Chapter 14 Interfacing To Peripherals; Sp/Mic Jack; Selecting Sp/Mic Jack Function; Sp/Mic - Kenwood TH-F6A Instruction Manual

INTERFACING TO PERIPHERALS

SP/MIC JACK

The SP/MIC jack on the transceiver can be
configured to interface to various kind of the
peripherals available for the transceiver, such as a
speaker microphone (SMC-32/ 33/ 34), PC interface
cable and a TNC. Access Menu No. 9 (SP/MIC
JACK) and select the peripheral type from "SP/MIC",
"TNC", and "PC".
You can further configure the transceiver to interface
to a high speed (9600 bps) TNC that requires a direct
FM modulation {below}.

SELECTING SP/MIC JACK FUNCTION

Unless you connect the transceiver to a TNC or PC,
the default setting of the SP/MIC jack function (Menu
No. 9), "SP/MIC" works fine. However, if you want to
interface to a different type of peripheral, configure
the SP/MIC jack function:
1 Press [MNU] to enter Menu mode.
2 Turn the Tuning control or press [ ]/ [ ] to select
Menu No. 9 (SP/MIC JACK).
3 Press [ ] or [MNU].
4 Turn the Tuning control or press [ ]/ [ ] to select
the appropriate peripheral type from "SP/MIC"
(default), "TNC", and "PC".
S / P M C I
F n u i t c n o
S p e a k r e
S / P M C I e a p r h o n , e
s a t u t s s u
T N C T N C i w h t
P C i w h t h t
P C
s f o w t a e r
5 Press [ ] or [MNU] to store the setting.
Otherwise, press [ ] or [PTT] to cancel.
• If necessary, configure and select the
additional settings.
6 Press [ ] (POWER) to turn the transceiver OFF.
7 Connect a peripheral to the SP/MIC jack.
8 Press [ ] (POWER) to turn the transceiver ON.
P e i r h p r e l a y T e p
m c i o r h o n , e h e a d s e , t
T N C i w h t o t u a s q u e c l h
p p o t r
a s q u e c l h s a t u t s s u p p o t r
e m e m o y r c h a n n e c l o n r t
f r o h t e t a r n c s e v i r e

SP/MIC

If you plug the speaker microphone or headset
into the SP/MIC jack, access Menu No. 9 and
select "SP/MIC" (default). To emulate the
programmable function keys using external keys
in order to control the transceiver, refer to the
circuit diagram below {page 38}.
SP
TH-F6A/ TH-F7E
MIC
Note 1:
Voltage is developed across a 100 resistor on the 3.5 V line in
the transceiver. When 2 mA flows, approximately 3.3 V is
developed.
Note 2:
A 10 F capacitor is not required in the following cases.
• When other equipment has DC blocking capacitors.
• When a 2-terminal electret condenser microphone is used.

TNC

If you want to utilize the squelch status on your
TNC, access Menu No. 9 and select "TNC". From
the TNC, make the interface cable that connects
to SP/PRD, MIC/PKD, PTT, REM/SQ, and GND
on the transceiver SP/MIC jack terminal. In
addition, if your TNC supports 9600 bps packet
l o
(G3RUH/ GMSK 9600 bps modem), access Menu
No. 28 (PACKET) and select "9600" bps. This
option allows you to transmit/ receive packet
signals in a direct FM modulation/ quadrature
detector output. You must use the A-band to
transmit and receive 9600 bps packet signal.
The following diagram shows the available
terminals on the SP/MIC jack for the TNC.
Demodulator output
Speaker output
Remote input
Squelch output
3.5 V DC
Modulation input
Microphone input
PTT input
Note:
When you select 9600 bps for Menu No. 28 (PACKET), you
cannot monitor the sound from the speaker. Select 1200 bps
for Menu No. 28 (PACKET) when you return to normal
operation.
While the VOX function is turned ON, Menu No. 28
(PACKET) returns to 1200 bps {page 41}.
2.5 mm
Plug
3.5 mm
Plug
3.5 V 10 F
Microphone
Note 1 Note 2
High speed
(9600 bps)
Normal SP/PRD
(1200 bps)
REM/SQ
GND
3.5 V
High speed
(9600 bps)
MIC/PKD
PTT
Normal
(1200 bps)
Speaker
To TNC RX
audio input
To TNC
DCD input
2.5 mm
Plug
GND
NC
3.5 mm
Plug
PTT
To TNC TX
audio output
45