These tools offer measurement of sound pressure level for noise measurement, audio line up, and acoustic testing, as well as screen brightness for display luminance set-up and audio to video delay for the adjustment of audio and video monitor signals. A test DVD set or a handheld generator provide suitable test impulses. They can measure 'lip sync' directly off the video screen, and align loudspeakers and displays to international standards; they work on all systems, HD or SD. The tools are offered separately, or as a cased set.
Smartlips Handheld Meter - Photometer, Sound Level Meter and Off-Screen
A/V Sync Meter
The battery powered instrument measures the visible brightness of surfaces in candelas per square metre, with a narrow field of view and a corrected eye response, for applications such as display luminance set-up. The sound level meter measures sound pressure levels using an integral microphone, and may be used for noise level measurements, multi-channel audio line up and acoustic testing. When in A/V sync mode. the meter indicates whether the audio signal from loudspeakers arrives early or late, referenced to a 'flash' on the video screen. The test signal consists of a simultaneous audio 'blip' and visual 'flash', such as SMPTE headers, VT clock, or test signal from the TSG DVD or the Smartlips generator.
The front panel has a back-lit, three-digit LCD display, a single control button and six -backlit indicators. The power button activates the instrument, and steps between the following functions and off. Photometer, SPL in dBC, SPL in dBA, audio visual sync. The two remaining indicators show 'audio early' and 'audio late'. Powering is two AA batteries, not included.
Sound pressure: 60-130dB SPL, either A or C (low) weighted. Photometer: 0-1999 candelas per square metre. A/V sync: +/- 0-800ms, referenced to the video 'flash'.
Optional accessories: AA size alkaline batteries.
Smartlips Handheld Generator
Again battery powered, the generator produces a simultaneous audio 'blip' from an internal speaker or via a miniature jack socket and a flash on a rectangular translucent screen, for use with a Smartlips handheld meter.
In use, a camera is zoomed into the screen, exposed for mid grey to generate a peak white frame flash. Audio can be picked up by a microphone, or by injecting the signal into a suitable mixer input. A simultaneous flash and audio 'blip' are produced. The resulting 'blip' from the loudspeakers should be 5ms late at one metre from the monitor, when measured by the Smartlips handset. Intended for use in the studio or on location, the generator works on all systems, HD or SD. A single switch turns the generator on and off, and there is a threaded bush on the side to mount on a microphone stand.
Peak luminance flash: Over 1000 cd per sq. metre Audio 'blip': 80dB SPL, 2kHz, 1m. Period: 4.5sec. Duty cycle: 1:200. Audio signal output: -10dBu, 1kHz. Power source: PP3 alkaline battery, approximately 25 days continuous operation, not included.
Optional accessories: PP3 size alkaline battery.
TSG DVD Set
This DVD set offers set-up and alignment sequences, and professional video tests, including audio and video alignment signals which may be used with the Smartlips meter. Apart from the obvious applications in setting up post-production, or playback display facilities, there are many audio-alone applications of these unique broadcast-level 5.1 audio tests.
Video chapters in both 16 x 9 and 4 x 3 formats include production checks, 100% bars, VT clock, pluge and safe areas. alignment, geometry and display tests, 601 active picture, grey scales and flat fields, ramps and ANSI checkerboard. test and analysis, with frequency bursts, zone plate and moving bars (MPEG test). Audio chapters in 5.1 format include production checks, EBU line-up, level ident and set-up, A/V sync. Alignment, frequency response bands down to 8Hz, phase and crossover, image pans and dynamic range tests. Test and analysis: critical BBC studio recordings at ITU levels, with and without limiters. The A/V Sync test track is a loopable sequence coded in both DTS and Dolby Digital.
Included accessories: The DVD set is supplied with a substantial manual explaining the standards and tests, and this provides linking with the international standards used in professional broadcasting.
The set consists of a Smartlips handheld meter, a Smartlips handheld generator and a TSG DVD set, contained in a fitted hard case, which has room for batteries. In addition there is an XLR to 3.5mm jack adapter for the audio output for the generator, which blocks phantom power voltage to avoid damage to the generator.
Included accessories: Manual, 2x AA, 1x PP3 alkaline batteries.