6
Front and Rear Panels
LEARN (1201B/C)
: Illuminates orange when clock is finding its position and stabilizing:
approximately 24 hrs. GNSS anti-spoofing is not active.
SURVEY (1200B)
: Illuminates orange when clock is finding its position and stabilizing.
NORMAL (1201B/C)
: Illuminates green when the clock is operating in normal mode, and follows
after the learn mode inactive; the learn LED will be off, and GNSS anti-spoofing is active.
NORMAL (1200B)
: Illuminates green when the clock is operating in normal mode, and follows
after the learn mode inactive; the survey LED will be off.
UNLOCKED
: Illuminates red when the clock has not yet synchronized, or has lost synchro-
nization, with the GNSS.
ALARM
: Illuminates red when an alarm has been activated.
OPERATE
: Illuminates green when the clock is operating.
POWER A
: Illuminates green when power supply A is providing power to the clock.
POWER B
: Illuminates green when power supply B is providing power to the clock.
FAULT
: Illuminates red when one of the faults
has been activated.
2.2.3
LCD Display
The Model 1200B, Model 1201B and Model 1201C all have an LED backlit liquid crystal display
(LCD), which provides a 20-character by 2-line readout. The readout displays instrument status,
time, date, and event data.
If configured to do so, the readout may also display the current
configuration of operating parameters.
2.2.4
Large LED Display: Model 1201C
The Model 1201C adds a six-character, 20 millimeter (0.8 inch) LED time and date display. The
LED display can indicate the local or UTC time, in hours, minutes, and seconds. Pressing the
TIME/DATE
key will also display the date format as MM/DD/YY or DD.MM.YY. Configure this
date format from front panel or through the serial port.
2.3
Rear Panel Identification and Connectors
This section contains information to assist you in identifying the location of the inlet power, the
GNSS antenna cable, and all of the input and output connections on the clock. Connection details
are in Chapter 3.
B1234
Arb
it
e
r Sy
st
e
m
s
Serial Number
Made in USA
ANTENNA
FIBER
COM1
RELAY
COM2
INTERNAL OPTION SPACE
POWER B
POWER A
1
I/O PORTS
2
3
ANTENNA
STATUS
Figure 2.3: Model 1200B and Model 1201B/C Rear Panel Description
1
see Fault Indications on page 29.