588 manual
Second release – August 2007
17
Part #74409
Printed in USA
1 jack to accessory equipment. The cable is
color-coded as follows: WHITE = pin 1, line
level audio input. YELLOW = pin 4, line
level audio output. RED = pin 5, FSK.
BLACK = pin 3, push to talk. Ground from
the 46176 cable is connected to pin 2.
Pin 1 is used for a line level audio input from
an accessory device (like a TNC or sound
card for digital mode operation).
Pin 2 is ground.
Pin 3 is a PTT connection. In SSB and AM
modes, when grounded, the radio begins
transmitting. This would be the place to
connect a PTT footswitch for voice modes.
In CW mode, this pin can also be used as a
keying input for an external device like an
external keyer or output of CW sent from a
computer (like with a computer logging
program for radio contesting).
Pin 4 is line level audio output.
Pin 5 is the FSK mark/space input. 5 volts =
1 = mark, 0 volts = 0 = space. See
FSK
OPERATION
section in Chapter 4.
(32) ACC 2
No connection. For future use.
(33) REM POD
The REM POD jack is used for connection
of the model 302R accessory remote
encoder/keypad, allowing armchair tuning
and control of transceiver functions. See
REMOTE F1
,
REMOTE F2
, and
REMOTE
F3
in Section 4 for information on control
functions.
(34) SERIAL
The serial data connector is used for both
loading Flash-ROM updates into the
transceiver and for local computer control of
radio. One of the great features about
OMNI-VII is that the latest version of the
radio is always available from our firmware
update website.
Complete computer control of the OMNI-VII
is possible via the SERIAL connector.
A programmers reference guide and the
latest version of the radio firmware are
located on Ten-Tec’s firmware update site at
www.rfsquared.com
Brief instructions on firmware updating your
transceiver are provided in
UPDATING
OMNI-VII FIRMWARE
in Section 5.
(35) AMP KEY
OMNI-VII is equipped with an open-collector
transistor amplifier keying output, accessible
via the AMP KEY jack.
AMP KEY is typically used as a non-QSK
keying connection for a linear amplifier.
However, it is acceptable to connect QSK
linear amplifiers that do not employ a full
break-in keying loop to this jack as well.
RF appears at an antenna connector
approximately 15 mS after AMP KEY closes.
Amplifier keying is independent of antenna
selection, meaning that an amplifier
interfaced to AMP KEY can be routed via
either the ANT 1 or ANT 2 jack.
An adjustable delay (titled EXT T/R DELY
in the menu) gives the operator the ability to
keep the amplifier keyed longer, preventing
drop outs between words of SSB VOX or
CW operation. See
EXT T/R DELY
in
section 5.
Your external amplifier key line should not
employ an AC relay for transmit switching,
nor apply more than +100 Vdc (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 high
voltage on the keying line. Such amplifiers
require a relay or transistor switch between
the OMNI-VII’s AMP KEY jack and the
amplifier keying line. 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.
See
CONNECTING AN EXTERNAL
LINEAR AMPLIFIER
in Section 5 for a
complete description on interfacing a linear
to the OMNI-VII.
(36 & 37) TX EN / TX OUT
Many QSK linear amplifiers are equipped
with a full break-in keying loop to assure
proper sequencing of amplifier keying when
operating full break-in CW. TX EN and TX
OUT are used for a full break-in linear
amplifier keying loop. Do not connect more
