injection signal

injection signal

[in′jek·shən ‚sig·nəl]
(engineering acoustics)
The sawtooth frequency-modulated signal which is added to the first detector circuit for mixing with the incoming target signal.
References in periodicals archive ?
The injection signal is typically generated using a modified PWM method or by application of specific power-on states, upon which current response is measured.
Methods to obtain these parameters are several species and one of them is the injection signal method (Sungmin, 2010).