Shure A15TG
Battery Powered Tone Generator


The Shure A15TG Tone Generator is a battery-powered 700 Hz signal source that can be used to troubleshoot low-impedance, balanced-line microphone inputs.

The A15TG includes a recessed On-Off switch and a three-pin XLR audio connector. A removable end cap allows easy battery installation and removal. The A15TG can also tolerate the presence of phantom power, or a short circuit in the line it is driving. Built-in short circuit protection allows normal operation to resume after a short is removed.

The A15TG can operate continuously for approximately 1000 hours on one 1.5V alkaline battery. To conserve battery power, make sure the On-Off switch is in the Off position when the A15TG is not in use.

Shure A15TG Tone Generator Specifications:
  • Output Frequency: 700 Hz ±20%, when terminated with 150 ohms
  • Output Level: –41.5 ±4.5 dBV (8.4 mV typical) when terminated with 150 ohms
  • Total Harmonic Distortion: 5% typical for any output termination greater than or equal to 150 ohms
  • Output Impedance: <15 ohms
  • Battery Type: 1.5 V alkaline
  • Temperature Range:
    • Operating: –12° C to 50° C (10° F to 130° F)
    • Storage: –29° C to 74° C (–20° F to 165° F)
  • Case: Steel with gray enamel finish
  • Dimensions: 3/4" Dia. x 5-17/32" L (19 x 141 mm)
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