Meinberg introduces the IMS-HEM100 module. The Rubidium-based IMS-HEM100 module guarantees high-accuracy timing when the external reference signal input of the IMS LANTIME is unexpectedly lost or strategically disabled for any reason, such as signal interference, GNSS jamming, or detection of attempted spoofing.

The IMS-HEM100 module uses an integrated high-accuracy Rubidium oscillator to reliably bridge signal outages caused by signal interference or malicious jamming, or to isolate a timing system strategically when a reference clock such as Meinberg’s IMS-GXL identifies a high risk of GNSS spoofing.

The holdover performance of the IMS-HEM100 module is between that of a full XHE^Rb Rubidium enclosure and Meinberg’s most powerful OCXO-DHQ oscillators. In asynchronous operation, it deviates by only 1.5 microseconds over 24 hours, allowing the IMS system to continue meeting stringent industry requirements even after a day of operation in holdover mode.

During normal operation, when the reference clock is synchronized to an external reference source, the IMS-HEM100 is continuously disciplined by the reference clock to ensure that it provides the requisite accuracy when needed. When the reference clock loses synchronization, this relationship is inverted, with the reference clock using the disciplined IMS-HEM100 as a durably accurate timing reference until the external reference signal is restored.

The IMS-HEM100 is an incredibly compact solution, consuming significantly less power than a full XHE^Rb Rubidium enclosure and providing a compelling alternative that is cost-effective in acquisition and operation.