Download User Manual - EndRun Technologies

ENDRUN
TECHNOLOGIES
10/100Base-T Jack
This RJ-45 connector mates with the ethernet twisted
pair cable from the network.
AC Power Input Jack
This IEC 320 standard three-prong connector provides AC power.
Performing an Initial Site Survey
Using the status LED indicators, it’s easy to find out if your Præcis Cntp will work in
your desired location:
1. Screw the SMA plug on the end of the antenna cable onto the SMA antenna
input jack on the chassis rear panel of the Præcis Cntp.
2. Plug one end of the supplied AC power cord into an 85-270 VAC outlet.
3. Plug the other end into the AC input connector on the chassis rear panel of the
Præcis Cntp.
Place the antenna on a flat, preferably metallic surface while the unit is searching for the
signal. Make sure that it is not blocked by large metallic objects closer than one meter.
Although the antenna should normally be installed in a vertical orientation, usually
multipath conditions due to signal reflections indoors cause at least some of the signal to
be horizontally polarized, so do not be surprised if you find that the unit will work with
the antenna oriented either way. Multipath conditions can also cause another effect:
signal cancellation. Since the wavelength of the signal is only about thirty centimeters,
movement of the antenna just a few centimeters can sometimes cause significant signal
strength changes.
Initially upon power up:
1. The unit will light the red Alarm Status LED for about ten seconds.
2. Then it will continuously light the green Lock Status LED.
3. When the unit has detected a CDMA signal, the green Lock Status LED will
begin to flash very slowly (about a .4 Hz rate).
4. As the unit locks onto the CDMA signal and begins to decode the timing data,
the green Lock Status LED will flash very rapidly (about a 6 Hz rate) until the
data is fully decoded.
5. Then the green Lock Status LED will pulse at precisely a 1 Hz rate, synchronized
to UTC seconds, with a short on duration relative to the off duration.
At this point, the CDMA time and frequency engine has fully synchronized, and you
may procede to permanently mounting the chassis and antenna in the desired location.
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Præcis Cntp User’s Manual