Model: MC-1-M (2U)
Doc. Ref. no. : - m05/om/101
Issue no. 14
Page 31 of 103
User’s Manual
4. It is recommended to first get the GPS Master Clock unit LOCK before using all outputs for time
synchronization to client device in order to avoid time difference of GPS Master Clock w.r.t. UTC time
due to GPS Master Clock POWER ON in Unlock conditions or battery discharged due to long period
(as per section 8.2) of unit in Power OFF conditions.
5. After the power supply is connected properly, Power ON the unit. After unit is Power ON, there are
specific messages displayed on the screen till the time and date are displayed on unit display screen.
Refer section 8.3 for the Unit Power ON status.
6. At startup, the clock of unit in Unlock conditions may not be correct if the unit was in Power OFF
condition for long duration. Refer section 8.1 and 8.2.
7. It is necessary to change the Ethernet addresses of unit NTP output ports individually (connecting
NTP port directly with PC using Ethernet cable) before using GPS as NTP server. Refer section 13.1
and Appendix E.
8. User can configure other configurable parameters of GPS Master Clock Model MC-1-M using keypad
and COM2 terminal serial communication as explained in section 9 and section respectively.
9. After unit settings and configuration is done, user should provide power restart to unit.
10. After unit Power ON, unit should be kept for warm up duration in LOCK condition.
11. Once unit is Power ON, it is necessary to keep the unit in warm up condition for minimum 1 hour in
antenna LOCK condition for precise and accurate timing outputs during unit LOCK and Holdover
conditions.
6.3 Wiring Diagram
Figure 6.3: GPS Master Clock Model MC-1-M Wiring Diagram
