CMG-DM16
The screen shot below shows, from the top graph down, the off-
set, drift and pwm of a digitizer internal clock tracking and
homing-in on a GPS clock pulse over approximately a twelve
hour period.
The above graphical image was printed from a Guralp plot
module to demonstrate the effectivenes of digitizer clock
sychronisation and subsequently time stamped data.
16
Issue C
Offset or phase
error between
digitiser internal
1Hz and GPS
1pps.Closes in to
less than 5
s
Drift or frequency
error between
digitiser internal
clock and GPS
PWM – Pulse
Width Modulation
control signal
applied to a DtoA
to control internal
clock/GPS error
Summary of Contents for CMG-DM16R8
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