Ten-Tec JUPITER - Page 30

and possible effects of an amplifier.
The factory-default setting of 1:1 at 50%
will suffice for most purposes. CW with
extreme values of weighting may sound
“distinctive”, but it can be hard to copy!
3.5.6, Sidetone Volume
S.T. VOL controls CW sidetone volume
as a separate adjustment from the main
radio volume control. These two
controls do interact and as main radio
volume is increased, sidetone volume
will increase. Some experimentation
with sidetone volume vs. main volume
will result in a comfortable setting.
3.5.7. Sidetone Frequency
The most usual pitch setting of beat-
frequency oscillator (BFO) offset and
monitoring sidetone is 700 Hertz,
JUPITER’s default value, but some
operators prefer a different pitch. This
Menu item assigns the MULTI control to
adjust the BFO and sidetone together in
10 Hertz steps from 0 to 1270 Hertz.
3.5.8, Spot Volume
This MNU item adjusts the volume of
the CW spotting tone aid (see paragraph
2.4.8. The SPOT tone occurs only
while the front panel SPOT button is
depressed while in CW mode.
3.6. SSB AND DIGITAL MODE
SETTINGS
3.6.1. Transmitter Filter Bandwidth
- IMPORTANT:
Тһе JUPITER operator 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.
A 3.0 kHz transmit bandwidth has a
more “well-rounded” audio response
than a narrower bandwidth. Wider
transmit bandwidth, however, increases
the potential for interference with
stations using adjacent frequencies.
74269 Second Printing
Model 538 JUPITER
30 August, 2001
The FCC regulations (Part 97) governing
amateur radio operation do not specify a
maximum transmit bandwidth for SSB
communication. However, ЕСС
regulation 97.307(a) requires amateur
stations to occupy no more bandwidth
than is necessary for the emission type in
accordance with good amateur practice,
In amateur practice, SSB radio
transceivers use between 2.4 and 2.8
kHz, and this range is the de facto
standard for а communications-grade
SSB transmit signal 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 stations
while doing so is specifically what these
regulations are addressing. In summary,
what may be an acceptable bandwidth on
a given band at a given time may not be
acceptable on another band, or at another
time.
SSB transmission on JUPITER is DSP
generated. There are 18 available
transmit bandwidth filters to suit your
individual taste for transmit audio or
data. The factory setting is 3000 Hertz.
The available transmit bandwidths are
900, 1050, 1200, 1350, 1500, 1650,
1800, 1950, 2100, 2250, 2400, 2550,
2700, 2850, 3000, 3300, 3600, and 3900
Hertz.
3.6.2. ` Microphone Gain:
The MIC button adjusts microphone
gain with the ever-versatile MULTI
control. While speaking into the
microphone, advance the MIC (MULTI)
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