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TIMING STATUS PANEL
Timing Mode
Static: Indicates that the receiver is in static timing mode. In this mode, the receiver assumes that
the values it currently has for position and altitude are correct, and derives precise time using
these position coordinates.
Dynamic: This mode is provided for users on a moving platform or who are starting from an
unknown position. In this mode, the GPS receiver derives precise time information using the
current position solution.
Clicking on the field will access the Timing Mode screen which will allow you to change timing
modes.
Oscillator Mode
1-5: Indicates the current oscillator tuning algorithm mode. Modes are described on page 12 of
this manual.
User Time Bias
±99,999: Indicates the current value of user time bias in nanoseconds. Clicking on this field will
access the User Time Bias screen which will allow you to set the user time bias.
ALARMS AND INDICATORS PANEL
Time Valid
Off: Time is not yet valid, or has become invalid.
Blue: The TM-4 has obtained valid time information from GPS, and the following functions (if
incorporated) have been enabled: 1PPS output, ASCII serial time message, Programmed Output
Pulse, Event Time Tag, multiplexed frequency synthesizer outputs, IRIG B serial time code
output, filtered timing pulse and auxiliary frequency output.
Reference Ready
Off: The unit has not yet achieved minimum accuracy levels.
Blue: The unit has reached minimum accuracy levels of 1 x 10-9 and is in Fine Tuning (Mode 4)
mode.
ETT Status
Off: ETT is not activated.
Orange: ETT is activated, but no events have been detected.
Green: ETT events have been detected.
Antenna Fault
Off: Antenna circuits are operating normally.
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