Full technical specifications for the SF1 active directional antenna, including its radiation pattern and reference data for setting gain against different coaxial cable runs. For installation, gain setup, and placement, see [SF1] User Guide - Setup & Use.
SF1 Specifications and Parameters
| RF Frequency Range | 470MHz to 960MHz |
| Input Impedance | 50Ω |
| Active Gain | -9dB to +21dB (step 1dB) |
| Passive Gain | Typ. 6dBi |
| OIP3 | 39dBm |
| Pickup Pattern | Directional |
| Pickup Angle | 60° (optimal usage angle range) |
| Polarization | Linear |
| RF Input Power | 30mW (max) |
| Power Requirements | DC 12 to 16.8 V |
| Power Consumption | 12V / 90mA (max) |
| Waterproof Rating | IP54 |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -20°C to +70°C |
| Operating Humidity | 5% to 95% |
| Dimensions (L x W) | 376.5 x 328.8mm |
| Weight | 532g |
| Connector | BNC |
| Install | 3/8" to 5/8" threaded mounts |
Polarity Diagram
The SF1 has a directional pickup pattern with an optimal usage angle range of roughly 120°.
The data above was measured in the lab and is subject to real physical data. Illustrations are for reference only; if the product differs from this manual, refer to the product itself.
Appendix: Typical Attenuation of Coaxial Cables
Use these tables to estimate cable signal loss and choose a starting gain setting on the active amplifier. Signal loss rises with both frequency and cable length, so match the gain to your cable type and run length.
Typical Attenuation of Coaxial Cables (30 meters / 100 feet)
| Cable Type | Diameter mm (in) | Attenuation @400MHz | Attenuation @900MHz |
|---|---|---|---|
| RG 58 C/U | 4.95 (1.9) | 9.6dB | 10.4dB |
| RG 213 /U | 10.3 (4) | 3.9dB | 6.6dB |
| RG 218 /U | 22.1 (8.6) | 2.1dB | 4.2dB |
| cellflex-1/4" foam | 8.8 (3.4) | 2.5dB | 3.9dB |
Attenuation of DEITY BNC Coaxial Cable (5 meters)
| Frequency | 470MHz | 500MHz | 600MHz | 700MHz | 800MHz | 960MHz |
|---|---|---|---|---|---|---|
| Attenuation | 2.1dB | 2.2dB | 2.5dB | 2.7dB | 3.0dB | 3.3dB |
| Gain Setting Recommendations | 2 | 2 | 3 | 3 | 3 | 3 |
Note: Adjust the gain settings appropriately according to the on-site environment and other influencing factors.