Ten-Tec JUPITER - Page 33

amplifier and JUPITER. QST and other
amateur radio publications have
published articles on such devices. Тһе
Code Transmission, Digital
Communications, ог Station Setup
chapters in recent ARRL Handbooks
have some suitable circuits.
3.15.2, OPERATION WITH A TEN-TEC
QSK AMPLIFIER
To use a Ten-Tec (or similar) QSK
amplifier to greatest advantage оп СУМ,
cable these connectors to corresponding
input and output jacks on the amplifier
and enable this Joop. See Figure 3-2 for
a connection guide. То enable the
keying loop, select the KEYING LOOP
item on the Menu screen by first pushing
MNU and then turning the main tuning
knob to highlight KEYING LOOP.
Next, rotate the MULTI knob until ON
appears opposite TRANSMITTER.
Pushing MNU again returns you to the
previous screen.
The connectors should run in shielded
cables to corresponding KEY IN and
MODEL 538 TRANSCEIVER
SPARE EXT T/A
ТХ OUT ТХ ЕМ
AUX AUX
50 ОНМ АМТЕНМА
NON-QSK AMPLIFIER
KEY
OUT
jacks
on
the
rear
panel
of
a
Ten-Tec
linear
amplifier,
as
shown
in
Figure
3-2.
These
connections
ensure
that
proper
timing
is
maintained
between
the
transceiver
and
amplifier
during
QSK
operation.
Note: The default setting (in the MNU)
from the factory requires no connection
between the TX EN and TX OUT jacks to
operate JUPITER without an amplifier.
This is unlike other Ten-Tec transceivers
that use a jumper cable for “barefoot”
operation with the Ten-Tec keying loop.
The keying loop uses hardware
“handshaking” between the amplifier
and JUPITER to provide timing for full
break-in that makes CW more efficient
for experienced operators. This circuit
takes advantage of the fast switching
time of a well-designed QSK amplifier.
SHIELDED
CABLE
Figure 3-1-Connecting a Non-QSK Amplifier
3-6
74269 Second Printing
Model 538 JUPITER
30 August, 2001