R T M 3 2 0 5 U s e r M a n u a l
1
"Smarter Timing Solutions"
Chapter
One
Introduction
The RTM3205 Precision Timing Module provides highly-precise time and frequency outputs in a com-
pact, portable module. Optimized for size, weight and power (SWaP), the RTM3205 requires only 68
cubic inches of mounting space and consumes less than 10 watts of power.
Using a proprietary Global Positioning System (GPS) timing receiver, the RTM3205 supports opera-
tion in static or dynamic (shipboard only) platforms. Proprietary multiple satellite optimal ensem-
bling, adaptive 3rd order frequency control and TRAIM algorithms maximize the accuracy, stabil-
ity, and reliability of the output signals. A variety of top-quality quartz oscillators are available to
handle the full range of holdover, phase noise, and short-term stability requirements. Units equipped
with our Ultra-Stable OCXO provide unmatched close-in phase noise performance and short-term
stability.
The RTM3205 uses the GPS transmissions to precisely synchronize itself to within 10 nanoseconds of
Coordinated Universal Time (UTC). The frequency of the internal oscillator is disciplined to match
the frequency of the UTC timescale to less than 1 part in 10
13
over 24-hour observation intervals.
The time and frequency outputs are coherent after initial GPS synchronization, and synchronization is
maintained via 20-bit DAC frequency control, rather than phase stepping, to provide excellent short-
term stability.
For more detailed information that is not included in this manual, and links to other sites, please visit
http://www.endruntechnologies.com
. There you can also download firmware upgrades,
the latest manuals and other documentation.
Main Features
Robust GPS Receiver
RTM3205 is a GPS-based time and frequency standard designed to support mission critical applica-
tions. The proprietary GPS timing receiver in RTM3205 has many safe guards to protect against false
GPS signals. The receiver strictly adheres to the GPS Interface Specification and performs low-level
integrity checks to protect against weak corrupted signals, jamming, spoofing and accidental GPS
control system errors. EndRun’s GPS timing receiver technology has evolved to be highly robust
against these threats to provide time and frequency outputs you can trust.
Highly-Reliable, Modular Design
The RTM3205 provides high performance and reliability combined with small size and low power
consumption. Its internal sub-assemblies are fabricated using state-of-the-art components and pro-
Summary of Contents for RTM3205
Page 2: ......
Page 6: ...R T M 3 2 0 5 U s e r M a n u a l This page intentionally left blank...
Page 18: ...R T M 3 2 0 5 U s e r M a n u a l This page intentionally left blank...
Page 126: ...R T M 3 2 0 5 U s e r M a n u a l 108 A P P E N D I X A This page intentionally left blank...
Page 154: ...R T M 3 2 0 5 U s e r M a n u a l 136 A P P E N D I X E This page intentionally left blank...
Page 156: ...R T M 3 2 0 5 U s e r M a n u a l 138 A P P E N D I X F This page intentionally left blank...
Page 160: ...R T M 3 2 0 5 U s e r M a n u a l 142 A P P E N D I X G This page intentionally left blank...
Page 168: ...R T M 3 2 0 5 U s e r M a n u a l 150 A P P E N D I X J This page intentionally left blank...
Page 179: ......