15
4.3 Resetting to Factory Defaults
Jumper J8
A: Reset to Factory B: Normal Operation
Jumper J8 on the inside of the time server is used to reset the units software settings to factory
original. This is useful when a password is forgotten or the IP address cannot be determined. To
do this, remove the 4 screws from the bottom of the unit. Move J8 to the “A” position and apply
power. After a few seconds, remove the power connection, replace J8 to the “B” position and
reassemble the unit. It should now have the factory default password and IP address information.
5 Specifications
5.1 Time Server Features and Specifications
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Receive time information from GPS satellites anywhere on the surface of the earth
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RFC1119/1305 NTP Protocol to serve time (Network Time Protocol)
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RFC1769/2030/4330 SNTP Protocol (Simple Network Time Protocol)
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Server Time Level: Stratum 1
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Server Time Precision: better than 5mS + network jitter.
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10M/100M adaptive network interface
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Unit is capable of serving 350+ synchronizations per second. That provides support for over
300,000 devices updating every 15 minutes on the network.
•
Active GPS outdoor antenna and 125’ of antenna cable included.
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Compliant with FCC Part 15, class B for radiated emissions and is a lead free product.
•
Power Requirements: less than 4 Watts continuous at 5 volts DC.
•
Environmental Requirements: Commercial temperature range, 0-70C, 95% humidity non-
condensing. Altitude -304m to 18,000m.
•
Networking: Static or DHCP IPv4 addressing. Standard browser interface for setup.
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Serial port supports both RS-232C levels and TTL (+3.3V) outputting standard NMEA
information strings, as well as the 1PPS signal at TTL levels.
•
LED alphanumeric front panel display with display configuration buttons
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Rear Connections: Power, Cat5 Ethernet, Serial, and GPS antenna via SMA connection.
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Dimensions: 19” (482 mm) W x 1 ¾” (44 mm) H x 8” (203 mm) D
5.2 GPS Module Specifications
•
Based on SiRF GSC3e Lpx chipset.
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20 channel low power receiver module
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Sensitivity: -144dBm, C/N0=26dBHz
•
GPS Time Precision: <1us, t/- 300ns ref UTC.
•
Antenna Connection: 1575.42MHz (L1 Band) at a level between -135dBm and -159dBm into
50 Ohm impedance. Maximum input return loss is -9dB.
•
TTFF (Time To First Fix):Cold start @-125dBm typically 33 seconds, Re-acquisition (<10s
obstruction) typically 1 second
Содержание NTP100B
Страница 3: ...3 6 Warranty Agreement 17 7 Payments and Returns 20 ...
Страница 7: ...7 Illustration 1 Password Page Default password is tmachine ...
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