Counter signal

Related to Counter signal: Frequency counter
a signal to answer or correspond to another.

See also: Counter

References in periodicals archive ?
The search yielded mobile signal boosters, which Aguirre said were being used by the inmates to counter signal jammers, along with a TV set, cigarettes and cash.
Modi's strong counter signals the government resolve not to buckle under criticism of Opposition parties on his reform measures and carry forward the governments' agenda.
The common approach to processing applications for medicines sold over the counter signals a significant step towards establishing the new agency.