5-1-1
Analog to Digital Migration Path
Group A
Analog
Group B
Analog
Group C
Analog
Migration
Migration
Migration
Migration path
path
path
path
1. Introduce a digital system into a current network step by step
2. Operate in analog and digital modes in the different frequencies
3. Within the digital group communicate in digital mode
4. Communicate between a digital group and the analog group in analog mode
Phase 1: Introduce a digital system into
Phase 1: Introduce a digital system into
Phase 1: Introduce a digital system into
Phase 1: Introduce a digital system into Group
Group
Group
Group C
CC
C
•
Partially introduce a digital system into an existing
analog network
•
Replace the transceivers from analog to digital in
Group C
•
Add a digital repeater
Analog
Tx = f
2
Rx = f
1
Analog
Tx = f
2
Rx = f
1
Digital
Tx = f
3
Rx = f
Digital
Tx = f
4
Rx = f
3
Analog Repeater
Analog Repeater
Digital Repeater
Analog
Tx = f
1
Rx = f
2
Analog
Tx = f
1
Rx = f
2
Analog
Tx = f
1
Rx = f
2
Analog
Original Network
Original Network
Original Network
Original Network –
––
– Analog only operation
Analog only operation
Analog only operation
Analog only operation
39
Group A
Analog
Group B
Analog
Group C
Digital
•
Add a digital repeater
•
Allocate new frequencies to the digital network
•
Set the Talk Back ON in the scan list setting for the
transceivers in Group C to transmit an analog signal
when received from Groups A and B
Rx = f
4
Analog
Tx = f
1
Rx = f
2
Phase 2: Introduce a digital system into
Phase 2: Introduce a digital system into
Phase 2: Introduce a digital system into
Phase 2: Introduce a digital system into Group
Group
Group
Group B
B
B
B
•
Expand the digital system into a mixed operating
network
•
Replace the transceivers from analog to digital in
Group B
•
Set the Talk Back ON in the scan list setting for the
transceivers in Group B to transmit an analog signal
when received from Group A
Group A
Analog
Group B
Digital
Group C
Digital
Analog
Tx = f
2
Rx = f
1
Digital
Tx = f
3
Rx = f
4
Digital
Tx = f
4
Rx = f
3
Analog Repeater
Digital Repeater
Analog
Tx = f
1
Rx = f
2
Digital
Tx = f
3
Rx = f
4
Analog
Tx = f
1
Rx = f
2
Analog
Tx = f
1
Rx = f
2
Analog
Tx = f
1
Rx = f
2
Analog
Tx = f
1
Rx = f
2
Phase
Phase
Phase
Phase 3
33
3 Introduce a digital system into the
Introduce a digital system into the
Introduce a digital system into the
Introduce a digital system into the Group
Group
Group
Group AAAA
•
Convert to a full digital network from a mixed
operating network
•
Replace the transceivers from analog to digital in
Group A
•
Cancel Analog operation
Group A
Digital
Group B
Digital
Group C
Digital
Digital
Tx = f
3
Rx = f
4
Digital
Tx = f
4
Rx = f
3
Digital Repeater
Digital
Tx = f
3
Rx = f
4
Digital
Tx = f
3
Rx = f
4