565 manual
September 2003
Part #74279
Printed in USA
49
Problem: Distorted SSB transmit
Be certain the mic gain is set properly. The
ALC LED should flash on voice peaks, but
not remain continuously lit.
Check the setting of the speech processor.
An excessively high setting can reduce
audio quality.
A frequent cause of a distorted SSB signal is
inadequate RF grounding resulting in RF
feedback. Common RF grounding problems
are no ground connection, or too long a lead
to a good ground. 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 ¼ wavelength on any band
used can be particularly troublesome when
the far end is connected to earth.
Another potential cause of distorted SSB
arises when the station is in the near field of
the antenna. This is a problem many
apartment dwellers face.
Problem: No transmit, but receiver(s) OK
Is one of the TX LED’s on the buttons to the
far left of the transceiver lit? See the
discussion of buttons
8
and
9
as described
in Chapter 2. If neither of these two buttons
is lit, the radio will not transmit.
The transmitter can be disabled in the TX
menu (see Chapter 3). Make sure it has not
been disabled.
Is the gain setting correct for the microphone
input or AUX I/O as appropriate?
Is the KEYING LOOP set properly for your
mode of operation? With no amplifier or
with a non-QSK amplifier the menu should
indicate keying loops are turned off. If
either of the two keying loops are enabled
and no connection is made to them, the
radio will not transmit.
Is the PWR control turned up to an
appropriate value?
Problem: No receiver(s), transmit OK
Check the PBT setting or turn it off. It may
be set outside the passband.
Disconnect any external equipment that
might be pulling the PTT line MIC or PBT
connector to ground.
Is the internal KEYER enabled with a mono
plug in the KEY jack? That would cause a
constant stream of dits when you apply
power.
Check settings of the squelch in the RX
menu and the AF and RF gain controls.
Problem: No operation in VOX
Check ORION’s screen to see if the menu
items for VOX are active and set properly.
If any of the three settings is at zero, VOX
will not operate.
The Ten-Tec model 701 hand microphone
will not operate in VOX mode.
The mic element in other (non-Ten-Tec)
microphones must be active (open) when
used in VOX mode with ORION. This
generally means locking the PTT on the
microphone after putting the radio into VOX
mode – but every mic is different. Consult
the operation manual of your microphone.
When All Else Fails…
If the measures above do not fix the
problem, please consult with our service
department. Telephone (865) 428-0364.
Email
