» Products /Railways / FM Tokenless Transmitter & Receiver
Transmitter and Receiver units are designed to work at 24V DC voltage (nominal) with variation between 19.2 V to 28.8V. The system is designed to work with carrier frequency 1800/2700 Hz and modulated frequency 65Hz/85Hz. For 1800Hz Carrier Frequency RED border is used in Front Panel and for 2700Hz Carrier Frequency BLUE border is used in Front Panel. Maximum power consumed by transmitter and receiver are 1.2W and 8W, respectively. Sense level for receiver is less than –19 dBm and No sense level for receiver is more than –22 dBm with 1mw (0 dBm) transmitter power. The equipment is designed to work satisfactorily with temperature variation from 0°C to 55°C with relative humidity of 95% at 35°C. Suitable test points are provided in the back of the equipment to monitor the necessary parameters.
Product Model
Type
Transmitter Frequency
Receiver Frequency
1800 Type
1800 Hz
2700 Type
2700 Hz
Transmitter Specifications
Item
Rating
Remarks
Transmission frequency
1800 Hz or 2700 Hz
±2%
Transmission output
1mW, 3mW, 5mW adjustable
±10 %, -5 %
Output Impedance
600 Ohm, 1120 Ohm adjustable
±10 %
Modulation System
Frequency Modulation
Modulation Frequency
65 Hz or 85Hz
±1.5Hz
Power Consumption
1.2Watt or less
At 24V DC
Input Power Supply
24V DC
±20 %
Shift Frequency
160Hz
±15 %
Receiver Specification
Receiving frequency
Level Range
1 to 28 dB
In steps of 2dB or less
Input Impedance
Relay output voltage
24V DC or above
21V Min.
8 Watt or less
Sense level for Receiving
More than -19 dBm
No sense level for receiving
Less than -22 dBm
Application
Environmental Conditions