Shure UA874 Active Directional Antenna
Shure·Model UA874US·shure-ua874us
Photos
Manufacturer product photography — the drawn faceplate above stays true to panel layout; these show the hardware itself.
About the Shure UA874US
The UA874 is the standard Shure paddleA directional antenna (paddle, LPDA, helical) aimed at the stage — focuses coverage where the performers are and rejects RF from elsewhere. for remote-mounting receive antennas: a directional log-periodic array with a built-in amplifier whose four-position gainHow much the preamp amplifies the incoming signal. Too low and you’re hunting through hiss; too high and peaks clip. switch exists to make up long coax runs, not to "boost range". Its 70-degree beamwidth aims the pickup at the stage and rejects the audience-side RFRadio Frequency — the wireless part of wireless. RF planning is why big rigs scan, coordinate, and combine antennas instead of hoping. junk, and the RF overload LED tells you when +12 dB was the wrong answer. It draws its bias power over the same BNCThe twist-lock coax connector used for word clock and antenna runs — it locks, so it can’t be pulled out mid-show. coax from a UA844+/UA845 distroOne pair of antennas feeding many receivers through an amplified splitter — replaces the forest of whips and keeps RF levels consistent., so the stage end stays a single cable.
Active log-periodic paddleA directional antenna (paddle, LPDA, helical) aimed at the stage — focuses coverage where the performers are and rejects RF from elsewhere., 470–698 MHz (US), 7.5 dBi on axis. Switchable amp: +12 / +6 / 0 / −6 dB. Powered by 10–15 V DC bias over the coax (75 mA) from the antenna distroOne pair of antennas feeding many receivers through an amplified splitter — replaces the forest of whips and keeps RF levels consistent. — no local power jack. Receive only.
I/O Ports (1)
| Port | Connector | Direction | Signal | Channels |
|---|---|---|---|---|
| RF Out + DC Bias In (BNC) | BNC | output | antenna | — |
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