ELECRAFT K3, Owner'S Manual

Page: 19 / 78

19
Band Outputs (BAND0-BAND3)
BAND0-3 provide band selection signals. Their
behavior is determined by the
CONFIG:KIO3
menu entry. (See tables below.)
BAND0-3 are open-drain outputs. The attached
device must provide pull-up resistors (typ. 2.2K) to
its own supply voltage (usual 5 VDC).
In the tables below, 0 = 0 VDC, and 1 = device
supply voltage.
With
CONFIG : KIO3
se t to NO R , the BAND0-3
outputs are mapped based on the selected HF-6 m
band as shown below. This mapping matches that
of some third-party band decoders. On Transverter
bands, BAND0-3 will all be set to zero.
Band BAND3 BAND2 BAND1 BAND0
160 m 0 0 0 1
80 m 0 0 1 0
60 m 0 0 0 0
40 m 0 0 1 1
30 m 0 1 0 0
20 m 0 1 0 1
17 m 0 1 1 0
15 m 0 1 1 1
12 m 1 0 0 0
10 m 1 0 0 1
6 m 1 0 1 0
If CONFIG:KIO3 is set to
TRN
, BAND0-3 reflect
the parameters of
CONFIG:XVn ADR
as shown
below. On HF-
6 m t hey’ r e s e t t o 0.
ADR
BAND3 BAND2 BAND1 BAND0
T R N1
0 0 0 1
T R N2
0 0 1 0
T R N3
0 0 1 1
T R N4
0 1 0 0
T R N5
0 1 0 1
T R N6
0 1 1 0
T R N7
0 1 1 1
T R N8
1 0 0 0
T R N9
1 0 0 1
With
CONFIG : KIO3
set to HF-TRN , the
BAND0-3 outputs follow the
NO R
table when HF-
6 m bands are selected, and the
TRN
table when a
transverter band is selected.
Transve rte r Control
Normally, when the K3 is turned on, a 5-VDC logic
signal appears on ACC pin 7 (K3 ON). T his could
be used with Elecraft XV transverters as an enable
signal (pin 8 of J6 on the transverter).
However, pin 7 can alternatively be configured as a
transmit inhibit
input line for use in multi-
transmitter stations. (See TX INH , below.) In this
case it is not available as a power-on signal for
El ecr af t t r ans ver t er s . I ns t ead, t he K3’ s 12
-VDC
switched output line could be used.
For transverter keying, you can use KEYOUT -LP
signal (pin 10 of the ACC connector) or the KEY
OUT jack (RCA).
With
KIO3
set to TRN or HF-TRN , the DIGOUT 0
line (ACC, pin 6) will output 0 V when low power
mode is selected for the current transverter band
(
CONFIG:XVn PWR
). At all other times,
DIGOUT 0 will be floating (Hi-Z).
The K3’ s BAND0
-2 outputs emulate the
El ecr af t K60XV’ s XVTR0
-2 signals when
CONFIG:KIO3 is set to
TRN
or
HF-TRN
.
However, BAND0-2 on the K3 are open-drain
signals, while XVT R0-2 on the K60XV are TTL.
TX INH ( Transmit Inhibit Signal)
Pin 7 of the ACC connector can be configured as a
transmit inhibit input by setting
CONFIG:TX INH
to
LO = I nh
(or
HI = I nh
). Holding pin 7 low (or
high) will then prevent transmit. An external 2.2 to
10 K pull-up resistor (to 5 VDC) is required.
If TX INH is set to
O FF
, pin 7 reverts to its
default output function, K3 ON (see above).
Ele craft KRC 2 Unive rsal Band De code r
An Elecraft KRC2 can be used with the K3 to
perform station switching functions; it includes sink
and source drivers for all bands. The KRC2 uses the
AUXBUS rather BAND0-3 (see
CONFIG:KRC2
for 6-meter band mapping). Refer to the KRC2
instruction manual for more information.