Telonics TR-8 Handheld Scanning Receiver ²⁵

Key Features

• Wideband coverage (138 – 235 MHz) with narrowband sensitivity
• Stores over 2000 scannable frequencies, custom labeled and organized in up to 25 independent lists
• Full 177dB gain control lets you completely turn down the gain for high signal levels - ideal for recovering transmitters
• Automatic signal detection includes a signal-strength meter, digital pulse-strength indication, and pulse-rate measurement
• Internal Li-Ion battery provides 15-hour operational life (typ)
• Easily programmable, with or without a PC

Comparing TR-8 with Others

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• • Characteristics
    General	Synthesized direct-conversion receiver
    Frequency Coverage	138 to 235 MHz continuous coverage
    Frequency Selection	Direct entry via keypad or rotary knob
    Frequency Resolution	100Hz
    Center Frequency Accuracy	±1ppm at 20°C
    Frequency Stability	±2ppm from -20 to +70°C (referenced to frequency at 20°C)
    Long Term Frequency Drift	(after one-minute stabilization) ±100Hz
    Audio bandwidth (-3dB)	Three user-selectable ranges: [500-1300Hz] [350-1800Hz] [800-1600Hz]
    Acceptable Modes of Operation	pulse amplitude modulation (PAM), pulse period modulation (PPM), continuous wave (CW), and single side band (SSB)
    Pulse Detection and Notification	Minimum pulse width: 10 milliseconds Minimum pulse rate: 12 beats per minute
    Low Battery Indication	Battery Gauge on Display
    Power Supply	Internal: 4.2V/3300mAh rechargeable Li-Ion cell External (battery charger input): 5V via USB-C port
    Typical Operating Lifetime (@ 20°C)	15 hours with automatic LCD backlight usage 12 hours with LCD backlight 'locked on' (medium level)
    RF Input Impedance	50 ohms
    Noise Figure	4 dB typ with 50Ω Source Impedance
    Sensitivity for 10 dB S+N+D/N	Better than -130 dBm typical (500-1300 Hz audio bandwidth setting)
    Typical Minimum Discernible Input Level	-150 dBm (0.007 microvolt)
    Opposite Sideband Suppression	40 dB typ
    Audio Gain Control Range	18 dB typ
    RF gain control range	177 dB typ
    Total Gain Control range	195 dB typ
    Audio Output Impedance	16Ω (headphone jack)
    Internal Speaker Cut Out	Internal speaker is muted when plug is inserted in headphone jack
    Audio Output Jack	1/8 inch (3.5mm) stereo or monaural phone plug
    Programming / Charging Connector	USB-C port
    RF Input Connector	BNC jack
    Display	3 x 5 cm 128 x 64 pixel LCD display with auto-dimming backlight
    Keypad	Backlit silicone keypad with 3 multi-function 'soft' keys
    Gain Control	Rotary encoder with pushbutton controls both RF gain and audio volume
    Tune Control	Rotary encoder with pushbutton adjusts frequency in 100 Hz steps and scrolls quickly through frequencies stored in scan memory
    Multipurpose LED	Front panel LED has multiple functions: With TR-8 off Red: battery charging Blue: battery fully charged With TR-8 on Red (pulsed): over-gain warning indicator Blue (pulsed): RF pulse detected
    Scan Memory	2,475 frequencies (organized in 25 lists with up to 99 frequencies each)
    Programming	Frequency lists and labels may be modified: 1. Via PC application connected via USB 2. Directly on the TR-8 with user-friendly interface
    Operating Temperature Range	-20 a +70 °C
    Dimensions	15.9 x 6.3 x 3.0 cm (6.3 x 2.5 x 1.2 in) [excluding knobs and connectors]
    Weight	285 g

• • Receiver
  • Manual
• • None
• • VHF Antenna
• • User Manual (English)
  • Getting Started Guide (English)

EO 20230629