BASE STATION REPEATERS
SB2025NT-T/N P25 SIMULCAST/VOTING BASE STATION REPEATER
SB2025NT OVERVIEW
Building on the plug and play principles of analogue Dalman simulcast systems, SB2025NT-T/N integrated simulcast and voting controller offers enhanced resilience and full remote management of base station networks, while interfacing in a cost effective, compact component based P25 system.
- Simulcast technology synchronises duplicated channels in a wide area network to avoid interference between adjacent radio sites.
- Digital VoIP signals are better defined and more consistent than their analogue counterparts, enabling the synchronisation task to be ‘processor controlled’.
- SB2025NT-T/N incorporates an RSSI voter which can operate in talk through mode with simulcast transmit.
- Easy to deploy base station, with intuitive set up and simple remote management.
TECHNICAL SPECIFICATIONS
Frequency Bands:
148-174 MHz, 400-435 MHz, 435-470 MHz, 763-775 MHz (TX), 793-805 MHz (RX+), 850-870 MHz (TX), 805-825MHz (RX)
Channels:
255 DFSI selectable
Channel Spacing:
Analogue – Programmable 25/12.5 kHz / Digital – 12.5kHz
Antenna Connections:
Rx,Tx both N type female
Modulation:
Analogue – Direct FM two point method / Digital – C4FM
Operating Temperature:
– 30 to +60˚C (-22˚ to 140˚F)
Physical Size:
2RU Height x 19” rack mount
Supply Voltage:
13.8 +/- 20% or optional AC mains input
Models
SB2025NT-T – Traffic Manager + Network Interface
SB2025NT-N – Network Interface only
1.5PPM
Modulation Fidelity:
Less than 3%
Power Output:
100W
Symbol Deviation:
1.8kHz
300Hz to 3000Hz (+1,-3dB)
Distortion:
Less than 2% @ 60% deviation
Intermodulation Immunity:
Better than 82dB blocking better than 100dB at +/- 1MHz point
Sensitivity:
Better than – 117 dBm for 12 dB SINAD, typ -120 dBm. P25 – Better than – 117 dBm for 5% BER
- Front panel status indicators
- DFSI interface option for IP connected dispatch console
- Mixed mode repeat – analogue and digital
- NAC can be unchanged or defined
- Remote diagnostics
- Transparent P25 repeat – passes encrypted voice transparently
- 4-wire analogue dispatch console interface (via central NI)
- SNMP traps
