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Figure 4-2. Split frequency operation with
DX station being received on main receiver
via VFO A, subreceiver monitoring of pileup
and transmit frequency on VFO B.
OPERATING THE INTERNAL ANTENNA
TUNER (if installed)
Your ORION may be equipped with an
internal automatic antenna tuner. If
installed, the tuner is active on the ANT 1
jack only, and has a load impedance range
of 6 to 800 ohms (up to 10:1 SWR).
The tuner can be enabled or disabled from
the menu system. The default condition is
to have the tuner enabled. To enable or
disable, press MENUS then select the TX
menu. The first line item in the TX menu is
Internal Tuner. Use the MULTI knob to turn
the tuner on or off.
The tuner is activated by pressing the TUNE
button on the front panel. The rig will
transmit a keydown CW carrier at
approximately 20 watts output. The tuner
will activate and tune. When finished, the
CW carrier will stop and TUNED will appear
on the screen just under the TUNE button.
The tuner will usually stop at a value of 1.5:1
SWR or lower. Occasionally it may present
a slightly higher SWR after tuning. This is
normal, and the transceiver will still transmit
at full output power with no foldback.
The tuner does not automatically reactivate
when presented with a higher SWR after
changing frequency. If the tuner was tuned
on 14.025 MHz and you later moved to
14.200 MHz, the tuner may require re-tuning
and can be activated again with the TUNE
feature.
565 manual
Part #74279
Printed in USA
There is no memory feature; the tuner will
not retain the last setting for a particular
band or frequency.
CONNECTING AN EXTERNAL LINEAR
AMPLIFIER
Whether you have an amplifier that is full
break-in, and how the full break-in is
accomplished, will determine the method for
connecting the linear to ORION.
Two sets of keying outputs are provided for
the two available antenna jacks on the radio.
AMP KEY 1 and TX OUT / TX EN 1 are
used for a linear connected via the ANT 1
jack. AMP KEY 2 and TX OUT / TX EN 2
are used for a linear amplifier connected via
the ANT 2 jack. RF appears approximatel
15 mS after closure of either AMP KEY 1 or
AMP KEY 2.
Non-QSK linear amplifiers or QSK linears
that do not employ the use of a keying loop
are keyed from the AMP KEY 1 and AMP
KEY 2 jacks (see (66) AMP KEY 1 and (68)
AMP KEY 2 in chapter 2). Connect the PTT
keying line of your linear amplifier to the
AMP KEY 1 or AMP KEY 2 jack as desired
using a shielded cable with RCA-style male
phono connectors at each end.
The external amplifier key line should not
apply more than +100V (output inactive) nor
should it draw more than 250 mA (output
active). Many older linear amplifiers like
those manufactured by Collins, Drake, and
Heathkit have a higher voltage on the
keyline. Such amplifiers require a relay or
transistor switch between either ORION
AMP KEY jack and the amplifier PTT
keyline. If you are unsure if your amplifier is
suitable, please consult the operator's
manual for your amplifier or contact the Ten-
Tec service department.
An adjustable delay is available for each of
the AMP KEY jacks. These are titled EXT
T/R Delay 1 and EXT T/R Delay 2. These
give the operator the ability to have the
amplifier keyed longer by the radio,
preventing drop outs between words of SSB
or CW operation. EXT T/R Delay 1 and
EXT T/R Delay 2 are found in the TX
submenu under MENUS.
Some QSK linear amplifiers incorporate the
use of a full break-in keying loop. Ten-Tec
linear amplifiers use a full break-in keying
September 2003
38
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