User's Manual
DMR repeater 18/02/2011 Versione 1.3
Documento Riservato - non divulgabile senza autorizzazione
Pag. 22 / 32
3. A female BNC-type connector (below the N-type one) is present if the base station is
equipped with the diversity receiver. This connector is directly connected to the input of
the diversity receiver, without any cavity filter/isolation inside the equipment. Care
should be taken in designing external branching and radiant system;
4. A female SMA-type connector for embedded GPS receiver. The equipment supplies
5Vdc through this connector for the remote active antenna (which is requested with a
minimum gain of 20dB and possibly equipped with a rejecting filter for out-of-band
spectral components);
5. A female SMA-type connector for GSM/GPRS embedded transceiver. A passive antenna
is required. (The SIM holder is mounted inside I/O module.).
GPS
antenna
GSM /
GPRS
antenna
Duplex antenna /
TX antenna
Diversity RX
antenna
Main RX
antenna
∞ COM port: 9 poles D-SUB type socket, connected to an optional RS232 serial port (115.2Kbit/sec,
8,N,1) for remote controlling the equipment by a PC. This is a secondary access port to the base
station, auxiliary/alternative respect to the main ethernet port. The RS232 driver is mounted on the
I/O module.
5
9
4
8
3
7
2
6
1
J4
SJV9
rts_232
CTS
cts_232
TX-PC
RX-PC
TX_232
RX_232
RTS
∞ “Fan” and “Auxiliary power supply output”: the first is an active low, open collector type contact, not
isolated, which can activate an optional external cooling system if RF power amplifier temperature
would rise over 90°C. In normal ambient and working conditions, no cooling system is required. The
second connector supplies 12Vdc 200mA and 6Vdc 200mA (not isolated) for eventual auxiliary devices
.
1
2
P2
MCV 0,5/ 2-G-2,5
HI-TEMP
6V_SERV
12V_SERV
1
3
2
4
P1
MCV 0,5/ 4-G-2,5