NTP100 – Rev 2.2.0 Oct-12
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© Masterclock
®
, Inc.
proper ESD protection methods; and as a minimum, discharge yourself to a convenient ground before handling the
unit. Preferably, use a static discharge wrist strap connected to earth ground when handling, installing, and or
configuring the device.
• The NTP100 GPS unit provides power to the pre-amplified GPS antenna using low voltage supplied on the center
pin of the antenna cable. To avoid damage to the GPS receiver (and/or GPS antenna) caused by a short circuit,
make antenna connections only with power removed from the unit.
• Do not use GPS antennas provided by other sources. Non-amplified GPS antennas or antennas that are not
compatible with the GPS antenna supplied with your system may damage the GPS receiver unit.
Note: Damage to the GPS receiver is not covered under warranty. Please purchase a replacement NTP100-
GPS or NTP100-GPS-HS or contact technical support at Masterclock, Inc for repair.
5. The GPS antenna may have been damaged during installation or handling.
• Handle the GPS antenna carefully. The GPS antenna may be damaged by dropping or other impact on hard
surfaces.
• To avoid damage to the GPS antenna (and/or the NTP100 GPS receiver), caused by a short circuit, make antenna
connections only with power removed from the unit.
Note: Damage to the GPS antenna is not covered under warranty. Please purchase a replacement. If the GPS
antenna is damaged please contact Masterclock, Inc. to order a replacement. The GPS antenna cannot be
repaired.
6. The GPS antenna cable may have been damaged during the installation or handling.
• The GPS antenna cables may be damaged by pulling/twisting of the connectors, or by pinching/over bending the
cables, such as while pulling the cables with a cable puller or other method. Pull and route the antenna cables
carefully. Ensure that you do not pull directly on the connectors during the installation. Ensure that you do not
twist the connector at the location where the connector meets the cable, as this can damage the braid. If the GPS
antenna cables are damaged please contact Masterclock, Inc. to order a replacement.
Note: Damage to the GPS cables is not covered under warranty. Please purchase a replacement set of cables.
If the GPS antenna is damaged please contact Masterclock, Inc. to order a replacement. The GPS antenna
cannot be repaired.
Time Code Decoding Issues
The following items are specific to the NTP100-TC model.
The easiest way to verify that the NTP100-TC is decoding time code is to observe the status of the LED on the front panel
and with the WinDiscovery “Status”. The green LED will be flashing at 1 pulse per second when the NTP100-TC is
properly decoding time code. If the LED is not lit, or is not flashing at 1 pulse per second (1 Hz), then there is a problem
with the time code signal.
Time code decoding problems can include any of the following:
• no time code present
• ground loops or other interference
• bad/intermittent cables, wiring, or connectors
• a signal level that is out of range (too high or too low)
• a signal level that is fluctuating
• a time code type that the NTP100-TC does not support
Before concluding that there is a physical problem with time code decoding on the NTP100-TC, please rule out all of the
above possibilities.
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