Model: MC-1-M (2U)
Doc. Ref. no. : m05/om/101
Issue no. 14
User’s Manual
Page 98 of 103
Also, the serial communication parameters such as baudrate, parity, stop bits of COM2 terminal
are configurable through unit front panel keypad (refer section 9). It is necessary to match the end
device serial communication parameters as per configured in GPS Master Clock Model MC-1-M
unit.
17.7
Not able to do configuration through COM2 terminal
Refer troubleshoot index 17.6.
In order to configure GPS Master Clock Model MC-1-M unit through serial configuration COM2
terminal, it is necessary to enter correct password (when asked for, refer section 10.2.1.) in serial
communication terminal software of remote PC. Factory set password when shipped from factory
is masibus. If user changes the configuration password through serial configuration, factory set
password will be replaced with new configured password.
NOTE: Password used for unit parameters configuration through keypad and serial
communication are different. If user have forgot its own configured password for keypad menu or
serial configuration menu, user should contact Masibus Service department.
17.8
Problem with getting unit LOCK to GPS satellites
1) It is always recommended to use factory provided antenna cable shipped with GPS Master
Clock Model MC-1-M unit. If antenna cable used for installation is other than provided with
GPS Master Clock Model MC-1-M unit, please contact Masibus Service department for
assistance.
2) GPS Antenna must be installed properly as per suggested in section 5.1.1 and 5.1.2.
3) GPS Antenna cable must be connected at the antenna connection on rear panel of GPS
Master Clock Model MC-1-M device.
4) Refer section 5.1.5 for antenna cable technical details.
5) Check Antenna cable continuity. Unplug the antenna cable connection from GPS Antenna
and antenna connector on GPS Master Clock Model MC-1-M rear panel. Short the Antenna
cable at any one end and check the continuity at other end using Digital Multimeter. If there is
any break in continuity, contact Masibus service department for rectification.
6) If antenna cable is proper, refer section 5.1.3 for further diagnostics.
7) If GPS Master Clock Model MC-1-M device is able to capture very less number of satellites
even if the weather and sky is clear, try to re-orient the GPS antenna or relocate the GPS
antenna so that maximum number of GPS satellites is visible.
17.9
IRIG-B / IEEE 1344 client synchronization fail
Following steps are to be checked for issues of IRIG-B synchronization failure or loss.
3) IRIG-B BNC cable should be tightly connected and locked at GPS rear panel IRIG terminal
and at IRIG-B client device terminal.
4) If IRIG client device terminal is other than BNC type connector, ensure that IRIG connection
is done with correct polarity at client device terminal end.
5) Total number of IRIG-B/IEEE 1344 compatible devices connected on the IRIG TTL or IRIG-
AM terminal of GPS Master Clock Model MC-1-M should be determined considering the
