LoRa · RF ANALYSER

APRS & MESHTASTIC · US BANDS · GO/NO-GO CHECKER

LIVE CALC
LoRa PHY Parameters
APRS
SF12
125k
4/5
Firmware-Fixed PHY (CA2RXU Tracker defaults)
Preamble8 symbols (RadioLib default)
CRCEnabled — always on
Header ModeExplicit — always on
LDROAuto — ON at SF12 + BW125k
Packet Type

Mic-E: shortest valid APRS position format — firmware default encoding

Network / Traffic Parameters
915

US APRS standard: 144.390 MHz · Meshtastic US standard: 915 MHz

10
60s

APRS mobile: 1–5 min · fixed/WX: 10–30 min · Meshtastic: 15 s – 60 min

1

APRS: WIDE1-1,WIDE2-1 = 2 hops standard · each hop re-TXs on channel

Calculated RF Metrics
Channel Load Analysis
Per-device TX fraction
0.0000%

US/amateur bands: no regulatory duty cycle limit. Shown for channel health.

Total channel occupancy (all nodes + hops)
0.000%

<5% healthy · 5–15% busy · >15% congested · >30% critical

Time-on-Air Breakdown
ComponentValue

Semtech AN1200.13 · T_sym = 2^SF / BW · T_pre = (N + 4.25) × T_sym

Channel Activity Visualiser ● LIVE
BEACON INTERVAL SCALE — one interval shown (ToA vs gap)
0
NODE WATERFALL — 60 s window · each row = one node (max 20 shown) · scrolls in real time

▬ Primary TX  ·  ▬ Digi / hop re-TX  ·  ▬ Collision (simultaneous signals from different nodes)

Go / No-Go Analysis
GO