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Digital - analogue / analogue - analogue Cross
mode connection
•analogue TX signal can be RX by analogue/Digital
radios
•Digital TX signal can be RX by analogue/Digital
radios
•Repeater/Digital radio operate in Mixed-Digital mode
•analogue radio operates in analogue mode
•analogue repeater for analogue TX only
TX Antenna 1
Tx =
f
2
CTCS
S
Tx = f
1
Rx = f
2
CTCSS
analogue H/H
analogue modulated signal from analogue area
Digital modulated signal from digital area
analogue modulated signal from digital area
Frequency
f
: Up link (both Digital & analogue)
1
f
: analogue Down link
2
f
: Digital or analogue Down link
3
This is an example of Digital and analogue cross
mode operation. The IDAS radio (including repeater)
can receive both analogue mode and digital mode
signals on a single channel. This function is useful
when introducing digital system components into an
existing analogue system. It allows the system
operator to communicate with analogue only
terminals while utilizing the digital features as
required.
System requirement (One site)
Descriptions
Model Number
UHF Repeater
IC-FR6100
UHF RF Module
UR-FR6100
TX Antenna
RX Antenna
Multi Coupler
Interface Cable
25p to 25p
5-2
Digital-analogue Cross System
IC-FR6100 + UR-FR6100
Quantity
RX Antenna
Rx = f
1
Linking
interface
Connection example
Connect two repeaters by interface cable (25p to 25p).
These interface cables are not sold as Icom accessories,
therefore please assemble the interface cable by
yourself. The connection diagram is as follows;
analogue Repeater (25pin)
Pin Description
Pin No.
MODIN
8
EPTT
19
EPTT
19
GND
7,14
EPTT
P19
Resistor 47kΩ
Switching Diode e.g.
MA2C167
P7,1
GND
4
TX Antenna 2
Tx = f
3
(25pin)
Tx = f
1
Rx = f
3
Digital H/H
Digital Repeater (25pin)
Pin No.
Pin Description
22
AFOUT
21
Digital Audible
23
analogue Audible
7,14
GND
Digital Audible
P21
analogue
P23
Audible
P7,1
GND
4
38
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