back signal

基本解釋

Two methods, manual backing off and capacitor coupling (by cutting off the d. c. component) are usually used to measure a small transient signal superposed on a large electric current.
在測量強電平上迭加的瞬變微弱信號時，常采用手動調(diào)節(jié)補償電平和電容隔直兩種方法。

Monitoring can be switched to listen to your recording signal against your backing track without incurring off-putting latency introduced by your music software.
ENGADGET: Focusrite launches iTrack Solo, a two channel interface for iOS and desktops (video)
From this point of view, backing down on the PCA will send a dangerous signal to the Kremlin that the EU does not have the willpower to stand up to foreign adventurism.
ECONOMIST: Europe.view
And, I contend, the signal moment when momentum stalls is usually when imaginative, brand-backing investment stalls .
FORBES: What Snuffs Out The Brand Torch's Flame?