Kenwood Th-K2at/e, K2e/t, K4at, K4e Transceiver Instruction Manual

							97
1Press [MENU] then turn the Tuning control to select
Menu No. 20 (VOX).
2Press [MENU] and turn the Tuning control to select
the desired VOX gain level from 1 (least sensitive) to
9 (most sensitive).
¥ To turn OFF the VOX function, select ÒOFFÓ in step 2.
Note:
uWhile in Menu Mode {page 24}, the VOX function is temporarily
disabled.
uSince the VOX circuit must detect the presence of your voice, you
may notice a slight delay in transmission; the very first part of
your message may not be transmitted.
uWhen the VOX function is ON, the ASC function turns OFF.uVOX cannot be used with an optional Speaker/ Microsphone.
VOX Gain
To enjoy the VOX function, take the time to properly
adjust the VOX Gain level.  This level controls the VOX
circuit to detect the presence or absence of your voice.
There are 2 ways to adjust the VOX Gain.
While the VOX function is ON:
1Continue from step 1 and 2, above.
Press [MENU] to turn the VOX function ON, then
press any key other than [LAMP], [MONI/SQL] and
[MENU] to exit Menu Mode.
2Speak into the headset microphone using your
normal tone of voice to transmit. 
						

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 ¥ If the transmission does not begin, you must
readjust the VOX Gain so that transeiver
transmits while you are speaking.  To readjust the
gain, press and hold [PTT] then turn the Tuning
control to select a more sensitive gain level.
 ¥ While readjusting the gain, you can release
[PTT].  The transceiver will remain in Adjustment
Mode for approximately 5 seconds.
3Adjust the VOX Gain by turning the Tuning control
until the transceiver reliably switches to transmission
mode each time you speak while the transceiver is
transmitting.
From the Menu:
1Continue from step 1 and 2 from VOX (Voice-
Operated Trasmission) on page 97.
2Press [MENU] to store the VOX Gain level.
¥ÒVOXÓ appears on the bottom right of the display when
the VOX function is ON.
3Press any key other than [LAMP], [MONI/SQL] and
[MENU] to exit Menu Mode.
4Adjust the VOX Gain, performing steps 1 to 3 until
the transceiver reliably switches between
transmission and reception each time you speak.
¥ The setting should not allow background noise to
switch the transceiver to Transmission Mode. 
						

							99
VOX Delay Time
If the transceiver returns to Reception Mode too quickly
after you stop speaking, the end of your transmission
may not be sent.  To avoid this, select an appropriate
delay time that allows your entire transmission to be
sent, before Transmission Mode ends.  However, do not
make the delay overly long.
1Press [MENU].
2Turn the Tuning control to select Menu No. 22 (VD).
3Press [MENU].
4Turn the Tuning control to select the desired delay
time from 250, 500 (default), 750, 1000, 1500, 2000
and 3000 ms.
5Press [MENU] to store the setting or [PTT] to cancel.
6While speaking into the microphone using your
normal tone of voice, adjust the VOX delay time,
performing steps 1 to 5 until the transceiver reliably
switches between transmission and reception each
time you speak.
Note:
uIf you press [PTT] while the VOX function is ON, the VOX Delay
Time is not reflected to the transmission.
uIf you press [CALL] (if 1750 Hz is programmed) {page 35} to
transmit a 1750 Hz tone, the VOX Delay Time is not reflected.
uIf the DCS function {page 73} is ON, the transceiver remains in
Transmission Mode for the duration set by the VOX Delay Time. It
then sends a Turn-Off Code to close the receiving partyÕs squelch. 
						

							100
VOX on Busy
You can configure the transceiver to force VOX
transmission even if the transceiver is receiving a
signal.
1Press [MENU].
2Turn the Tuning control to select Menu No. 21
(VXB).
3Press [MENU].
4Turn the Tuning control to select ÒONÓ.
¥ To suppress the VOX transmission when the
transceiver is receiving a signal, select ÒOFFÓ.
5Press [MENU] to store the setting or [PTT] to cancel.
Note:  You can press [PTT] or [CALL] (if 1750 Hz is programmed) totransmit, regardless of Menu No. 21 (VXB) settings. 
						

							101
OPTIONAL ACCESSORIES
KHS-21
HeadsetHMC-3
Headset (with VOX/ PTT) EMC-3
Clip Microphone with
EarphoneBT-14
Battery Case (6 AA/ LR6)KSC-24
Rapid Charger
BC-21
Battery Charger 
						

							102
PG-3J
Cigarette Lighter Power
Cable
PG-4Y
PC Interface CableSMC-32
Speaker Microphone
PG-2W
DC Power Cable
PB-43N
Ni-MH Battery Pack
(7.2 V/ 1100 mAh) MCP-1A
Memory Channel Control
Software
Refer to pages 105 and 107. 
						

							103
SMC-34
Speaker Microphone (with
PF keys and VOL control)SMC-33
Speaker Microphone
(with PF keys) 
						

							104
INTERFACING TO PERIPHERALS
SP/MIC JACK
The SP/MIC jack on the transceiver can be configured
to interface to various kind of peripherals available for
the transceiver, such as a speaker microphone
(SMC-32/ 33/ 34) and PC interface cable (PG-4Y).
Access Menu No. 31 (PC) and select ÒONÓ or ÒOFFÓ.
SP/MIC
If you plug the speaker microphone or headset into the
SP/MIC jack, access Menu No. 31 and select ÒOFFÓ
(default).  To emulate the programmable function keys
using external keys (to control the transceiver), refer to
the circuit diagram below.
5.0 V10 mF
PTT
LOCK SW
SW-1   3.9k
SW-2    10k
SW-3    27k
SP/MIC jack
SP
MICSpeaker
Microphone
Note 1
Note 22.5 mm
Plug
3.5 mm
Plug 
						

							105
Note 1:  Voltage is developed across a 100W resistor on the 5 V line in
the transceiver.  When 2 mA flows, approximately 4.8 V is developed.
Note 2:  A 10 mF capacitor is not required in the following cases:
¥ When other equipment has DC blocking capacitors.
¥ When a 2-terminal electret condenser microphone is used.
PC
To connect the transceiver to a PC in order to manage
the memory channels in the transceiver, use the PG-4Y
PC interface cable.  You will also need the supported
software to manage the memory channel contents of the
transceiver.  To download the software, access the
following URL:
http://www.kenwood.com/i/products/info/amateur.htm.
To use the software, access Menu No. 31 and select
ÒONÓ {page 107}.
For your reference, the following diagram shows how
the transceiver communicates to the PC using a serial
(COM) port.
RXD
DTR
DSR
GND
RTS
CTS
TXD
SP
MIC
Note:  Contact an authorized KENWOOD dealer for the PG-4Y, PCInterface cable availability.
2.5 mm
Plug
SP/MIC jackLevel
converter
COM port
3.5 mm
Plug 
						

							106
nUsing the PG-4Y PC Interface Cable
Use the PG-4Y PC interface cable to connect
between the transceiver and PC.  Plug the Speaker/
Microphone connector to the SP/MIC jack and DB-9
connector to one of the COM (serial) ports on your
PC.
PC