ELECRAFT K3, Руководство пользователя

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38
Receive Antenna In/Out
The RX ANT IN / O UT jacks, supplied with the
KXV3 option, have various uses:

Low-noise re ceiving antenna: Some operators
use a Beverage, tuned loop, or other low-noise
receiving antenna. You can connect such
antenna to the RX ANT IN jack, then tap
R X AN T
to select it. The
RX
icon will turn on.

Narrowband filters or preamps: You can
"patch in" a specialized filter or preamp (e.g.,
the Elecraft PR6 preamp for 6 meters) between
RX ANT IN / OUT . Tap
R X AN T
to switch the
filter in (per-band). It will be in-line only during
receive, so you can use low-power devices.

Te st signal inje ction: The RX ANT IN jack is
ideal to inject a test signal, because the
generator won't be damaged if you transmit.

Re ceive r comparisons: If you connect the RX
ANT OUT jack to a second receiver, and leave
the RX ANT IN jack open, you can A/B test the
K3 against the other receiver. When the
R X
AN T
is not selected (
RX
icon off), the K3 will
be receiving on its main antenna jack, and the
other receiver will have no input. If you then
tap
R X AN T
, the K3 will have no receive
antenna, while the other receiver will be
operating from the K3's main antenna.
I f you’ r e c ompar i ng
the K3 to a transceiver and
using its transmit/receive antenna, be sure to set its
power to 0 so you won't damage the KXV3 when
you transmit.
Buffered I.F. Output
The KXV3 provides a buffered first I.F. signal at
the IF OUT jack. This signal (about 8.215 MHz) is
compatible with some panadapters. Refer to
panadapter documentation for interfacing and
operating instructions. The frequency of the first
I.F. for a given mode/filter setting can be queried by
a computer using t
he c ommand “
FI;
” ( r ef e r t o t he
K3 Programmer’ s Ref er enc e
).
Use a short, high-quality coax cable be tween
the K3 and the panadapte r. Additional isolation
circuitry may also be re quire d.
Using Transverters
Nine user-definable bands are provided for use with
transverters. Once enabled, each will appear in the
band rotation above 6 m. You can use Elecraft XV-
Series or other transverters with the K3. See pg. 18
for transverter control connections.
Transverter Band Setup
Transverter bands are set up using the
XV
menu
entries. Tap
1
–
9
within menu entries to select a
transverter band to configure.

XVn ON must be set to
Y E S
to enable
transverter band n .

XVn RF selects the transverter operating
frequency in MHz.

XVn IF specifies a K3 band to use as the
transverter I.F. (7, 14, 21, 28, or 50 MHz).

XVn PWR
sets the K3 power output range to
be used with this transverter band. L . 01 -
L1 . 2 7
specifies a power level in milliwatts,
which requires the KXV3 option (use the
XVT R IN and OUT jacks).
H 0 . 0 -H12 . 0
s peci f i es power i n wat t s , and s el ec t s t he K3’ s
main antenna jack(s) for output.

XVn OFS can compensate for frequency offset
i n t he t r ans ver t er ’ s os ci l l a t or / mul t i pl i er chai n.
The value shown is in kHz.

XVn ADR specifies an Elecraft XV-Series
transverter select address (see XV manual).
For we ak-signal work: If you have a KXV3 ,
you can improve isolation between XVT R IN/OUT
and RX ANT IN/OUT by removing any antenna
connected to RX ANT IN. If you have a
KAT3 ,
you should tap
AN T
to select the antenna (1 or 2)
that has lower sensitivity on the transverter I.F.
band in use. (
Note : The ANT 1 / 2 icons are not
displayed if XVn PWR is set for
L
power range.
Use H range temporarily to see the icons.)
C AUTIO N: When possible , use mW-le vel
drive with transverte rs (via XV TR O UT). If you
use ANT1 or 2, you could accidentally transmit
into a low-le vel transve rte r at high power.