User's Manual

SECTION 4: FACTORY TEST PROCEDURE
M64700G25-FCCRpt.doc Page 33
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Downlink Hardware Timing Verification
The figure below displays a plot of the downlink timing characteristics. Channel 1 is connected to RSSI,
channel 2 is connected to recovered audio, and channel 3 is connected to the modem CS pin. The scope
is in the high-resolution acquisition mode.
There is a very short period of quiet time (no modulation) followed by approximately 12 milliseconds of
modem synchronization time (sync time).