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HOME > PRODUCTS > WALKIE TALKIE MODULES > SA858 : 4W UHF BAND HIGH POWER LONG RANGE ALL-IN-O...
SA858 : 4W UHF BAnd High Power Long Range All-in-one Walkie Talkie Module
- SA858 is a professional 4W walkie talkie module. Strong RF circuit, DSP, digital interface, and audio amplifier is built in. Besides Uart command, user can use our provided PC software to configure all the parameters. The parameters includes: Tx frequency, Rx-frequency, Tx CTCSS /CDCSS, Rx CTCSS/CDCSS , digital volume and SQ. To avoid the heating for this high power walkie talkie, we have done special handling on the software with a strong radiator added, which makes it has no problem for long time continuous working.
- When SA858 is connected with SA858-PJ, it is easy to organize a professional all in one walkie talkie system, the system include 16 predefined frequency channels, adjustable volume, configurable CTCSS/CDCSS. User need only to connect with power supply and speaker.
- Simplified interface and ultra small size make SA858 widely used in various applications and conveniently embedded into various handheld devices.
★ Note：In high level, the pins are in 3.3V.
| Parameter | Test condition | Min. | Typ | Max. | Unit |
| Operating voltage range | -- | 3.3 | 8 | 9 | V |
| Operating temperature range | -- | -30 | 20 | 70 | ℃ |
| Power Consumption | |||||
| Sleeping Current | -- | -- | ≤3 | uA | |
| RX current | -- | -- | 60 | mA | |
| TX current (high output power) | @8v, 424.75MHz | 1400 | 1500 | mA | |
| TX current (low output power) | 850 | 900 | mA | ||
| TX current (high output power) | @4V, 424.75MHz | 1100 | 1150 | mA | |
| TX current (low output power) | 650 | 700 | mA | ||
| TX Frequency Parameter | |||||
| Operating frequency range | UHF | 400 | 450 | 480 | MHz |
| VHF | 134 | 150 | 174 | MHz | |
| TX current (high output power) | @VCC=4.0V | 30 | 31 | 32 | dBm |
| TX current (low output power) | 26 | 27 | 28 | dBm | |
| TX current (high output power) | @VCC=8.0V | 35 | 36 | 36.5 | dBm |
| TX current (low output power) | 30.5 | 31.5 | 32 | dBm | |
| Modulation frequency | @1.5KHz/2.5KHz frequency deviation | 10 | mV | ||
| Audio modulation distortion | @1.5KHz/2.5KHz Frequency deviation | -- | 2 | 5 | % |
| Signal to Noise Ratio | @1.5KHz/2.5KHz frequency deviation | 38 | 40 | 45 | dBm |
| Adjacent Channel Ratio | @12.5K offset | -- | -60 | dBc | |
| CTCSS Modulation frequency | 0.35 | 0.5 | 0.75 | KHz | |
| RX Frequency Parameter | |||||
| RX sensitivity | 13dB output audio SNR | -- | -124 | -- | dBm |
| RX SNR | @1.5 KHz Frequency deviation | 45 | 50 | -- | dB |
| Audio output power | -- | -- | 2 | -- | W |
| Audio output impedance | -- | -- | 8 | -- | OHm |
| Type | Analog walkie talkie |
| Output Power | 1W,4W |
Features of Walkie Talkie Module SA858
- UHF band 400~480 MHz
VHF band 134~174 MHz
(2 frequency bands are optional)
- Tx and Rx frequency can be set alone
- Band width 12.5/25 KHz
- Output power up to 4W
- Distance up to 7 to 10 km in Open area
- High sensitivity：-124 dBm
- High integrated and small size
- 38 CTCSS & 166 CDCSS (can be set by PC software and serial port)
- 8 adjustable digital volume
- Analog volume adjustable limitless
- High / low output power selection（1W/4W）
- Wide range of working voltage 3.3-9 V
- 0.5ppm TCXO, stable performance
Application of Walkie Talkie Module SA858
- Small professional walkie talkie
- Invisible intercom system
- Building community security system
- Sport products
- Handheld / Pocketable device
- Audio surveillance system
| Pin No. | Pin name | Description |
| 1 | MIC+ | Connect positive of external microphone |
| 2 | GND | Connect negative of external microphone or power ground |
| 3 | SPK/VOL | Eternal connect 8 ohm and 2W speaker and volume adjust electronic equipment |
| 4 | SPK | Audio output pin, external connect 8oHm and 2W speaker |
| 5 | H/L | RF high and lower power pin，connect“0” is lower power，off is high power |
| 6 | VOL | Audio volume adjust pin，external connect 200K adjustable electronic equipment |
| 7 | GND | External connect negative power |
| 8 | RXD | Data receive serial port |
| 9 | TXD | Data send serial port |
| 10 | VOXEN | Volume enable pin，“0” is open volume control function，“1”is close，default is“1” |
| 11 | PTT | Send/receive control pin，“0”is send；“1” is receive，default is receive |
| 12 | 8 | Frequency 16 channels, 8421code，No.8 bits，default is“1”output |
| 13 | 4 | Frequency 16 channels, 8421code，No.4 bits，default is“1”output |
| 14 | 2 | Frequency 16 channels, 8421code，No.2 bits，default is“1”output |
| 15 | 1 | Frequency 16 channels, 8421code，No.1 bit，default is“1”output |
| 16 | PD | Module sleep enable, “0” is sleep mode；“1”normal working，default is normal working mode |
| 17 | VCC | Connect positive power |
| 18 | GND | Connect negative power |
| 19, 21 | GND | Connect antenna ground |
| 20 | ANT | RF signal output，external connect 50oHm antenna |
