TRX-1 Specifications & Frequency Coverage

Summary: The TRX-1’s receiving modes, sensitivity, power, size and the frequency ranges and step sizes it covers.

Specifications

• Receiving modes: AM, FM, FM-MOT (Motorola), LTR, CTCSS, DCS, NAC on P25, EDACS wide/narrow, P25 Phase I, X2-TDMA, P25 Phase II, DMR, MotoTRBO Tier II and NXDN
• Receiver: triple-conversion PLL superheterodyne. IFs: 380.8 MHz, 21.4 MHz and 455 kHz
• Weather channels: 162.400, 162.425, 162.450, 162.475, 162.500, 162.525 and 162.550 MHz
• Display: full dot-matrix bitmap LCD, 132 x 65 dots
• Sensitivity (12 dB SINAD): VHF low 0.2 microvolts; VHF aircraft (AM) 0.4; VHF high 137-174 MHz 0.3; 216-300 MHz 0.4; UHF low 300-406 MHz 0.8; UHF 406-512 MHz 0.4; 764-960 MHz 0.5; 1240-1300 MHz 0.5
• Squelch threshold: AM/FM 0.5 microvolts. Signal to noise: 35-40 dB typical
• Scan rate: about 70 channels per second (138-147.9 MHz in 100 kHz intervals). Search rate: about 80 steps per second. Scan and search delay: 2 seconds
• Audio output: 500 mW into 8 ohm; built-in 36 mm 8-ohm speaker
• Current drain: 170 mA squelched (5V external power, backlight off, not charging)
• Antenna impedance: 50 ohm
• Operating voltage: 4.8V (four Ni-MH AA) or 6V (four alkaline AA). External power and charge: USB 5V, 500 mA
• Temperature range (optimal): -10 to 60 C
• Size and weight: 135 x 67 x 28 mm (5.31 x 2.12 x 1.06 in); 210 g (7.4 oz) without antenna and batteries

Frequency Coverage

The guide lists these ranges and steps (the last two lines are Canadian-bandplan ranges):

• 25.000-26.960 MHz 10 kHz AM; 26.965-27.405 10 kHz AM; 27.410-29.505 5 kHz AM; 29.510-29.700 5 kHz FM; 29.710-49.830 10 kHz FM; 49.835-54.000 5 kHz FM
• 108.000-136.9916 MHz 8.33 kHz AM
• 137.000-137.995 5 kHz FM; 138.000-143.9875 12.5 kHz AM; 144.000-147.995 5 kHz FM; 148.000-150.7875 12.5 kHz FM; 150.800-150.845 5 kHz FM
• 150.8525-154.4975 7.5 kHz FM; 154.515-154.640 5 kHz FM; 154.650-156.0450 7.5 kHz FM; 156.0500 FM; 156.0525-156.1725 7.5 kHz FM; 156.1750 FM; 156.1800-156.2475 7.5 kHz FM; 156.2500-156.2550 5 kHz FM
• 156.275-157.450 25 kHz FM; 157.470-160.8225 7.5 kHz FM; 160.8250 FM; 160.830-161.5725 7.5 kHz FM; 161.600-161.975 5 kHz FM
• 162.000-174.000 12.5 kHz FM
• 216.0025-219.9975 5 kHz FM; 220.000-224.995 5 kHz FM
• 225.000-379.99375 6.25 kHz AM
• 380.000-419.9875 12.5 kHz FM; 420.000-450.000 2.5 kHz FM; 450.003125-470.000 3.125 kHz FM; 470.00625-512.000 6.25 kHz FM
• 764.000-781.996875 3.125 kHz FM; 791.000-796.996875 3.125 kHz FM; 806.000-823.9875 12.5 kHz FM
• 849.000-868.9875 12.5 kHz FM; 894.000-939.9875 12.5 kHz FM; 940.000-960.000 6.25 kHz FM
• 1240.000-1300.000 MHz 6.25 kHz FM
• Canada: 137.000-174.000 5 kHz FM; 380.000-512.000 12 kHz FM (as printed)

The guide excludes the frequencies used by the US cellular service (824-848.9875 and 869-893.9875 MHz). Nothing is listed between 54 and 108 MHz, 174 and 216 MHz, 512 and 764 MHz, or 960 and 1240 MHz.

Notes for UK Users

• Airband (108-137 MHz) is covered with 8.33 kHz steps in AM, and the 225-380 MHz military air band is covered in AM.
• The UK 174-216 MHz band (for example DAB) is not covered, and TETRA, which is in the 380-400 MHz range, isn’t a mode the scanner decodes.
• The steps printed for 420-450 MHz (2.5 kHz) don’t line up with the 6.25 kHz raster used by some UK channels such as PMR446 (446.00625 MHz upwards). Enter one and check what the display shows before you rely on it.
• The bandplan choice is USA or Canada only.