Clearing The Nvram; Use Receiver Keys To Clear Nvram - Topcon GB-500 Operator's Manual

Clearing the NVRAM

The receiver's Non-Volatile Random Access Memory
(NVRAM) holds data required for satellite tracking, such as
ephemeris data and receiver position. The NVRAM also keeps
the current receiver's settings, such as active antenna input,
elevation masks and recording interval, and information about
the receiver's internal file system.
Even though clearing the NVRAM is not a common (nor
normally a recommended) operation, there are times when
clearing the NVRAM can eliminate communication or tracking
problems. Clearing the NVRAM in your receiver can be
interpreted as a "soft boot" in your computer. Clearing the
NVRAM of your receiver will not delete any files already
recorded in your receiver's memory. However, it will reset your
receiver settings to factory default values.
After clearing the NVRAM, your receiver will require some
time to collect new ephemerides and almanacs (around 15
minutes). Note that after clearing the NVRAM, the receiver's
STAT LED will flash orange for a few seconds indicating that
the receiver is scanning and checking the file system.

Use Receiver Keys to Clear NVRAM

1. Press and release the power key to turn off the receiver.
2. Press and hold the REC key.
3. Press and hold the power key for about one second.
Release the power key while continuing to hold the
REC key.
4. Wait until the STAT and REC LEDs are green.
5. Wait until the STAT and REC LEDs blink orange.
6. Release the REC key while the STAT and REC LEDs
blink orange.
P/N 31-050506-01
Managing Data
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