Golden Gate Bridge District P25

[trooperdude]

Golden Gate Bridge to get P25, wireless communication systems

Golden Gate Bridge to get P25, wireless communication systems

Feb 12, 2009 12:56 PM, By Mary Rose Roberts

The Golden Gate Bridge Highway and Transportation District awarded GE Transportation, a unit of the General Electric Co., a $15.5 million contract for an advanced communications and information system (ACIS). The system will be used to integrate transportation and security data used by the bridge and collaborating law-enforcement agencies, said Mary Currie, the Golden Gate Bridge’s spokesperson.


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[trooperdude]

Looks like EADS is FDMA full-duplex.

EADS Secure Networks North America

General Specifications
Frequency range VHF: 136-174 MHz
UHF: 380-520 MHz
764- 870 MHz
Access method Frequency Division Multiple Access (FDMA)
Radio protocol standard APCO Project 25
Transmission mode Full duplex using two sub bands separated
by 3 to 10 MHz duplex spacing depending
on frequency range
Channel spacing 12.5 kHz
RF modulation C4FM, Optimized for digital transmission and
narrow channel bandwidth(spectral efficiency)
Channel gross bit rate 9.6 kbit/s
Power supply 110/230 V AC 50/60 Hz 48 VDC
Operating temperature range (guaranteed) -22 to +140 F (-30 to +60 C) ambient temperature
Humidity < 95% for temperature < 60°C
Cabinet size (mm) (WxDxH) 482.6(19in) x 410(16.1in) x 176.8 (7in)
Weight 21.5 kg Single Channel 100W system configuration
Maximum Power consumption 1.1 A / 240 VAC or 2.2 A /110 VAC
Electromagnetic compatibility specifications (EMI/EMC) FCC CFR47 Parts 22,90 Part 15 class B, RSS 119 ISS 6 (Canada, VHF & UHF only)
PSTN Line Isolation FCC CFR27 Part 68 Industry Canada CS-03
Duty cycle Continuous (100%)


Transmitter Specifications
Type Approval VHF: FCC certification CASTBAB1
Industry Canada: 737A-TBAB1
UHF: FCC certification CASTABA-H0
Industry Canada: 737A-TBAH0
800 MHz: FCC certification
CASTBA9K2 (100W), CASTBA8K2 (50W), CASTBA7K2 (5W)
Emission Designator 8K10F1E Narrow band digital
RF power amplifier output Up to 100 Watts PA RF output power locally or remotely
adjustable, from 5 Watts to 100 Watts
RF nominal load impedance 50 ohms
Frequency stability Better than 0.5 ppm.
Adjacent channel power < -60 dB IS-102

 

[rooivalk]

Soooo....how will this be incorporated into the planned SF/Bay Area multi county system?

Seems like it may be a big waste of $ if they have to change it all for the new (planned-whatever then name of it was) system.

 

[dougr1252]

ISSI is your friend

P25 ISSI