intermediate-frequency signal

intermediate-frequency signal

[‚in·tər′mēd·ē·ət ¦frē·kwən·sē ‚sig·nəl]
(electronics)
A modulated or continuous-wave signal whose frequency is the intermediate-frequency value of a superheterodyne receiver and is produced by frequency conversion before demodulation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The core of DDC is to mix intermediate-frequency signal sampled by A/D with the local digit intermediate-frequency carrier signal from NCO (Numerically Controlled Oscillator) of DDC and down convert the intermediate-frequency signal to the base-band.
In Figure 1,X(n) is the digital signal transferred by high-speed 10-bit ADC; NCO module is the numerically controlled oscillator, and it produces sine wave signal cos([w.sub.0]n) and sin([w.sub.0]n) whose frequency equals that of intermediate-frequency signal. Then we can get base-band signal by multiplying the data transferred by high-speed ADC respectively with the signal produced by NCO (aiming at mixing).
Endwave's modules provide the high-frequency and intermediate-frequency signals in the system.

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