Remote Control Function - Kenwood TS-850S Instruction Manual

4-20. Remote control function
The front panel keys can be operated remotely via the remote control terminal (ACC3) on the rear. The
following eleven functions can be remotely controlled.
PLAY-1, PLAY-2, PLAY-3, REC-1, REC-2, REC-3, CLR,
TF-SET, QUICK M.IN, QUICK MR, VOICE
The remote control terminal circuit in the transceiver is as follows. When the A/D converter terminal voltage
reaches the voltage determined by the built-in program, the microprocessor performs operations according to
the terminal voltage. For example, if a 4.7kohm resistor is connected between + and - of the remote control
terminal, the A/D converter input voltage becomes about 2 V, and the QUICK MR function operates.
You can make your own remote control keyboard to suit your needs by providing the necessary remote control
switches.
The terminal voltages and resistance values required for operating each of the functions are as follows:
Function
Terminal voltage
R Resistance [0]
(V, median value)
PLAY-1 0.22""0.36 (0.29) 150
PLAY-2 0.42 ....... 0.56 (0.49) 270
PLAY-3 0.61 ....... 0.75 (0.68) 412 (390+22)
REC-1 0.80""0.94 (0.87) 582 (560+22)
REC-2 0.99 ....... 1.13 (1.06) 820
REC-3 1.18 ....... 1.32 (1.25) 1.1k (1k +100)
CLR 1.38 ....... 1.52 (1.45) 1.5k
TF-SET 1.57""1.71 (1.64) 2.07k (1.8k+270)
QUICKM.IN 1.76""1.90 (1.83) 3.03k (2.7k +330)
QUICKMR 1.95""2.09 (2.02)
4.7k
VOICE 2.14""2.28 (2.21) 8.42k (8.2k + 220)
• Use non-locking switches that are open when off (N.O.).
• Use a shielded cable or a coaxial cable to connect the terminal and switches.
• Use resistors with a tolerance of 5% or better.
• If a function does not work with a specified resistance, increase or decrease the resistance until the voltage
on the positive side of the remote control terminal is in the specified range.
• If two switches are pressed together, the result is unpredictable.
TS-850
Notes
Shielded or coaxial cable
+ -
r--------------,j--------------------~
~~--------------~
,,
----''v"v"v----
-o ,....,_ ___ _
4. 7k
Q
Switch 1
(non-locking
type)
When the remote control plug is inserted, and switch 1
is closed, the voltage on the positive side of the remote
control terminal becomes about 2 V, and the QUICK MR
function operates. Set the value of R to suit the desired
function.
1. Do not apply any voltage to the ACC3 terminal from an external source.
Not used
~
2. Use standard plugs (3.5 mm in diameter). If a stereo plug is used, do not
use the middle (ring) terminal.
+