Explore the Meridian Precision GPS TimeBase
Point at the features to learn more or click to view front panel or view inside.
Power Entry Module
This is the high-performance power supply module. Meticulous thermal management and high-end Vicor modular
converter technology give you a fully loaded chassis, with Rubidium oscillator, that can operate over the full
0C to 50C ambient temperature range without chassis fans or ventilation holes. Both of these are undesirable
in precision frequency control products. Fans induce vibration, which degrades phase noise, and they fail eventually.
Vent holes allow dirt to be drawn inside to settle on sensitive components, and they allow air currents to degrade
the stability of non-ovenized oscillators.
Analog Timecode Amplifier Module
This optional module adds four AM timecode outputs to your Meridian TimeBase.
Your Meridian can provide up to 21 analog timecode outputs if desired.
These buffered outputs can provide synchronization to equipment such as digital fault recorders,
synchronized generators, SCADA systems and time displays.
Available timecode formats are: IRIG-B, NASA-36 or 2137.
Analog Timecode Amplifier Module
This optional module adds four additional AM timecode outputs to your Meridian TimeBase.
Your Meridian can provide up to 21 analog timecode outputs if desired.
These buffered outputs can provide synchronization to equipment such as digital fault recorders,
synchronized generators, SCADA systems and time displays.
Available timecode formats are: IRIG-B, NASA-36 or 2137.
Programmable Digital Buffer Module
This optional module adds four individually programmable TTL outputs to your Meridian TimeBase.
These buffered outputs provide on-time pulse rates from 1 PPS to 10 MPPS, or a digital timecode
output. Your Meridian can provide up to 22 TTL pulse rate outputs if desired.
An additional upgrade configures the Meridian with a Direct Digital Synthesizer (DDS)
that provides pulse rates from 1 PPS to 10 MPPS in 1 PPS steps, including 1.544 MPPS or 2.048 MPPS.
Oscillator/Low Phase Noise Output Module
This optional module configures the Meridian with several different 10 MHz oscillators.
Medium and High-Stability OCXOs plus Rubidium oscillators are available. Up to 20 low-phase-noise
outputs work with these high-performance oscillators to provide individually buffered,
spectrally pure, sinewave outputs with high channel-to-channel isolation.
Shown is the Rubidium option which uses two option slots. It incorporates a 1/4"
aluminum heat sink/spreading plate to conduct heat to the top cover of the Meridian,
where the large surface area allows it to escape freely. Eight outputs are shown.
CPU/Receiver Module
This module is the brain of the Meridian and performs the GPS Receiver/Timekeeping processing and provides
the user I/O features: 1PPS, Timecode, Ethernet, RS-232, Programmable TTL Pulse Rates, DDS Rates,
Sysplex Timer Output and more.
A dual-processor system places the time-critical GPS Receiver/Timekeeping tasks in an ARM RISC microcontroller
and the Network/Local User Interface tasks in an AMD 133 MHz ElanSC520 x86 processor.
All non-volatile storage is FLASH-based so software upgrades are easy to do.
