Table of Contents
Advertisement
ae
The figure below shows the frequencies relationship.
2295Hz
2125Hz
170Hz
4
'
[|
SSB Filter
n
!
'
'
'
1
'
4
i
H
`
I
.
`
1 CW Filter
`
I
`
f
7
`
14.09771MHz
14.09788MHz
14.10000MHz
SPACE
MARK
RX CARRIER
3-8-2.
Transmit
Note:
Key down periods of 1 hour will require a cool down
period of approximately 30 minutes.
1. Ensure that your terminal is set up for AFSK type
keying.
2. Connect
the terminal
units AFSK
output jack to
TS-A40S/44X
AFSK
IN jack,
and
the terminal
unit's AFSK input jack to the TS-440S/44X AFSK
OUT jack on the rear panel of the transceiver. The
terminal
units standby
(PTT) terminal
should
be
connected to the standby terminal on the REMOTE
connector of the TS-440S/44X.
(See page 11 for
the REMOTE terminal pin configuration.)
3. Place the MODE key on the TS-440S/44X to AFSK,
and the Meter switch to ALC.
4. To transmit, either place the SEND/REC switch on
the TS-440S/44X to SEND, or use the PTT signal
from your terminal unit.
5. When using AFSK, you can also apply your trans-
mit signal tones to pin number 1 of the microphone
connector, if you do not wish to use the two jacks
on the rear of the TS-440S/44X.
To adjust the
power output in AFSK, increase or decrease the
MIC gain control setting. A mid-scale ALC reading
will yield full power output.
Notes:
1. AFSK operation requires terminal unit designed to
supply this type of operation. You cannot use FSK
tones with a AFSK jack!
2. The AFSK
oscillator circuit should provide audio
tones of 2125 and 2295
Hz. Lower tones may
cause spurious output due to the higher harmonic
content present with these lower frequencies.
3. The TS-4408/44X and RTTY terminal unit should
use separate power supplies, in order to prevent RFI
(Radio Frequency Interference).
4. During
AFSK
mode
operation
the
microphone
switch should be OFF, or the microphone discon-
nected, if you are using the AFSK jacks on the rear
panel.
5. AFSK operations utilize the LSB Mode. AMTOR uti-
lizes USB, or reversed tone pairs.
6. The AFSK input level should be less than 100 mV.
3-9.
OPERATION
WITH A LINEAR AMPLI-
FIER
The TS-440S/44X may be operated with any conven-
tional linear amplifier which will accept up to approxi-
mately 125 watts of RF drive, has a low current DC
operated keying circuit, and returns approximately — 8
to — 1 VDC ALC back to the exciter. Please note that
in order to operate full OSK (FULL break-in) the linear
amplifier must also be QSK capable.
Refer to the REMOTE connector diagram on page 11
and section 5-8-10..
Initial linear amplifier tune-up should be performed with
the TS-440S/44X set for approximately 50 watts out-
put to reduce wear and tear on both the linear, and the
TS-440S/44X. Use of a dummy load is strongly recom-
mended,
since
the
bands
are
already
sufficiently
crowded.
19
Advertisement
Table of Contents
