Kirisun PT558, Service Manual

Page: 10 / 28

conducted for over 10 seconds, the battery power saving will be
activated. When it is receiving signals or in operating state, battery
power saving is inactive.
4.1.6 Low Battery Warning
When the battery power appears low, the indicator flashes. If
the battery power is lower than the preset value during transmitting,
the status indicator flashes red. When the speaker sounds warning
tone, the radio will stop transmitting.
4.1.7 Monitor
When no signals are being received, the radio squelch circuit
mutes the speaker.
Press the MONI key to cut off the squelch control circuit, and
you will hear noise from speaker (no mater whether there are
signals). Such operation is very useful when you want to adjust
voice volume or receive weak signals (to avoid voice intermittence
when in weak signals).
When you press the MONI key, the green indicator lights, and
the radio is in the state of monitoring.
4.1.8 Busy Channel Lockout
If busy channel lockout has been activated, transmitting
signals is prohibited on the busy channel. If you press the PTT to
transmit on the busy channel, the speaker will sound busy channel
lockout tone, and you cannot transmit signals.
4.1.9 PC Programmable
You can program the radio functions and adjust some
parameters by PC programming software KSP20.
4.1.10 Wired Clone
The radio can transfer the stored data to another radio of the
same mode by a specified cable.
4.1.11 Squelch Level Selection
The purpose of the squelch is to mute the speaker noise when
no signals are received or the signals are weak. When the squelch
is activated, you can hear noise from the speaker; when the
squelch is inactivated, you will not hear noise form the speaker.
Selecting the squelch level is to select which the signal strength
level is strong enough to enable the squelch or weak enough to
disable the squelch. Over high squelch level will make the radio
unable to receive signals efficiently when signals are weak; over low
squelch level will make the radio communication affected by noise
or other irrelevant signals. The squelch level has 0-9 options.
4.1.12 Beep Tone
This option controls power on tone, channel busy tone and TOT
tone.
4.2 Parameter Setting (PC Mode)
The radio parameters have been programmed in the factory.
The user can program the radio parameters such as working
frequency, channels, CTCSS/DCS, auto scanning. We designed a
user friendly and convenient Chinese/English programming
software KSP20 for users to set parameters on the radio. The
programming steps are as follows:
a.Install the programming software KSP 20 on the computer.
b.Connect the radio to the computer serial port with the
specified programming line (KSPL02). See Figure 4.1
a.Turn on the computer power.
b.Turn on the radio power.
c.Click the KSP20 program to run the programming software.
d.Click the Tools in the KSP20 pull-down menu, and click
Read Data to read the radio parameters into the computer;
click Write Data to transfer the PC programming parameters
into the radio.
e.You can program the following parameters with the KSP20
software.
1) The RX and TX frequency of each channel.
2) The receiving and transmitting signaling of each channel.
3) Busy channel lockout option.
4) TOT
5) Squelch level option.
6) Power saving option.
7) Beep tone option.
8) Monitor mode option.
9) Scan mode option.
10) Scan the revert channel option.
11) Scan the priority channel option.
For more details, please refer to the Help in the KSP20
software.
Notice:
1) Turn off the radio before connection.
2) When the radio is being read data, the indicator lights green
and it's prohibited to press the PTT button; when the radio is being
written data, the indicator lights red.
3) Before the first time editing, you should read data form the
radio and backup the data.
4) If the radio cannot work normally after being written in with
the editing data, open the data backup and rewrite the backup into
the radio.
5) Model information is important radio data and is prohibited to
modify.
6) After programming, you need to turn on the radio power
again to make the radio resume the normal work.
4.3 Computer Test Mode:
Connect the radio to the radio communication port with the
specified programming line (KSPL02). See Figure 4.1.
Warning: Before enter the computer test mode, connect a HF
load of 50 to the radio antenna connector or connect the radio to a
comprehensive test device.
Under the computer test mode, you can modify the following
parameters with KSP20 programming software:
1) Frequency tuning;
2) Transmitting power;
3) Low voltage threshold;
4) The 9th squelch level;
5) The 3rd squelch level;
6) Sub-audio wide band modulation degreed;
7) Sub-audio narrow band modulation degreed;
8) Wide band sub-audio center.
4.4 Wired Clone (It can be prohibited by programming
software)
When the wired clone function is activated, the radio can enter
the wired clone mode. After entering the wired clone mode, the
Programming
Line (KSPL02)
PC
(RS232 Serial
Port)
Radio
(Speaker/ Mic
Socket)
8
PT558 SERVICE MANUAL