Kenwood TS-850S - Manual (Page 57)

The front panel keys can be operated remotely via the remote control terminal (ACCS) 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.
4-20. Remote control function
The terminal voltages and resistance values required for operating each of the functions are as follows:
Function
Terminal voltage
(V, median value)
R Resistance [D]
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)
QUICK M.IN 1.76~1.90 (1.83) 3.03k (2.7k+ 330)
QUICK MR 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
cki
Shielded or coaxial cable
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.
Notes
1. Do not apply any voltage to the ACC3 terminal from an external source.
2. Use standard plugs (3.5 mm in diameter). If a stereo plug is used, do not
use the middle (ring) terminal.
Not used
1 I