Model: MC-1-M (2U)
Doc. Ref. no. : m05/om/101
Issue no. 14
User’s Manual
Page 18 of 103
5. Unit Front and Rear Panel Description
This section provide description of GPS Master Clock Model MC-1-M unit front panel and back panel user
applicable interface.
5.1 GPS Master Clock model MC-1-M Front Panel
Below image shows GPS Master Clock Model MC-1-M model front panel. The front panel is equipped
with 20 x 4 line LCD display, 4 LED status indicators, Power LED indicator and keypad interface.
Figure 5.1: GPS Master Clock Model MC-1-M Front Panel Description
1. LCD Display: GPS Master Clock Model MC-1-M model is equipped with 20 character x 4 line
display. This displays various parameters such as Clock parameters (time, date, day of year, day
of week), GPS LOCK/UNLOCK status, GPS satellites data (latitude, longitude, antenna height,
total number of satellites available), Keypad configurable parameters etc
2. LED status Indicators: There are total 5 LED indicators including power led indication and four
other status indicators.
POWER: This LED illumination is RED color. This LED indicates the presence of power to
unit.
1PPS: This LED indicates the presence of 1PPS signal from GPS receiver module. It blinks
at every one second. The illumination is of RED color.
RTC ON / EVENT: This LED illumination is RED color. This LED indication functionality
depends on the type of feature available with ordered GPS Master Clock Model MC-1-M
device.
1. If the customer has ordered unit with EVENT output, this LED illuminates as per the
configured Standard Event period. If the configuration of EVENT output is PPM (Pulse
per Minute), this LED blinks at every 1 minute with respect to time on LCD display and
will remain ON for 1 second. If the configuration of EVENT output is PPH (Pulse per
Hour), this LED blinks at every 1 hour with respect to time on LCD display and will remain
ON for 1 second. Configuration can be done through front panel keypad or through
COM2 terminal on rear panel.
2. If the customer has ordered unit with RTC ON feature, this LED will blink when there is
no GPS signal present (in UNLOCK condition) and unit is running on its internal clock.
WATCHDOG: This LED illumination is RED color. This LED is ON when the unit becomes
unhealthy due to GPS receiver module failure or internal failure.
