AnySecu SF-103: Handheld 2 MHz–2.8 GHz Frequency Counter with DMR Digital Decoding and CTCSS/DCS Reader
Engineered for licensed amateur radio operators, commercial PMR system technicians, field repeater stewards, and RF monitoring enthusiasts. The AnySecu SF-103 provides instant, off-the-air verification of operating frequencies, signal strength, and sub-audible signaling tones across handheld and mobile two-way radios without physical feedline taps.
Key Features & Operational Benefits
- Continuous 2 MHz to 2.8 GHz measurement range: Covers HF, VHF, UHF, and microwave ISM bands within a single instrument, eliminating the need to carry separate field meters for different radio fleets.
- Integrated DMR TDMA signal processing: Accurately measures carrier frequencies of pulsed digital transmissions, preventing the readout flutter and false locks common to traditional analog counters.
- Automated CTCSS and DCS sub-tone decoder: Instantly detects and displays active analog tones and digital squelch codes, allowing operators to match unknown repeaters or user groups on the fly.
- Real-time RSSI signal strength bargraph: Visualizes field strength variations to speed up transmitter hunting, spurious emission checks, and basic relative RF power checks at close range.
- Internal Li-Ion pack with USB recharging: Delivers multi-hour autonomous runtime for tower climbing and field work, rechargeable via standard 5 V USB sources and power banks.
Technical Specifications
| Model |
AnySecu SF-103 |
| Frequency Range |
2 MHz – 2800 MHz (2.8 GHz) |
| Supported Modulation Modes |
Analog FM, Digital DMR (TDMA) |
| Tone / Code Decoder |
CTCSS, DCS |
| Gate Time |
0.2 s / 0.5 s / 1.0 s (selectable) |
| Timebase Stability (TCXO) |
± 2.5 ppm |
| Input Sensitivity |
< 5 mV (VHF/UHF bands) |
| Input Impedance |
50 Ω |
| RF Input Connector |
BNC female (50 Ω) |
| Display Type |
Color TFT LCD with RSSI bar and battery indicator |
| Power Source |
Internal 3.7 V Li-Ion rechargeable battery |
| Charging Port |
Micro-USB (5 V DC / 1 A) |
| Dimensions (W × H × D) |
70 × 90 × 25 mm (excluding antenna) |
| Weight |
Approx. 145 g |
