EndRun Sonoma D12, User Manual

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S o n o m a U s e r M a n u a l 60
C H A P T E R S E V E N
61 S o n o m a U s e r M a n u a l
H T T P S I N T E R F A C E
Channel Set This shows the current channelset being used by the CDMA Receiver. It could
be North America Cellular, Korea Cellular, North American PCS, India Cellular
and Japan Cellular.
Receiver: Oscillator Page
This page shows CDMA Subsystem oscillator control information such as:
Oscillator Status
Oscillator Type This field shows the system oscillator type that is installed in the Sonoma. It
will be either TCXO (standard), OCXO (option) or Rubidium (option).
DAC The system oscillator control DAC value indicates the frequency control setting.
The system automatically sets this value to remove frequency errors. Values
may range from 0 to 1,048,575. Values close to the minimum or maximum will
set the DAC fault flag.
Measured Time This field shows the the last measured time offset of the CDMA Subsystem to
Error CDMA while locked, in seconds.
Time Deviation This field shows the time deviation (TDEV) of the offset measurements in
seconds. The tau associated with this measurement is one second, which is the
update interval of the position fixes received from the CDMA Receiver.
Oscillator Ageing This field shows the regression-computed system oscillator ageing rate per day
Rate (several-hour delay before the first measurements are displayed).
Control Loop TAU This field shows the oscillator control loop averaging time constant, in seconds.
It’s value is automatically adjusted to maintain optimum system clock offset and
stability.
Coast Duration This shows the number of seconds the CDMA Subsystem has been in coast
mode, while the Sonoma is unlocked to CDMA. Coast mode is another term for
holdover mode.
Estimated Time This is the estimated time error of the CDMA Subsystem when in coast mode,
Error in seconds.
Internal Chassis Internal chassis temperature in °C. Available with OCXO or Rubidium
Temperature oscillators.
Clock Page
This page shows the configuration of the clock or timekeeping parameters. Fields are:
Clock Configuration
Time Mode This field shows the current time mode setting. Possible settings are UTC, GPS
Local-Manual and Local-Auto. Since NTP always uses UTC, this setting
only affects the front-panel display and any optional Time Code or Serial Time