Aeroflex IFR 2946A – The 2946A Communications Service Monitor is the lightest, most rugged service monitor available with a full performance spectrum analyzer as standard. For field work, the 2946A provides an excellent combination of instruments for all types of maintenance work. In the workshop, it provides all of the performance you would expect for exacting measurements. Avionics Systems Test Facility The 2946A provides an impressive range of features for the aircraft and avionics maintenance industry. In addition to the features provided by the general purpose 2945A, the dedicated 2946A Avionics Comminucations Service Monitor provides signals for testing the following: ILS receivers for localizer, including identification, glidescope and markers; VOR beacon receivers, with identification; SELCAL selective calling receivers.The 2946A screen gives a representation of the aircraft?s display in each mode, with the effective test signal parameters clearly indicated bothdiagramatically and numerically. Parameters can be altered in steps orcontinuously.