A UHF wireless microphone system usually consists of two main parts: a transmitter (TX) and a receiver (RX).
Specifications
Specification / Parameter
Typical / Common Range or Value
RF Carrier Frequency Band
UHF — often somewhere in the ~ 500 MHz to ~ 900 MHz range, depending on region and licensing.
Number of Channels / Available Frequencies
Many systems support multiple selectable channels — sometimes dozens (e.g. 100+ or 200 selectable channels depending on model).
Transmitter RF Output Power
Typical RF power output around ≈ 10 mW in many systems; some may go up to 30 mW (switchable depending on range/battery) for longer transmission range.
Audio Frequency Response
Commonly ~ 40 Hz – 18 kHz (or similar) — enough to cover the full vocal/instrument range.
Dynamic Range / Signal-to-Noise Ratio (SNR)
Many decent systems quote > 100 dB dynamic range or SNR for audio path.
Total Harmonic Distortion (THD)
Often < 0.5% (or similar low distortion spec) under normal modulation / deviation conditions.
Operating / Transmission Range (Line‑of‑Sight)
Common working range values: **~ 50 – 100 meters** under good conditions; some systems up to ~ 150 m+ depending on power, environment, antennas.
Receiver Sensitivity / RF Receive Threshold
Example: –95 dBm to –105 dBm (for 12 dB SINAD) for reliable reception depending on system.
Output / Audio Interface (Receiver Side)
Balanced (XLR) and/or unbalanced (¼″ / TRS or 3.5 mm) audio outputs to connect to PA, mixer, amplifier, recorder, etc.
Transmitter Power (Batteries)
Handheld or body‑pack transmitters often run on 2 × AA batteries (or equivalent).
Typical Battery Life (Transmitter)
Often **~ 8–12 hours** continuous use per set of batteries (depending on power output, battery quality).
Operating Conditions / Temperature Range
Common operating temperature range: roughly –10 °C to +50 °C (or similar) depending on manufacturer.
Modulation / Transmission Mode
FM analog modulation is common in many UHF wireless mic systems.
