Simple Electronic Counter Measure (ECM) a.k.a Simple Jammer is capable to jam a friendly and foe communication system. For example, both friend and foe in VHF frequency is easily get jammed when VHF jammer is switch on.
Probably the same. A frequency counter is specifically intended to count frequencies, but an electronic counter could be counting anything.
Electronic Counter-Measures
Thermometer is the electronic equipment used to measure temperature.
radioactivity
radioactive
to measure electrical enegy
A geiger counter is a measuring instrument, not a measure.
A geiger counter measures radioactivity.
With a Geiger counter.
it a electronic balance to measure weight
it a electronic balance to measure weight
A Voltmeter.