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In the unlikely event that CPU clock noise is present on a particular operating
frequency programmed into the radio, you can shift the CPU clock frequency to avoid
the CPU clock noise, which normally is so weak that it is inaudible even if the radio is
tuned exactly to its frequency.
CPU clock can be shifted in the set mode.
6 Operation 2 (Applications)
6-1 Selective Calling
When you communicate with the specific station, tone squelch function or DCS
function is useful.
The tone squelch function allows to transmit one of 39 kinds of sub-audible tones
with a voice. Then the voice can be heard when the sub-audible tones match at
the receiving side.
The DCS function allows to transmit one of 104 kinds of digital codes with a voice.
Then the voice can be heard when the programmed codes match at the receiving
side.
. The tone squelch function and DCS function can not be used at the same time.
6-2 Tone Encoder and Tone Squelch Function
1. Press and hold the F key, then press 4/TSQL key while F icon is ON, the current
mode and tone frequency are displayed. Each time 4/TSQ key is pressed, the
mode is switched as follows:
T T/SQ
... 88.5 ....... 88.5 ... TCS-OF .....
..........................................
. Only T appears indicating the encoder function setting only is allowed.
. T SQ appears indicating encoder/decoder function setting.
. While the tone frequency is displayed, the lamp function and MONI key are
available.
Press any key (except for FUNC and MONI keys) to complete the setting. The
LCD returns to the ordinal mode with T/TSQ indication.
2. While the tone frequency is displayed, rotate the dial clockwise to increase or
counterclockwise to decrease the tone frequency. The tone frequency for use can be
selected from 39 reference tones described below.
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67.0
69.3
71.9 74.4 77.0 79.7 82.5 85.4 88.5 91.5
94.8
97.4
100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3
131.8
136.5 141.3 146.2 151.4 156.7 162.2 167.9 73.8
186.2 192.8
203.5 210.7 218.1 225.7 233.6 241.8 250.3
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3. Press any key (except for FUNC and MONI keys) to complete the setting. The
LCD returns to the frequency indication mode.
6-3 Tone Encoder Frequency/Tone Decoder Frequency Programming
The tone encoder frequency and tone decoder frequency can be programmed
respectively to each memory CH.
179.9
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