Ten-Tec JUPITER - Page 85

digital modes
Modulation methods, such as КТТУ, AMTOR,
PSK31, and others that use digital codes on RF.
direct frequency entry Setting the operating frequency by using
JUPITER’ в optional keypad.
Digital Signal Processor (processing).
duty cycle
Ratio of ON time to OFF time.
dynamic range
dynamic, ceramic, crystal,
Ratio between strongest and weakest signals
handled with acceptable performance.
Commonly available methods of converting voice
to electrical signals. Only the electret requires a
power source.
firmware
flash RAM
FM
forward power
or electret microphones
external T/R
This control signal usually keys an external
amplifier.
Computer instructions or data in a non-volatile
medium.
A form of non-volatile Random-Access-Memory
that accepts electronic updates without physical
removal from its host circuit.
(Frequency Modulation) impresses information
on an RF carrier by varying its instantaneous
frequency.
The component of RF power flowing in a
transmission line from the generator towards the
load. See reflected power and SWR.
The portion of receiver circuitry ahead of the
A metallic mass used to convey heat from
JUPITER's power amplifier components to the
—
front-end
main selectivity filtering.
heat sink
air.
iambic
automatic keyers.
IC Integrated Circuit.
Alternating formation of dits and dahs in some
—|
impedance mismatches
Discrepancies between inherent voltage-to-
current ratios of connected components,
especially transmitter and antenna.
KEY SPD
(Keyer Speed), the rate at which JUPITER's
keyer forms Morse code dits and dahs. See
WPM.
keyer
JUPITER’s internal means of automatic dit and
dah formation from the user's paddle input.
LCK (LOCK)
This key prevents accidental disturbance of
JUPITER's tuning knob from moving the
operating frequency of the transceiver.
74269 Second Printing
JUPITER Model 538
30 August 2001