34
Startup and Operation
the UP or DOWN keys. If there are no records, the second line will indicate “NO DATA”. If
configured for 1 PPS deviation, it will indicate the mean and sigma of 16 successive values. For
additional detail, please see Section 10.2.1.
Event Display
Press the TIMING key until reaching EVENT/DEVIATION, then press ENTER. Use the UP or
DOWN keys to scroll through the available event records. Events are displayed as follows:
Ch A EVENT nn
ddd:hh:ss.sssssss
Where:
nn
= event number (01 to 50),
ddd
= day of year of the event (001 to 366)
hh
= hour of the event (0 to 23),
mm
= minute of the event (0 to 59)
ss.sssssss
= second and fractional seconds of the event
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.The first display indication is the clock serial number and
firmware version.
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 Model 1201B/C may have one or two power supplies: Power Supply A and Power Supply B.
If the clock has one power supply, it will be in position A and power supply B (PSB) voltage will
be indicated by dashes.
POWER SUPPLY STATUS
PSA: 24.3V PSB: ----
Summary of Contents for 1201B
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Page 153: ...B 7 Four Fiber Optic Outputs 135 Figure B 4 Jumper Locations ...