AT-3 Audio Tester Ultra

Split-unit audio testing tool with independent male and female XLR units
Remote signal testing and XLR Cable Testing with one unit on each end
Signal Generator emits 1 kHz tones or pink noise audio signals
XLR Input Metering to measure the strength of XLR input signals
Phantom Power Check to test voltage and ensure normal operation
Headphone and Speaker Monitoring to check input signals
Suitable for testing powered PA speakers, effect pedals, cables, DI boxes, IEM systems, mixers, and other audio equipment
Units charge via USB in 1.5 hrs and a full charge lasts up to 4 hours

Model Number: AT-3

This split-unit tool offers maximum flexibility for all your audio testing!

Signal Generator

Outputs a 1 kHz sine wave or pink noise audio signal through XLR male, 1/4″, and 1/8″ connectors, with three output level options: -10 dB, -20 dB, and -40 dB.

XLR Cable Tester

AT-3’s split-unit design allows you to test long cable runs with one unit at each end, to make sure all three pins of the XLR cable are functioning properly.

XLR Input Metering

Measures the input volume level of the XLR female connector.

Phantom Power Check

Tests the output voltage of the phantom power and ensures both pins are functioning properly.

Headphone and Speaker Monitoring

When an audio source is connected to the XLR female / 1/4″ input, you can monitor the signal with headphones or speakers via the 1/8″ headphone jack.

HOLSTER POUCH

Also included are a 1/4″ male to 1/4″ male adapter, and a USB-C charging cable

Specifications

	XLR Balanced Jack	1/4" Unbalanced Jack
1 kHz Tone Generator (±1 dB)	-40, -20, -10 dBu	-40, -20, -10 dBu
Pink Noise Generator (±1 dB)	-40, -20, -10 dBu	-40, -20, -10 dBu
Input Meter 'SG' Threshold	-20 dBu	n/a
Input Meter 'PK' Threshold	+10 dBu	n/a
Output Impedance	350 Ω	600 Ω
Input Impedance	3 kΩ	600 Ω / 3.5 kΩ

Phantom Power Voltage	solid: 44 - 52 V; flashing: 24 - 44 V	n/a
Cable Tester DC Voltage	3.3 V	n/a

1 kHz Tone Generator (±1 dB)	-40, -20, -10 dBu
Pink Noise Generator (±1 dB)	-40, -20, -10 dBu
Input Meter 'SG' Threshold	-20 dBu
Input Meter 'PK' Threshold	+10 dBu
Output Impedance	350 Ω
Input Impedance	3 kΩ
Phantom Power Voltage	solid: 44 - 52 V; flashing: 24 - 44 V
Cable Tester DC Voltage	3.3 V

1 kHz Tone Generator (±1 dB)	-40, -20, -10 dBu
Pink Noise Generator (±1 dB)	-40, -20, -10 dBu
Input Meter 'SG' Threshold	n/a
Input Meter 'PK' Threshold	n/a
Output Impedance	600 Ω
Input Impedance	600 Ω / 3.5 kΩ
Phantom Power Voltage	n/a
Cable Tester DC Voltage	n/a