Single sideband transceiver

Details Single sideband transceiver Single sideband transceiver

H - Electricity

04

B

325/19

H04B 1/40 (2006.01)

Patent

CA 1097742

SINGLE SIDEBAND TRANSCEIVER Abstract of the Disclosure A transmitter unit comprises two resonant circuits which are caused to oscillate during transmission to produce two pilot signals of predetermined frequencies. The pilot signals are mixed with an audio signal and used to modulate a transmission carrier signal in a balanced modulator which forms two sideband signals. The transmission carrier signal and one of the sideband signals are suppressed to form a single sideband signal which is used to modulate a channel signal for transmission. A receiver unit comprises a voltage controlled local oscillator which produces a local oscillator signal which is hetrodyned with the modulated channel signal to recover the single sideband signal. A reception carrier signal is hetrodyned with the single sideband signal in a balanced demodulator to recover the pilot signals and audio signal, the latter of which is fed to a speaker. The pilot signals are applied to a first frequency detector which detects the differ- ence frequency thereof and triggers a voltage sweep generator to apply a voltage sweep to the local oscillator thereby causing a local oscillator frequency sweep. The pilot signals are further fed to the resonant circuits which are used during reception as second and third frequency detectors which detect when the hetrodyned pilot signals reach their predetermined frequencies and interrupt the control voltage sweep at that instant, main- taining the local oscillator signal at the proper frequency. Means are provided to reset the receiver unit to manual local oscillator control if a control voltage sweep is completed without detection of the pilot signals by the second and third frequency detectors.

293104

Affiliated with

Also associated with

Rating

Single sideband transceiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Single sideband transceiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single sideband transceiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1018525