15
The Front Panel Layout
FAIL LED
The FAIL LED is turned on whenever the TIME_SYN
output is low (receiver is not synchronized).
LOCK LED
The LOCK LED is turned on when after power-up the
receiver has acquired at least four satellites and has compu-
ted its position. In normal operation the receiver position is
updated continuously as long as at least four satellites can
be received. When the receivers position is known and
steady only a single satellite needs to be received to syn-
chronize and generate output pulses.
BSL Button
Whenever the on-board software must be upgraded or modified, the new firmware can
be downloaded to the internal flash memory via the serial port COM0. There is no need
to open the metal case and insert a new EPROM.
If the BSL pushbutton behind the front panel is pressed while the system is powered
up, a bootstrap-loader is actived and waits for instructions from the serial port COM0.
The new firmware can be sent to GPS167SV from any standard PC with serial interface.
A loader program will be shipped together with the file containing the image of the new
firmware.
The contents of the program memory will not be modified until the loader program has
sent the command to erase the flash memory. So if the BSL pushbutton is pressed
unintentionally while the system is powered up, the firmware will not be changed
accidentially. After the next power-up, the system will be ready to operate again.
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Содержание GPS167SV
Страница 1: ...Incl Windows Software GPSMON32 GPS167SV Technical Information Operating Instructions ...
Страница 30: ...30 ...
Страница 32: ...32 IRIG Standard Format x 3x TYPICAL MODULATED CARRIER IRIG A 10000 Hz IRIB B 1000 Hz binary 0 binary 1 ...
Страница 33: ...33 AFNOR Standard Format ...
Страница 40: ...40 ...
Страница 43: ...43 Diskette with Windows Software GPSMON32 ...
Страница 44: ...GP S 1 6 7 S V E 0 5 0 5 0 6 ...