The 'Audio Out' side of the three LEDs shows which wire and pin is under test and the 'Audio In' side shows which wires and pins to which it us connected, or if it is not connected to any. The two ends of the cable are connected to the appropriate 'Audio in' and 'Audio out' connectors.
To test cable connections, the mode switch is set to 'Cab test' and the test circuitry sends a test voltage from each of the connector pins in turn. Note: The output is on Speakon circuits 1+/1- and 2+/2- the padded (26dB) Speakon input also reads circuits 1+/1 and 2+/2. The signal content can be auditioned for anomalies on the built-in loudspeaker, its volume can be adjusted using the rotary control on the top surface. The incoming signal level is indicated by the right hand LED bargraph meter, from -19dBU to +8dBu in 3dB steps. To check the level and content of an incoming signal, the unit is switched on and the cable is connected to one of the 'Audio In' sockets. Input choices on the right are Speakon, isolated RCA (phono) socket, and a fully balanced 3-pin female XLR combined with a 3-pole, 6.35mm jack socket. Further output connectors are an isolated RCA (phono) socket, a fully balanced 3-pin male XLR and a 3-pole, 6.35mm jack socket. Both these are fed by a power amplifier capable of driving four ohm loudspeakers. On the left, the first output connector choices are a pair of terminals with sockets for 4mm plugs and a Neutrik NL4MD Speakon connection. At the lower end of the columns is the visual display that aids controls and settings. Above the columns, a row of three LEDs show if the unit is running off the internal battery, 110V AC or 240V AC.
The centre of this surface is dominated with two columns of LEDs which show audio output and input levels on the two banks of connectors which flank the LEDs.
The majority of controls and connectors are on the upper surface with all settings and functions aided by a single rotary controller and 2x8 character transreflective display. The Test Lab+ is constructed in a rugged steel case with a non-slip base, 168 x 130 x 58mm (LxWxH). The power inlet provides an indication of the presence and voltage of the AC supply illumination is provided for soldering or checking connectors.
Audio signal path generator#
The inbuilt signal generator can send low distortion tone at three frequencies or pink noise to external units. Tests include cable and signal path integrity of both remote and local signals using an LED bargraph and loudspeaker correct wiring of cable connectors by cycling through pins to reveal open, shorted or reversed connections.
Audio signal path portable#
Further optimised after input from audio professionals, the result is a portable test unit operated by battery or AC power where available. Categories By brand New products Audio and data connectors Video and RF connectors Power connectors, distribution and batteries Connection panels and stageboxes Fibre optic cables, connectors and interfaces Cable assemblies, patchcords and leads Cables Cabling accessories and tools Bags and cases Racks and enclosures Rack accessories and hardware Lights, clocks, furniture, fittings and equipment supports Drives, memory, media, labelling and sound effects Microphones Radio Microphones Microphone supports, amplifiers, powering and accessories Headphones, headsets, earpieces, amplifiers and wireless systems Hearing protection and noise control Record, replay and radio receivers Audio interfacing Video interfacing, processing, monitoring and camera accessories Audio mixers and processing Amplification Loudspeakers and audio monitoring Test and measurement Communications, conferencing and datacoms Assistive Listening Index By brand Index New products Special offers Clearance listĭesigned for engineers to provide swift but rigorous fault investigation, either on site or in the workshop, the Test Lab+ was conceived in the field by DACS installation engineers and developed by the company's design team to address the tests they needed to solve technical issues which arose during installation and live sound projects.
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