R T M 3 2 0 5 U s e r M a n u a l
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C H A P T E R T W O
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R T M 3 2 0 5 U s e r M a n u a l
B A S I C I N S T A L L A T I O N
DC Power Input Jack
This 2-position jack provides connection to the
DC power source. See details in
Appendix K - Specifications.
Spare Outputs
These unused SMA connectors are labeled “SPARE”. When used,
they will be labeled with their connector identifier (A, B, C or D)
and provide optional signals. Label examples are: “A-AMCODE”,
“B-1 PPS”, or “C-PPO”. Various optional outputs are listed below.
For details, see
Chapter 10 - Inputs/Outputs
. and
Appendix K -
Specifications
:
1 Pulse Per Second (PPS)
10M Pulses Per Second (PPS)
Amplitude-Modulated (AM) Time Code
DC-Level-Shift Time Code
Open-Collector Alarm
Programmable Pulse Output (PPO)
Direct Digital Synthesizer Pulse Rates (DDS)
10 MHz Low-Phase-Noise (LPN)
Performing a
Site Survey
Using the front panel status LED indicators, it’s easy to find out if your RTM3205 will work in your
desired location:
1. Temporarily mount the antenna on the roof. Make sure that it is not blocked by large metallic
objects closer than one meter. See
Appendix E - Installing the GPS Antenna
for more information.
2. Connect the TNC plug on the end of the antenna cable to the supplied TNC/SMA adapter. Con-
nect the SMA plug end of the adapter to the antenna input jack on the RTM3205.
3. Connect the “+24VDC” terminal to the positive output of the DC power source. Connect the
“GND” terminal to the negative output of the DC power source. The DC power source voltage must
not 32V. This unit will not operate if the +/- connections are reversed; however it will not be
damaged by a reverse connection. Note that the GND terminal is connected to the chassis inside the
unit.
Initially upon power up:
1. The unit will light the Alarm LED for about 10 seconds.
2. Then it will continuously light the Sync LED.
3. When the unit locks onto a GPS signal and begins to decode the timing data and adjust the system
oscillator, the Sync LED will flash very rapidly (about a 6 Hz rate) until the data is fully decoded and
the system oscillator is fully locked to the GPS frequency.
Summary of Contents for RTM3205
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