Key Connection - Kenwood TS-120S Operating Manual

4.6 CW OPERATION (Fig. 4-8)
For CW operation, your transmit frequency should be
"zeroed" to the transmit frequency of your contact station.
Receive frequency is 800 Hz lower than the transmit fre-
quency of your contact station, so that his signal is received
as a 800-Hz beat note. This also allows your contact to
receive your signal without having to retune receiver.
Tuning methods are detailed in the following paragraphs.
Contact station frequency
Receive frequency
t
Transmit frequency Sy
!
!
oe
Beat signal
Your frequency
Transmit frequency Receiver frequency
Beat note
Fig. 4-8 Tuning for CW Operation
4.6.1. OPERATION WITHOUT OPTIONAL CW FILTER
Set the IF SHIFT control to its center position and the RIT
switch OFF. Adjust the main tuning knob for an 800-Hz
beat note and your transmit frequency will then coinside
with that of your contact station ("zeroed"). During recep-
tion, the side-tone monitor is activated by pressing down the
key (VOX OFF). In this case, listen to the side-tone superim-
posed on the receive signal and adjust the main tuning for
similar side-tone and incoming CW avoid tone. By so doing,
transmit frequencies will be zeroed.
You may now adjust the RIT for a pitch which suits your
preference. If intereference is encountered, adjust the IF
SHIFT. For more convenient and effective CW operation,
use of the optional YK-88C CW crystal filter is recommend-
ed.
4.6.2. OPERATION WITH CW FILTER (YK-88C)
Set the IF SHIFT to its center position and the RIT to OFF.
Adjust the main tuning knob for maximum deflection of the
S-meter. Receive signal pitch will be about 800 Hz, in-
dicating correct tuning.
4.6.3 KEY CONNECTION (Fig. 4-9)
Your key should be connected as illustrated in Fig. 4-9 when
using an electronic keyer, make sure that polarity is correct.
Always use shielded line from the key to transceiver.
TS-120V
Before connecting, check that the
polarity is connect. The KEY jack
provides +9V. Use shielded
cable
Fig. 4-9 Key Connection
4.7 MOBILE OPERATION (Fig. 4-10)
The TS-120S(V), being compact in design, is ideal for mobile
operation. Satisfactory mobile operation is achieved
through proper power and antenna connection, and thought-
ful transceiver installation and adjustment.
4.7.1. TS-120S(V) INSTALLATION
Secure the TS-120S(V) under the dashboard using an op-
tional MB-100 mounting bracket as shown in Fig. 4-10. As
an
alternative, use
strapping, making
sure that the TS-
120S(V) will not slip out of place while driving the vehicle.
NOTES:
1. Do not install the TS-120S(V) near the heater outlet.
4.7.2. HOW TO HANDLE THE POWER CABLE
When connecting or disconnecting the power cable to or
from the power connector, be sure that the power switch is
always in the "OFF" position. Observe polarity of the cable.
The TS-120S(V) operates on 13.8 VDC, negative ground.
Battery polarity must be correct. The power cord is color
coded:
CAUTION: Observe battery polarity.