Kenwood TM-3530A - Manual (Page 32)

1. Standby digital code
The standby indicator is a visual indication of which
digital access codes will actually open the squelch on
the radio. Simply stated it shows the "Active" codes.
When the indicator is "ON" the code is active, when
the indicator is "OFF" the code is not active, and is ig­
nored.
Fig. 1 illustrates an example code with the standby in­
dicator "ON" (active).
The code that is displayed when the CS key is pressed
"ON" (called a "Transmit digital code") becomes an
active code regardless of the standby indicator. For
example, the digital codes as shown in Fig. 2 are
stored in station As memory. Digital codes a, b and d
are active codes. If station B transmits the proper
code (a, b or d) he will open the squelch of station A.
When station A receives one of the active digital
codes, the microprocessor will determine if the re­
ceived code matches the current transmit code. If the
codes do not match, the microprocessor will change
the transmit digital code so that it matches the incom-
ming digital code.
For example, if station B transmits a signal with code
d (Fig. 2), the squelch of station A will open. Simulta­
neously, station As transmit digital code (a in Fig. 2)
will be changed to d. This may be confirmed by press­
ing the CS key. Code d will be displayed.
2. If the CHL indicator CHL is "ON" you will not be able
to initiate, or receive channel linkage information.
This is to prevent accidental channel linkage.
3. Detection of open channel
When the squelch is closed (C.TUN indicator is off)
for more than 1.5s, the channel is determined open.
Occasionally, channel linkage may occur on a busy
channel due to transients in the microprocessor.
4. Automatic transmission of channel linkage data is not
performed after finding an open channel, if another
station is transmitting on the original channel at the
time the radio returns to the original channel. The ra­
dio will enter the receive mode, and waits for a com­
mand to send the data.
5. Channel linkage during scan operation
Channel linkage cannot be actuated during scanning.
4-8-9. DCL system notes
r
m
m
ra m
B3 ^0
□ n □ oc
f O D U
I L U I
Digital code when
the CS key is ON.
I i i I
I t f f
★ /
(
C
U J D
" i Ji L
. J I J 3
L I L 3
★ /
I
O O 3 c
3 U f u
o
6. Normal transmission using PTT switch
When the DCL switch is ON, data is transmitted for
approx. 0.2 seconds at the beginning and at the end­
ing of the transmission: Wait a short period before
start talking after this moment.
7. Offset switch
When the [OS| key is not set to simplex, automatic
transmission of DCL data from the original frequency
does not occur. Pressing the PTT switch manually
transmits data and causes movement to the open
channel.
8. When channel linkage is initiated, the original operat­
ing frequency, offset and tone frequency are stored
into memory. The open channel operates in simplex
with no tone, regardless of original settings.
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