TR-8 Handheld Scanning Receiver
- 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
- Available Now!
TR-8 Editor Software
- View and edit lists on the TR-8
- Keep TR-8 firmware up-to-date
- Frequencies can be typed in,
imported from a TPF file,
copied from Microsoft Excel,
or added by range - Runs on any Windows 7 or newer PC
- Download v1.35, 2024.09.24
(setup-TR8v1.35.exe 543 kB)
Specifications
TR-8 Handheld Scanning Receiver Specifications - Show
| 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 With TR-8 onBlue: battery fully charged 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 to +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 | 285g typ |