[Amps] Emission Standards Regarding SSB & AM Bandwidth

[John]

I believe those to be old rules like the power input deal & are outdated....
I have a question how does tentec & Kenwood get there radio's type accepted
when the 950SDX goes from 50hz to 3.5khz & tentec Jupiter and the new Orion
are 3.9 wide , along with the Pegasus. The DSP100 on the Kenwood 850 is over
3.5khz also




Here the setup from the tentec owners manual ..(The Jupiter is 3.9 wide &
type accepted)

SSB SETTINGS IMPORTANT:

The JUPITER transceiver is capable of transmitting in SSB mode with a
variety of transmit bandwidths. The default value as shipped from the
factory is 2.55 kHz. An operator of the JUPITER should be aware of the
implications of using wide SSB filtering while transmitting.

Audio fidelity generally improves with the use of wider SSB transmit
filtering. Using a 3.0 kHz transmit bandwidth will have a more
"well-rounded" audio response than anarrower bandwidth. As transmit
bandwidth widens, so does the potential forinterference with stations using
adjacent frequencies.

In practice, amateur radiotransceivers typically utilize a SSB transmit
bandwidth of between 2.4 and 2.8 kHz, andthis range has come to be a de
facto standard for a communications-grade SSB transmit signal.

Part 97 of the FCC regulations governing amateur radio operation does not
specify amaximum transmit bandwidth usable by amateurs for SSB
communication.

However, FCC regulation 97.307(a) requires amateur stations to not occupy
more bandwidth than is necessary for the emission type being transmitted in
accordance with good amateur practice.

Regulation 97.307(b) requires that emissions outside the necessary bandwidth
must not cause splatter interference to operations on adjacent
frequencies.While these are broad regulations subject to interpretation, the
responsibility for complying with the regulations rests with the operator.

Using a SSB transmit bandwidth wider than necessary for communications and
causing interference to adjacent stationswhile doing so is specifically what
these regulations are addressing.

In summary, whatmay be an acceptable bandwidth on a given band at a given
time may not be on another band at another time.

TRANSMIT FILTER:

SSB transmission on the JUPITER is DSP generated. Thereare 18 available
transmit bandwidth filters to suit your individual taste for transmit audio.
In general, the wider the bandwidth audio, the more "well-rounded" the audio
fidelity,though this will vary with microphone and individual voice
characteristics. The default value, as supplied from the factory is 2.55 kHz
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