6.6 System Key Displays
29
Deviation Display
If DEVIATION is selected, press the TIMING key until reaching EVENT/DEVIATION, then press
ENTER. Values are continuously updated each second (dashes show no input):
1 PPS:
---
µ
S
SIGMA:
---
µ
S
6.6
System Key Displays
Press the
SYSTEM
key to review the clock identity and systems that support accurate and stable
timing. These include clock serial number, firmware version, power supply voltages, EEPROM,
faults, and installed option board status.
6.6.1
Serial Number and Firmware Date
The first display indication indicates the clock serial number and firmware version.
S/N:
C00101
VERSION: 00.01
6.6.2
Power Supply
The clock may have one or two power supplies: Power Supply A and Power Supply B. A single
power supply will be in position A and power supply B (PSB) voltage will show by dashes.
POWER SUPPLY STATUS
PSA: 24.3V PSB: ----
6.6.3
EEPROM Errors
If the number of corrected (CORR.) errors begins to climb, contact the factory about replacing the
EEPROM.
EEPROM STATUS
CORR. ERRORS = 0
6.6.4
Fault Indications
If a fault occurs and the FAULT LED illuminates, the clock is unreliable and the Time Quality
value on the IRIG-B message is set to maximum (i.e. poorest quality).
FAULT NONE
Indicates no fault - normal operation.
FAULT: ANT. OPEN
4.96 V,
0 mA
Indicates an antenna fault with current at zero milliamperes. This fault disappears if antenna
connection is restored.