# Specification
### Specification
|
| P900 | P840 | P400-C1S |
| ------------------------------------ | ------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------- |
| Frequency Range | 902 to 928 MHz | 840 to 845 MHz | 410 to 480 MHz |
| Transmit Power (Software Adjustable) | 100mW to 1W (20-30dBm)
| 100mW to 1W (20-30dBm) | 100mW to 1W (20-30dBm) |
| Link Rate | Up to 276 kbps | Up to 345 kbps | Up to 345 kbps |
| Serial Baud Rate | Up to 230.4kbps asynchronous | 300 bps to 230 kbps | 300 bps to 230 kbps |
| Spreading Method | Frequency Hopping Spread Spectrum (FHSS) | Frequency Hopping/Fixed Frequency,
GMSK, 2GFSK, 4GFSK, QPSK
| Frequency Hopping,
GMSK, 2GFSK, 4GFSK, QPSK
|
| Operating Modes | Mesh, Point-to-Point, Point-to-Multipoint, Store and Forward,
Auto Routing, Self Healing, Packet Routing Modes
| Point-to-Point, Point-to-Multipoint,
store & Forward Repeater, Peer-to-Peer
| Point-to-Point, Point-to-Multipoint,
store & Forward Repeater, Peer-to-Peer
|
| Input Voltage | DC7\~35V
(4-position JST-GH)
| C7\~35V
(4-position JST-GH)
| C7\~35V
(4-position JST-GH)
|
| Power Consumption | Sleep < 1mA
dle 3.5mA
Rx: 45mA to 98mA
Tx : 1000mA to 1400mA
| Sleep < 1mA
dle 3.5mA
Rx: 45mA to 98mA
Tx : 1000mA to 1400mA
| Sleep < 1mA
Idle 20mA
Rx: 45mA to 98mA
Tx Peak: 2A
|
| Error Detection | 32 bits of CRC, ARQ | 32 bits of CRC, ARQ | 32 bits of CRC, ARQ |
| Antenna Gain | 5dBi | 5dBi | 5dBi |
| Weight | 44g (without antenna)
71g (with antenna)
| 44g (without antenna)
71g (with antenna)
| 44g (without antenna)
67g (with antenna)
|
| Weight (V2) | 51g (without antenna)
81g (with antenna)
| NA | 51g (without antenna)
76g (with antenna)
|
### P400 Frequency 410 to 480 MHz (Frequency Hopping)
| Rate (kbps) | Power (W) | Sensitivity (dBm) | Bandwidth (kHz) | Regulatory |
| ----------- | --------- | ----------------- | --------------- | ---------- |
| 56.0 | 1 | -113 | 60.0 | None\* |
| 115.2 | 1 | -109 | 150.0 | None\* |
| 172.8 | 1 | -108 | 180.0 | None\* |
| 230.4 | 1 | -106 | 230.0 | None\* |
| 276.4 | 1 | -105 | 230.0 | None\* |
| 345.0 | 1 | -103 | 400.0 | None\* |
### P840 Sensitivity (Frequency Hopping)
| | | |
|---|
| Rate (kbps) | Power (W) | Sensitivity (dBm) | Bandwidth (kHz) |
| 19.2 | 1 | -116 | 25 |
| 56 | 1 | -113 | 60 |
| 115.2 | 1 | -109 | 150 |
| 172.8 | 1 | -108 | 180 |
| 230.4 | 1 | -106 | 230 |
| 276.4 | 1 | -105 | 280 |
| 345 | 1 | -103 | 400 |
### P900 Sensitivity (@10-4)
| Rate (kbps) | Sensitivity (dBm) |
| ----------- | ----------------- |
| 57.6 | -114 |
| 115.2 | -112 |
| 172.8 | -109 |
| 230.4 | -107 |