Silicon Investigations Repair Service


Attention: Silicon Investigations no longer services IFR/Aeroflex analyzers.  Service is now being handled by Custom-Cal.  Contact 888-530-9009 or follow this link: Custom-Cal

Custom Cal

IFR/Marconi/Aeroflex MLS800 Simulator

Designed to operate from a bench test environment, the MLS-800 provides the operator test capabilities to test and align airborne MLS (Microwave Landing System) receivers. The MLS-800 test operational menu supports ICAO 1985 and EUROCAE ED-53A and ED-36A. The test set also supports complete main path simulation for approach (AZ), high rate azimuth (HiAZ), elevation (EL), back azimuth (BAZ) and flare (FL). As well, complete multi-path simulation capabilities include interference pulses and selectable fade rate modulation of 0.05, 1 and 1000 Hz.

The MLS-800 offers control of all beam parameters including angular position, beam amplitude referenced to the preamble, norm and half width pulse and selectable beam width at 0.5, 1, 2, 3, 4 and 5 degrees. The MLS-800 also gives sync capability for external monitoring, designating PFE and CMN function and designating multi-path function. The test parameters are all selected via a 44-position keyboard and displayed on test operational menus.

These analyzers were notorious for having display problems and failed power supplies.

Reference information for the IFR/Marconi/Aeroflex MLS800:

MLS-800 Data sheet

MLS-800 Operation Manual

Please see our shipping information page for packing and shipping of your valuable instrument: Shipping Cautions

Please call us at 920-955-3693 or email 


Last Modified May 29, 2019
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