TTI TCB-550 - Circuit Description; General Receiver and Transmitter Specs

1. General
1-1. Receiver
Display : 40 Channels and other functions indication
Frequency Range : 26.965 to 27.405 [MHz]
Frequency Response : 300 to 2,500 [Hz]
Power Source : 13.2 [V] DC
Audio Output Load : 8 [OHM] Resistive
Audio Output : 4.0 [W] (or More)
Squelch : Adjustable from 0.2[uV] to 1 [mV]
Sensitivity :
- FM : 20 dB [SINAD] under 1.0 [uV] or less
- AM :10 dB [S/N] under 1.0 [uV] or less
Intermediate Frequency :
- 1st IF : 10.695 [MHz]
- 2nd IF : 455 [KHz]
1-2. Transmitter
Carrier Power(Conducted) : AM 1 [W] / FM 4.0 [W]
Current Drain ( 13.2 [V] Supply Voltage)
- No Modulation : 1,100 [mA] (No Modulation)
- Max Modulation : 1,400 [mA] (Full Modulation)
Modulation Capabilities
- AM : +/- 90 [%]
- FM : +/- 1.8 [KHz/Dev]
Spurious Radiation : Less then -74 [dBc]
Antenna Impedance : 50 [OHM]
Frequency Tolerance : 0.002 [%]