Antenna Guide
ISM 900 MHz band — stock antenna is close but not optimal
Stock Telescopic Antenna
- 912 MHz: Extend to ~8.2 cm (quarter-wave). The stock antenna is close enough to work
- Range: Most meters transmit at ~100 mW, expect 50–200 m range with stock antenna
Upgraded Options
- Ground Plane: 8.2 cm vertical + four 8.2 cm radials at 45° on SMA connector
- Yagi: Directional for targeting specific meters at distance (~$15–25)
- Placement: Near a window facing the meters. Line-of-sight matters most
Quick Reference
| Frequency (NA) |
912 MHz |
| Frequency (EU) |
868 MHz |
| 912 MHz λ/4 |
8.2 cm |
| Meter TX power |
~100 mW |
| Polarization |
Vertical |