Model: MTS200 (1U)
Doc. Ref. no. : m08/om/201
Issue no. : 03
User’s Manual
Page 38 of 195
Page 38 of 195
MTS200 is operating system based product so it takes few seconds for bootup which may vary from
15 to 40 seconds to start the main application. During initial bootup period, above two messages are
displayed in sequence. Once main application starts, below messages continue to start display.
Few seconds after GPS unit is powered up, 1PPS LED will start flashing in RED color which indicates
the Pulse per second output available.
When the time gets displayed on unit display, all other outputs will become active.
Since this unit uses standard ntp source in its system, the time on display will be corrected once the
ntp program synchronize with internal GPS receiver module.
If the antenna to the device is not connected and the gps receiver is in cold boot mode due to RTC
battery discharged or it unit is moved by several hundred kilometres from last sync position, the time
of
mas
TER
T-Sync
Model MTS200 device will get reset to
default time
(Time: 23:59:59 and Date:
21/8/99) ), in such case all outputs such as time on display, NTP, IRIG-B, serial time outputs, all
event outputs will be according to the default time. The time will only be corrected once the antenna is
connected to MTS200. In such case, operator can set the system time manually by front panel
keypad as explained in section
9.1 “Calender Settings”.
Note
: NTP clients time will be unaffected because MTS200
will raise “Unsynchronized” flag in its ntp
response to clients, as a result ntp clients time will not get disturbed till MTS200 internal clock is
synchronized with gps receiver by ntp driver.
If the device has entered in cold boot mode, then message will be displayed on front LCD (as shown
in below image) as well as ntp not sync trap will be send on SNMP manager and syslog if configured.
Also, the GPS LOCK LED in front will be “red” color till internal ntp driver synchronizes with gps
receiver which may take approx. 12.5 to 13 minutes in cold boot mode after power up.
Once the internal clock get synchronize with gps receiver, message will occur on display as shown in
below figure.
Internal ntp driver in operating system takes certain minutes to get the internal clock synchronized
within 1 millisecond w.r.t. gps receiver satellite time as ntp driver adjust (using skew method) its
internal clock using complex PLL clock sync. method.
