Icom Ic_r20 Communications Reciever Instruction Manual

48
9
COMFORTABLE RECEIVING
■Tone scanBy monitoring a signal that is being operated with pocket
beep, tone or DTCS squelch function, you can determine the
tone frequency or DTCS code necessary to open a squelch.
qSet the frequency to be checked for a tone frequency or
code.
wTurn the desired tone type, tone squelch or DTCS, ON by
holding [7 TONE]with turning [R-DIAL].•One of “TSQL” or “DTCS” appears. 
•Even when the pocket beep function is activated, the function is
cancelled when starts the tone...

49
SET MODE
10■GeneralSet mode is used for programming infrequently changed val-
ues or conditions of functions.
In addition, the IC-R20 has an expanded set mode which is
used for programming even more infrequently changed val-
ues or conditions of functions. When turning the expanded
set mode OFF, only about one third of the set mode items are
displayed for simple operation.D D
Set mode entering and operationqPush [8 SET]for 1 sec. to enter set mode.
wRotate [R-DIAL]to select the desired item, then...

50
10
SET MODE
■Set mode itemsThe following items are available in the set mode and ex-
panded set mode.D D
General set mode itemsD D
Expanded set mode items
†Available for the USA version only.
***-SET-MODE-***
-DTCS-CODE >TONE-FREQ -DUPLEX -OFFSET-FREQ -SCOPE-AF-OUTPUT -SCAN-STOP-BEEP ----------------***-SET-MODE-***
-CI-V-BAUD-RATE >CI-V-ADDRESS -WX-ALERT -LCD-CONTRAST -BANK-LINK -DTCS-POLARITY ----------------***-SET-MODE-***
>CI-V-TRANSCEIVE -CI-V-BAUD-RATE -CI-V-ADDRESS -WX-ALERT -LCD-CONTRAST...

51
10
SET MODE
D D
Priority watch
Turn the priority watch or priority beep (priority watch with
beep emission capability) ON. (default: OFF)
•ON: Start priority watch after exiting set mode.
•BELL : Emits beeps and blinking “S” indicator when
a signal is received on the priority frequency.D D
Key-touch beepThe key-touch beep can be turned OFF for silent operation.
(default: ON)
D D
Beep output levelAdjust the key-touch beep tone level to the desired level
within 39 levels.
The key-touch beep (previous...

52
10
SET MODE
D D
Power save
The power save function reduces the current drain to con-
serve battery power. This power save function can be turned
OFF, if desired. In the default setting (“AUTO” selection), the power save func-
tion is activated in 1:4 
(125 msec.: 500 msec.)
ratio when no sig-
nal is received for 5 sec. The ratio becomes 1:8 
(125 msec.:
1sec.)
when no signal is received for another 60 sec.
D
D
Noise blankerThe noise blanker reduces pulse-type noise such as that gen-
erated by...

53
10
SET MODE
D D
AM antenna selection
This setting is activated only for the AM broadcast band,
0.495–1.620 MHz (differ according to version) reception.
•EXT : Use the antenna connected to the antenna con-
nector. (default)
•BAR: Use the internal bar antenna for AM broadcast
band reception.
D D
FM antenna selection
This setting is activated only for the FM broadcast band,
76.000–107.995 MHz (differ according to version), recep-
tion.
•EXT : Use the antenna connected to the antenna
connector. (default)...

54
10
SET MODE
D D
Dial speed acceleration
The dial speed acceleration automatically speeds up the tun-
ing dial speed when rotating [R-DIAL]rapidly.
•OFF : The dial speed acceleration is turned OFF.
•ON: The dial speed acceleration is tuned ON. 
(default)D D
Monitor key actionThe monitor key, [SQL], can be set as a ‘sticky’ key. When
set to the sticky condition, each push of [SQL]toggles the
monitor function ON and OFF.
•PUSH : Pushing and holding [SQL]to monitor the fre-
quency. (default)
•HOLD : Push...

55
10
SET MODE
D D
Scan pause timer
Selects the scan pause time. When receiving signals, the
scan pauses according to the scan pause time.
•2–20 : Scan pauses for 2–20 sec. on a received signal,
and selected in 2 sec. steps. (default: 10 sec.)
•HOLD : Scan pauses on a received signal until it disap-
pears. Rotate [R-DIAL]to resume manually.
D
D
Scan resume timerSelects scan resume time. Scan resumes after the specified
period when the received signal disappears.
•0: Scan resumes immediately when the...

56
10
SET MODE
D D
Scope audio output
Sets the audio output function while scope operation.
The scope audio output is used for finding out the signals
while scope function are modulated, unmodulated or beet
signal etc.D D
Offset frequencySets the duplex offset frequency for each frequency band in-
dependently within 0 to 159.99999 MHz range. During duplex
operation (–DUP or +DUP), the monitoring frequency (while
[SQL]is pushed) shifts the set frequency. 
The default value may differ according to the...

57
10
SET MODE
D D
Tone frequency
Sets subaudible tone frequency for tone squelch operation.
Total of 50 tone frequencies (67.0–254.1 Hz) are available.
(default: 88.5 Hz)
•Available subaudible tone frequencies D
D
DTCS code Sets DTCS code for DTCS squelch operation. Total of 104
codes (023–754) are available. (default: 023)•Available DTCS code
The polarity can also be set in “DTCS polarity” as follow.
D D
DTCS polaritySets DTCS polarity from normal and reverse.
(default: NORMAL)
DTCS-POLARITY
-REVERSE...