Overview

The Pendulum Frequency Distribution Amplifiers, FDA-301A and DA-36, offer an economical solution to low-jitter and long-range distribution of Frequency Reference and/or Time Synchronization Signals.

The versatile and modular FDA-301A can distribute sine reference frequencies and time synchronization signals (1-pps and unmodulated IRIG-B) via fiber from a central source to up to 18 remote sites (point-to-multipoint). Additionally it can distribute serial Time-of-Day messages (NMEA or user defined code)

The small and low-cost DA-36 can distribute a sine reference frequency via fiber to 1 remote site (point-to-point) and is an excellent electrical to optical converter or optical to electrical converter.

Each DA-36 provides 4 coax outputs to local users, and FDA-301A provide 4, 8, or 12 outputs to local users. The DA-36 will interface directly to FDA-301A, and FDA-301A can be a drop-in replacement in current DA-36 (or legacy DA-35) networks. A distribution system can be designed with a mix of DA-36 and FDA-301A, for example distribution to only one remote site (DA-36), with several local users (FDA-301A).

Benefits

Both models use coax cables for local distribution and optical fibers for remote distribution, giving the following benefits for fiber:

• Long range distribution of reference frequencies up to 2 km
• Galvanic isolation, eliminate ground current loop problems
• No crosstalk, no electromagnetic noise and interference pick-up
• Input source (master-slave) redundancy – auto-switch-over makes distribution safer
• Easy to install – flexible, lightweight, low-cost, and small-diameter optical fiber

Quick selection chart

FDA-301A multi-point distribution

• Distribution of 10 MHz reference frequencies to 2km, pulses and ToD data
• Modular outputs, 3 slots: 6x fiber outputs, 4x coax outputs, or 4x ToD outputs per slot
• With 7x FDA-301A you have a distribution system from a reference to 72 remote users
• Optional DC, 24V ext. Power supply for power redundancy

DA-36 Point-point distribution

• Distribution of 10 MHz reference frequencies up to 2 km
• 4 coax outputs plus 1 fiber output
• Small, compact, and low-cost
• Opto-Electric and Electric-Opto converter