Leica MX400 Operating Instructions Manual page 195

Operator's Manual
3: the receiver channel found the correct carrier for the
4: the receiver channel is decoding the navigation data from
Column 3 & 7:
Receiver status = -1 or 1: represents the amount of time the
Receiver status = 2: The oscillator value begins adjusting to
Receiver status = 3 & 4: The displayed value changes to the
Column 4 & 8: represents the current oscillator offset for the
given receiver channel. A wide range of values are possible
and normal. These values will also change as you and the
satellites move to maintain a lock on the center frequency of
the satellite carrier.
182
satellite identified, and is collecting the satellite
ephemeris. A new ephemeris is collected once a
satellite is first acquired and once an hour thereafter.
the satellite.
receiver channel has been using a particular oscillator
offset, when a 2 digit value is displayed. After about 10
to 30 seconds, depending on the receiver mode, the
timer resets to 0, and another oscillator offset is used to
find a carrier. This procedure is followed until a GPS
carrier is found.
If the receiver was tracking satellites and has since
dropped one or all of them, the value displayed is the
channel time which is maintained by the receiver
processor. As more time passes between tracking the
satellites, more error is introduced into this time. It is
not unusual to see several seconds of separation
between channel times in this mode. This will be
corrected when a satellite is picked up, and the receiver
reverts to mode 3 or 4.
the center frequency of the carrier, but the counter
continues to run.
channel time of the receiver. All receiver channels with
a mode of 3 or 4 should have the same channel time.
The channel time is a clock that is recovered from the
satellite and used to make navigation range measure-
ments.
Appendix C - Engineering Mode
Version 3.3