Spectrum Instruments TM-4 Intelligent Reference Time & Frequency System

Description

Spectrum Instruments TM-4 Intelligent Reference Time & Frequency SystemCondition: * New surplus stock, in sealed OEM packaging. As pictured. Additional Notes: * High spectral-purity 10 MHz sine wave output.* MTIE Stratum-1 compliance with frequency accuracy of 1×10-12 (long-term).* Standard one pulse-per-second (1 PPS) output with separate Spectrum ASCII Serial Time Message.* Sawtooth-corrected timing accuracy of 5 ns.* User-selectable PPS source and output mode* GPS-disciplined ovenized oscillator with very low phase noise.* Unit-to-Unit Phase Coherency optimization.* State-of-the-art 12 channel GPS technology.* Spectrum’s exclusive FastStart technology offers high accuracy within just minutes of start-up.* Intelligent Holdover function provides near-Rubidium stability during GPS unavailability.* Static and dynamic timing modes.* Auto Survey position averaging mode.* Timing information derived from all satellites tracked with only one satellite required in Static Timing Mode.* RS-232 control interface for control by a host computer.* Alternative oscillator choices available to meet unique application requirements, including low-cost VCXO, low-power OCXO, and Rubidium Rival DOCXO.* Two multiplexer outputs. Mux output 1 supplies one of six selectable TTL outputs slaved to the primary frequency reference: 1, 10, and 100 kHz, and 1, 5, and 10 MHz. In addition, Mux1 can also supply a TTL level PPS output or optionally be configured to supply baseband IRIG time code. Mux output 2 can supply 10 MHz or PPS at TTL levels, mirror Mux1s output, or may optionally supply baseband IRIG or a customoutput.* NMEA 0183-format message capability (subset).* Optional very wide range frequency synthesizer output slaved to primary reference. Consult factory forspecific application.* Optional second sine wave output, either identical to or independent of primary frequency, up to 200 MHz.Page 2* Optional auxiliary frequency output such as 1.544 MHz or 2.048 MHz slaved to the primary frequency reference. Virtually any common frequency may be chosen.* Optional synthesized timing pulse output coherent with 10 MHz output and synchronized to 1 PPS. This may be virtually any frequency up to 100 kHz, including frequencies such as 216 2/3 Hz.* Event Time-Tag (ETT) time stamp with 100 ns resolution.* Programmed Output Pulse (POP) with selectable pulsewidth and polarity. One-Shot and Repeat Modes.* Optional Type 11 Network Time Protocol (NTP) output.* Optional IRIG B (or other time code) serial time code output (TTL and modulated). IRIG G and other IRIG formats also available.* Windows-based Control/Display software.* Front panel indicators for power status, reference ready, and alarm status.* 9 to 35 VDC operation with rechargeable lithium battery back-up for GPS data. Spectrum Instruments TM-4 20020-001