UHF transceiver WA-TX-03S

radioISM bandRF

Discontinued Models

Overview
The WA-TX-03S (transmitter) and WA-RX-03S (receiver) are compact embedded audio modules providing 15 selectable RF channels in the harmonized European 863–865 MHz band. They offer selectable RF output (5 mW / 10 mW), a compander/expander noise-reduction chain and a wide dynamic range for clear voice and audio transmission. The modules come in small shielding cases and include most components required for rapid integration into professional audio equipment.

Features

• 863–865 MHz European audio band
• 15 channels with 125 kHz channel spacing
• Audio frequency response 50 Hz–13 kHz
• Selectable RF output: 5 mW and 10 mW (e.r.p.)
• Low power consumption
• Adjustable mute/squelch level
• Compact shielded module for embedding
• RED compliant (EN 301 357); UK Radio Equipment Regulations 2017

Applications

• Museum audio guides and visitor systems
• Tour-guide and interpretation systems
• Wireless conference and meeting systems
• Wireless microphones for amateur or low-power use
• Various short-range wireless audio links and monitoring

Specifications (excerpt)
Common
Emission type: F3E
Frequency: 863–865 MHz
Number of RF channels: 15 (125 kHz step)
Operating distance: 50 m (line-of-sight)
S/N ratio: ≥ 90 dB (W/IHF-A filter)
Audio frequency response: 50 Hz–13 kHz (±3.5 dB)
T.H.D.: 2% (AF 1 kHz, Dev.=20 kHz)
Operating temperature: 0 to 50 °C

Transmitter
Oscillation: crystal-based PLL
RF output power: 5 mW / 10 mW (e.r.p.)
Noise reduction: compander
Spurious emission: < 1 µW
Deviation: 20 kHz (1 kHz @ -25 dBv)
Audio input level: -113 to -13 dBv (1 kHz)
Audio input impedance: > 12 kΩ
Supply voltage: 4.2 to 6.0 V DC (operational 3.6–7 V)
Supply current: 50 mA (5 mW)/60 mA (10 mW)
Dimensions: 36 x 26 x 8 mm; Weight: 13 g

Receiver
Type: single superheterodyne
IF frequency: 10.7 MHz
Noise reduction: expander
Receiver sensitivity: -92 dBm (S/N 55 dB)
Squelch sensitivity: adjustable (external VR)
Audio output level: -10 dBv (Dev. 20 kHz)
Audio output impedance: < 20 kΩ
Supply voltage: 3.0 to 5.0 V DC
Current consumption: 45 mA
Dimensions: 36 x 26 x 8 mm; Weight: 13 g

Notes

• Modules are embedded-type in small shielded cases; evaluation/test boards are available separately to assist development and control of channel and mute level.
• These models are marked as discontinued on the product page.