Kenwood TM-3530A Instruction Manual page 24

Control signals for CHL operation
Control signal :
& : The control signal with channel data Beep: Beep 1
Z : The control signal with no channel data
DCL system indicator ON
Flashing CHL indicator +<——+——_—__——_ CHL indicator ON
j<-—*1 Beep 2
Time > 1
DCLSW
CHLSW
r
ON ON Fe
Time — Original RX freq. —\-— Open channel RX
asy
Fig. a. Simplex mode
DCL system indicator ON
Flashing CHL indicator ———————— CHL indicator ON —
Beep 2
Time — 4 TBeep 1
ON On Sub tone Z Sub tone
1
'
Time —= Kigr tha atl Original RX freq.<t--+-» Open channel receive
PTT SW asy
ON
Approx. 1 sec.
PTT SW
OFF
Fig. b. Offset mode (TM-3530A/2570A/2550A/2530A)
DCL system indicator ON
ae Flashing CHL indicator "fea beep 2 ON>
jeep pas PI jeep 2
Time —~ 1 1 Beep 1 1
peLsw CHLSW
ON 750 Ha ie Z Bi
tone
Tine <a t t Original RX trea ey Open channel RX
TONE SW TONE SW PTTSW asy
ON OFF ON Approx. 1 sec. pie sw
Fig. c. Offset mode (TM-2550E)
G. Control signal of DCL system
The DCL control signal consists of: 1) Bit/frame sync DCL operation control signal
signal for distinction of the DCL signal from noise or YZ The control signal with no channel data
other data communication signals; 2) 5-digit digital code
data for station recognition; 3) Open channel data; and 4) —_____DCL system indicator lighting
Call sign data which is a combination of alphanumeric i G YZ
data. Auxiliary data is also provided for future system ex- Time >
pansion. This control signal is transmitted at a speed of ese art
1200 baud, requiring approx. 0.2 seconds, which has al- . .
most no effect on normal communication. A beep sound, Fig. a. Simplex mode
peculiar to DCL, (similar to the sound of "packet radio") is DCL system indicator ON
heard when this signal is received.
ie
Sub tone Z Sub tone
Time = cel gw __Aapron Text
PTT SW
ON
'Synchronizing signal ius Fig. b. Offset mode
Digital Channel Call sign
ine ane
(TM-3530A/2570A/2550A/2530A)
[= system indicator ON_____
Auxiliary
! t
THE 'Approx 1 sec!
ono" PTTsw
ON
Composition of control signal
24
Fig. c. Offset mode (TM-2550E)