Ten-Tec JUPITER - Page 90

7.3
7.6
RF Grounding
Many problems relate to the lack of
an RF station ground, as contrasted
with a safety ground connection. We
recommend bonding all equipment
chassis together with short heavy
metal braid or strap. Make these
connections from chassis ground lug
to chassis ground lug and connect the
last piece in the chain feeding the
antenna to a good earth ground. This
lead needs to be as short as possible.
Lengths near М wavelength on any
band used can be particularly
troublesome when the far end is
connected to earth.
Ten-Tec recommends following the
good advice in the ARRL Handbook
for dealing with RF grounds and
safety grounds.
No Transmit, but Receiver
works
7-2
Check the following items on
JUPITER's ММО screen to decide if
the setting is right for the operating
mode you plan to use:
Is the AUDIO SOURCE sct to MIC or
LINE as appropriate?
1 the TRANSMITTER ENABLE
ON?
Is the KEYER ENABLE ON?
Is the KEYING LOOP set properly
for your mode of operation? With
no amplifier or with a non-QSK
amplifier the MNU should indicate
KEYING LOOP off. See paragraph
3.15.
No Receiver, but JUPITER
Transmits
Check the PBT setting or tum it off.
It may be set outside the passband.
Disconnect any external equipment
that might be pulling the PTT line to
ground.
Is the internal KEYER enabled with a
mono plug is in the KEY jack? That
would cause a constant stream of dits
when you apply power.
Check settings of the SQL, AF, and
RF controls.
No operation in VOX
Check the switch on the bottom of
the Model 705 microphone.
Check JUPITER's screen to see if
the MNU items for VOX are active
and set properly. If any of the three
settings is at zero, VOX will not
operate.
When All Else Fails...
If the measures above do not fix the
problem, please consult with our
service department.
74269 Second Printing
JUPITER Model 538
August, 2001