DATA SHEET ® TimeSource 3500 GPS Stratum 1 Timing System ® ® The Symmetricom TimeSource 3500 is Configuration Options Key Features a stand-alone Stratum 1 Primary Reference The TimeSource 3500 comes standard • Expandable outputs provide single Source (PRS) which works in GPS hostile with two T1 outputs. It can expand with box solutions for small/remote offices environments. TimeSource 3500 meets up to eight T1/E1/2.048 MHz outputs • Built-in early warning performance GR 2830 network PRS performance programmable on a per port basis. monitoring catches problems before they impact the network requirements by using a GPS antenna Applications • Eight user-configurable T1/composite mounted inside a window or on an outside clock/E1/2.048 MHz outputs The TimeSource 3500 system can be wall. Timing outputs with Stratum 1 • Sync status messaging configured as a PRS to front-end, an office performance are achieved using advanced • Optional SNTP TimeServer ® BITS or as a stand alone PRS with 10 BesTime technology, single-satellite outputs for remote or small offices. In the locking GPS receiver subsystem, and Key Benefits stand alone configuration, TimeSource 3500 Rubidium local oscillator. • Increases sync coverage into harsh provides up to 10 T1 outputs in a compact, GPS environments BesTime is a flexible clock engine inexpensive package. This configuration is • Window antenna lowers installation and maintenance costs which provides robust performance in ideal for timing remote switch sites which • Extended holdover reduces nuisance compromised GPS installations. BesTime may also have SONET terminals or other alarms and downtime continues to predict GPS timing information network elements. • Economical PRS alternative to cesium during the loss of GPS signals thereby The TimeSource 3500 ensures PRS guaranteeing Stratum 1 performance with performance is maintained through self- as few as one satellite in view for as little auditing the inputs and measuring and as 10 hours per day. PRS quality holdover is reporting performance against one another. extended to 72 hours (0-50°C) for long term Inputs can be easily provisioned to be either GPS outages. Typical holdover performance included in the timing ensemble output or is three weeks at PRS quality (at 25°C). be used for monitoring only. TimeSource TimeSource 3500 can be installed in just 3500 is fully software upgradeable and about any window or outside wall with a provisionable while in-service. Communication view to the sky, making it the inexpensive, is via RS-232 or Ethernet ports. yet high performance, alternative to cesium. Page 1 of 2 DATA SHEET TimeSource 3500 GPS Antenna (rooftop/window/wall) 1000 feet BesTime Clock Engine without amplifiers IF Converter Two T1 Outputs 10 MHz 100 usec TOD 1PPS Optional T1 SNTP TimeServer Span Inputs Optional Outputs • 8 T1/E1/2.048 MHz OR MTIE • 8 T1/Composite Cl Rb Oscillator ANSI PRS -48 VDC COMM Alarms 1 nsec 14.99 sec Observation Window (Tau) 1.821 Msec . . . . . . TimeSource 3500 Block Diagram TimeSource 3500 three week PRS quality holdover (@ 25°C) . . Specifications . . . . GENERAL 1 PPS OUTPUT ANTENNA SPECIFICATIONS . . . . . . Specifications: GR2830, ANSI T1.101, Type: Window or wall mount Number of outputs: 1 . . . . NEBS, UL patch; rooftop . . . Signal type: TTL . . . Internal oscillator: Rubidium . . Cable length: Up to 1000 feet without . . Connector: BNC . . amplifier Sync inputs: GPS, T1 (optional) . . . . Timing accuracy: . . . . Sync outputs: T1, 10 MHz, 1 PPS, Locked to GPS: 100 ns to GPS . . OTHER . . TOD, Composite . . . . Mechanical: 3.5"(H) x 19"(W) x Holdover: <3 μs to GPS for 72 Clock, E1/2.048 MHz . . . . 12"(D) hours (0°C to 50°C . . . . Sync status messaging: Outputs and inputs ±5°C) . . Power: -48 VDC (redundant) . . . . Communications: RS-232, Ethernet . . Operating temperature: 0° C to +50° C . . TIME OF DAY OUTPUT . . Management: TL1, TimeCraft, . . . . Humidity: 5% to 95% Type: Cisco or NTP type 4 . . TimeScan, . . non-condensing . . TimePictra . Signal: RS-422 Amplitude Modulated . . . . . EMC: FCC Part 15 . . Connector: RJ-45 BNC . . SYSTEM OUTPUTS . . . . . . Number of T1 outputs: Up to 10 (2 standard) . . SNTP TIMESERVER (OPTIONAL) . . . . Format: D4, ESF with or without . Type: SNTP . . . SSM - software selectable . . . . Interface: Ethernet . . . . Number of E1/2.048 outputs: Up to 8 . . . . . . SYSTEM INPUTS (OPTIONAL) Format: 2.048 Mb/s G.703/6 . . . . (CCS, CAS, CRC4, or . . Number: 2 . . . . non-CRC4 configu- . . Signal: T1 (bridged or . . rable) and 2.048 MHz . . . terminated) . G.703/10 - software . . . . selectable . Connector: Wire wrap or BNC . . . . . . . Frequency accuracy: . . -12 . . Locked to GPS: 1x10 . . . . . . -11 Holdover*: 1x10 for 72 hours . . . . -11 . . (0°C to 50°C ±5°C) 1x10 . . . . for three weeks (@ 25°C) . . . . typical performance . . . . . . -10 . . 1x10 for 30 days . . . . (0°C to 50°C ±5°C) . . . . . . . . . . . . * After 1 week of steady-state operation . . 2300 Orchard Parkway © 2012 Symmetricom. Symmetricom and the Symmetricom logo are registered trademarks San Jose, California 95131-1017 of Symmetricom, Inc. All specifications subject to change without notice. tel: 408.433.0910 fax: 408.428.7896 www.symmetricom.com DS/TimeSource3500/032112 900-00398-000 A