User Manual

Fibre Optic Master and Remote Site
User Handbook
Document Number: 60-212701HBK - Issue No. 1 Page 36 of 50
4.2.4.15. Fibre Optic Transmitter (2.7GHz) (20-005401)
The transmitter modulates the RF signal on to a laser, which is then transmitted over a fibre optic
cable to a receiver. The laser current is monitored and compensated for constant optical out put
power against temperature variation and aging. Laser over-current alarm function is provided as LED
output as well as open collect and voltage-free relay contacts on 9 way D-type connector.
20-005401 specification
PARAMETER SPECIFICATION
Frequency Range (RF path) 70 - 3000 MHz
Frequency Range (Data path) 20 – 35 MHz
Available Link Gain (RF Path) 18 dB
Link Gain ( DATA Path) 0 dB
Gain Flatness (entire frequency range) ±1.5 dB p-p
'Gain vs. Temperature -20 to 70 ºC
3.5 dB
Gain adjustment range ( RF Path ) 30 dB
In/Out Return Loss (RF path) 10 dB Min
Output IP3 @ max gain * 37 dBm
In/Output IP3 @ 0dB Gain * 33 dBm
RF impedance 50 Ohm
Noise Figure @ 0dB gain (400MHz) 36 dB
Optical Transmit Power 2.7±0.3 dBm
Optical return loss >50 dB
Received Power Alarm Threshold -10 dBm(optic)
Optical wavelength 1310 nm
DC Supply Voltage 10-12 Vdc
DC Supply Current 120 mA
Operating Temperature -20 to 70 ºC
Storage Temperature -30 to 85 ºC
RF Connector type SMA
Fibre optic connector type FC/APC
Fibre Optic Transmitter (20-005401) ‘D’ Type Female Connector Pinouts
Pin No. Signal Description
1 +10-12V DC Power
2 0V DC, Power Ground
3 0V DC, Power Ground
4 No Connection
5 No Connection
6 TTL Alarm, (0V=good, open coll.= fail)
7 Relay Alarm Contact (N.C)
8 Relay Alarm Contact (Common)
9 Relay Alarm Contact (N.O)