M e r i d i a n I I U s e r M a n u a l
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C H A P T E R T W E L V E
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M e r i d i a n I I U s e r M a n u a l
F R O N T - P A N E L K E Y P A D A N D D I S P L A Y
Keypad EDIT Lockout
As a security feature, you can disable all editing processes done through the front-panel keypad. Do
this to prevent unauthorized modification of the instrument. When the EDIT key has been disabled, a
warning message will appear whenever a user tries to edit a parameter. To enable the lockout feature
use the
lockoutkp
command as described in
Chapter 3 - Console Port Control and Status
. The
lockout feature will prevent editing only, the displays are always available for viewing.
Using Help
Press HELP at any time to read the context-sensitive help messages. Use UP and DOWN to scroll
through the help message. Press the HELP key a second time to exit Help (or press BACK).
Shortcut Menu
The Shortcut Menu allows the user quick access to particular displays from the Time/Status display.
The displays available through the Shortcut Menu are the Receiver Status, GPS Reference Position,
Faults, and NTP Status. To select the Shortcut Menu, press ENTER for one second while viewing the
Time/Status display.
Detailed Display
Descriptions
Time/Status
The Time/Status display provides all the information necessary to determine that the instrument is
working correctly:
12 : 59 : 45
U
T
C
TFOM - 3
Sys Stat- OK
Jun 15, 2015 Receiver- LKD
Time-of-Day:
The large numeric digits shown on the left side of the display indicate the
current time-of-day.
Time Mode:
The indicator next to the time digits identifies the time mode as being UTC, GPS
or LOC (for Local time). If the user selects Local time in the 12-hour mode, an
AM or PM indicator will appear instead of LOC.
Date:
Current month, day and year.
TFOM:
A detailed explanation of TFOM is in
Appendix A - Time Figure-of-Merit
.
Briefly, TFOM indicates clock accuracy where:
3
time error is < 100 ns
4
time error is < 1 us
5
time error is < 10 us
6
time error is < 100 us
7
time error is < 1 ms
Summary of Contents for Meridian II
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