User`s guide

202 Chapter 8

GPS Modulation (Option 409)

Real Time MSGPS

In Real Time MSGPS mode, selectable scenario files define simulated multiple-satellite conditions. The

E8267D generates a signal (C/A code only) simulating multiple satellite transmissions from the information

in the selected scenario file. MSGPS signal generation capabilities include:

• selectable MSGPS scenario files that include the following information:

— simulated location (city, latitude, longitude, elevation)

— simulated date and time

— scenario duration

— satellite IDs present (in view) in the scenario

• pause and resume function for the currently playing scenario

• restart function that sets the currently playing scenario to the beginning 

(without turning off the RF output)

• adjustable number of satellites in view to include in the generated signal

• selectable internal or external chip clock reference source

• adjustable chip clock reference (10.23 Mcps  10%)

• selectable I/Q phase (normal or inverted)