Datum TYMSERVE 2000, Руководство по эксплуатации и техническому обслуживанию

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TABLE OF CONTENTS
provide a display of the correct local time in those areas where Daylight Saving Time is observed
(most of USA). This feature does not affect the NTP timestamps, it only affects the display of
time on the LCD display.
Output Frequency: The rear panel Output Frequency signal can set to either 1, 5, or 10 MHz.
Periodic: The rear panel Periodic Output signal is programmable from 2.5 MHz to less than 1
Hz. The Periodic Output rate is determined by the following:
Periodic Rate = 10 MHz / N1 / N2
where 2 < = N1, N2 < = 65535
The periodic can be synchronized to the TYMSERVE 1 PPS signal for periodic rates greater than
or equal to 1 Hz.
Serial Port Protocol: This parameter selects the serial port protocol. Current choices are 9600
baud, 8-N-1 or 9600, 8-O-1.
The serial port is used to transmit UTC once per second using the format described in Chapter 3.
Set parameters to the factory defaults: Use this feature to return all TYMSERVE operational
parameters (network, timing, features) to the factory defaults.
4.10 INFORMATION DESCRIPTION (-GPS, -IRIG)
This section describes the information found in the <4> INFO area for the -GPS and -IRIG
versions.
Firmware Version: This is the version of the TYMSERVE firmware.
VCXO Voltage (DAC setting): The TYMSERVE synchronizes to the selected timing source by
controlling a Voltage Controlled Crystal Oscillator (VCXO). The control voltage is set by a 16-
bit Digital to Analog Converter (DAC). The value of the DAC is displayed here. This value is
savable, and is used to initialize the DAC at power on and when the timing source is changed.
The TYMSERVE will synchronize to the timing source faster (after power on) if the DAC is
initialized to the right value. You should let the TYMSERVE synchronize to the timing source
for at least 10 minutes before saving this value.
-GPS VERSION ONLY
The following information pertains to the GPS mode only.
Satellite Usage: This display shows the position fix mode and a list of satellites (by number) that
the TYMSERVE is currently using for timing and position fixes. The mode essentially shows
how many satellites are being used. A satellite number of 00 indicates that no satellite is being
used.
TYMSERVE 2000 Manual Datum Inc, Bancomm Div.
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