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In what frequency range is SSB normally used?
With SSB, channels could be spaced (usually) only 4,000 Hz apart, while offering a speech bandwidth of nominally 300 Hz to 3,400 Hz. Amateur radio operators began serious experimentation with SSB after World War II.
How do you use a single sided radio band?
To tune in an SSB signal, follow these steps:
- Set your rig to receive SSB signals. You may have to choose LSB or USB.
- Select the widest SSB filter.
- Adjust the tuning dial until you hear the SSB frequency.
- Continue to tune until the voice sounds natural.
What is meant by frequency offset?
In radio engineering, a frequency offset is an intentional slight shift of broadcast radio frequency (RF), to reduce interference with other transmitters.
What should the BFO be for a SSB signal?
In practice, this means that for a SSB signal to sound right, your receiver’s BFO frequency needs to be very close to the (suppressed) carrier frequency of the transmitter.
What does a SSB frequency actually indicate on a transceiver?
Most modern transceivers allow you to configure the BFO offset for CW. The above, combined with the fact that SSB often uses a 300-2700 Hz modulation passband, means that on SSB you normally aren’t actually transmitting on the indicated frequency, only near it.
How does a frequency offset model work in a receiver?
Frequency Offset Model: In an actual receiver, the received signal is down-converted to baseband, filtered and sampled. The complex baseband samples are processed to extract the information bits. Down- conversion and sampling are derived from the same LO.
Which is the lowest frequency in SSB mode?
The dial frequency in either SSB mode is the one that corresponds to 0Hz in baseband. So, for USB, the dial frequency is the lowest frequency in the transmission passband, and for LSB it’s the highest frequency. Typically the passband is 4kHz wide to accommodate human voice with reasonable fidelity.