPS Testing that requires specific conditions for
Power level settings
GPS Time Assistance
The power level sliders in the SimCHAN GUI set the power for all satellites of the same type.
This means you can’t set different power levels on different satellites of the same type.
Instead use remote command =
explained in the software user manual,
DOP (Start Time / Vehicle Position / Satellite Constellation)
To achieve the HDOP requirements the satellite constellation, vehicle position and scenario start time must be carefully chosen.
The vehicle position and start time can be set in the SimCHAN GUI
The constellation can be loaded via a Yuma file
However, SimCHAN does not offer any data output to allow you to see the resulting HDOP that is being achieved.
The user would have to determine some other method, of their own devise, to work out how the chosen configuration affects the HDOP
A GSS6300M Special Scenario could be requested to assist in achieving the correct DOP
If AWGN simply requires consideration of background noise level, this is dominated by thermal noise and is replicated by the simulator RF output (see article
Additional interference effects, perhaps like multipath and/or obscurations are not directly supported with SimCHAN
A GSS6300M Special Scenario could be requested to assist in creating a scenario with multipath or obscuration effects
GPS TIME ASSISTANCE
“GPS time assistance accuracy” requires assistance data from a third-party source
The GSS6300M and SimCHAN are not capable of providing this test parameter directly.
Product : SimCHAN,Positioning,GSS6300M