DaytonAudio AS-1 User manual

AUDIOSTROBE
HANDHELD DIGITAL
STROBOSCOPE
Model: AS-1 User Manual

2
– Safety 1st
Read the following safety informaon carefully before aempng to operate or service the
Dayton Audio AS-1 Audiostrobe. For best performance and connued safe operaon, use the AS-1
Audiostrobe only as instructed in this manual
• Do not direct the ash toward any human or animal eyes.
• Do not expose the device to water or any other corrosive liquid.
• When placing the unit in extended storage, please remove the baeries to avoid damage
from baery leakage.
• You may clean the case with a dry cloth, do not use abrasives or solvents.
I – General Descripon
Dayton Audio’s AS-1 provides intermient illuminaon of an object for visual analysis. By adjusng
the frequency of illuminaon, objects in vibraonal or rotaonal movement can appear staonary or
in slow moon. This opcal illusion called visual persistence allows for a non-contact inspecon and
status of moving object surfaces well beyond the ability of the naked eye.
The Dayton Audio AS-1 Audiostrobe was specically designed with the loudspeaker enthusiast and
professionals in mind. The typical frequency response of a loudspeakers contains peaks, nulls and/
or resonances which are undesirable. The causes of such irregularies are dicult to see however
by synchronizing the ashes per second at or near the frequency of the inpued sine wave to the
loudspeaker, the loudspeaker seems moonless or in slow moon. This allows the loudspeaker
behavior to be observed even in well-lit rooms thanks to 36 super bright LEDs with total output of 1000
lumens.
The Dayton Audio AS-1 can oen help idenfy the cause of response defects and other useful
informaon of individual drivers as well as complete loudspeaker systems. These include but are
certainly not limited to the following:
• non-linearity e.g., rocking moons of the cone
• cone, surround and dust cap deformaons
• resonance modes in spider and nsel leads
• lead slap e.g., lead deformaon
• inverng spiders e.g., spider deformaon
• phase relaonship in mul speaker systems
• tuning frequency and behavior of passive radiators
• excursion limits of acve and passive drivers

3
II. Performance Features
* Using visual persistence to conduct non-contact measurement of objects in periodic moon and
detect defects on the surface.
* Strobe brightness of 1000 lumens Large LCD with backlight ensures a clear display of data
* Dual-scale tuning: single-step adjustment in coarse or ne tuning (Flashes Per Minute mode only)
and connuous adjustment (course/ne tuning).
* Automac power management conserves baeries by turning o the AS-1 aer sing idle for
approximately 7 minutes
* Low voltage indicator: the device will automacally indicate when the power supply voltage is
lower than required.
* The ergonomic ABS plasc shell is solid and comfortable to operate.
* Store up to 10 sets of ash frequency data to be retrieved at any me.
III. Technical Parameters
Measurement range and tuning:
Flashes Per Minute (FPM): 60 FPM-40000 FPM
• Tuning steps below 1000 FPM,
Coarse tuning: ±10 FPM
Fine tuning: ±0.1 FPM
• Tuning steps above 1000 FPM,
Coarse tuning: ±100 FPM
Fine tuning: ±1 FPM
Flashes Per Second (FPS): 1-665
• Tuning steps: ±1 FPS
Accuracy: 0.05%
Clock: 10MHz quartz crystal oscillator
Display: 5-digit LCD display with backlight
Stroboscope brightness: 1000 lumens (36 super bright LEDs)
Max.: 40000FPM / 665FPS
Power supply: baery: 4 × AA
Dimensions: 195 × 72 × 37mm
Weight: approx. 7 oz.

4
IV. Displays
1. Fine-tuning opon indicator.
2. Measuring data stored symbol. Press the data store buon, you will see this symbol show on the
LCD, when the data is stored, the symbol will disappear.
3. Measuring symbol, appears when measurement is in use.
4. Frequency value in FPS or FPM.
5. When indicated the AS-1 is in Flashes Per Minute mode.
6. When indicated the AS-1 is in Flashes Per Second mode.
7. Stored measurement data.
8. Baery level indicator.

5
V. Device Descripon
A. Flash Light source
B. LCD
C. Strobe light buon
D. Value increase buon
E. MEM buon; FPM/FPS convert
F. LCD backlight buon
G. Power switch, data retrieval buon Coarse / ne-tuning switch buon
H. Value decrease buon

6
VI. Operaon
1. Power on/o:
Open the baery compartment cover on the back of the shell, install baeries. Long press
the power buon to turn the unit on or o. Aer 3 seconds, the device will start and the
inial value of 4000 FPM will be displayed. If measurement data has been stored aer
previous use, the latest measurement data stored will be displayed.
2. Switch on the backlight:
Long press the “FINE/BL” buon to acvate the backlight, long press this key again to
deacvate the backlight.
3. Switch on the light source: (Hold the STROBE buon)
Flashing will begin when the device is powered on and the “TEST” buon is held.
4. Tuning switch: (FPM mode only)
Aer you start the device, the “FINE/BL” buon under FPM mode allows you to switch
between coarse and ne tuning. In the case of ne-tuning, the “FINE” icon will appear on the
le top of the display. In the case of coarse tuning, no prompt will appear.
5. Single-step regulaon of rotaon speed:
The “UP” buon or the “DOWN” buon controls the value of rotaon speed will increase or
decrease according to the step values described earlier in this manual.
6. Regulang the ashing frequency:
The device can also scan through speed sengs connuously. Hold the “UP” or “DOWN”
buon, and the device will begin scanning.
In coarse mode, the device will automacally increase or decrease by 100FPM (when the
tuning range≥1000FPM) or 10FPM (when the tuning range <1000FPM) every 0.2s.
In ne mode, the device will automacally increase or decrease by 1FPM (when the tuning
range≥1000FPM) or 0.1FPM (when the tuning range<1000FPM) every 0.2s.
Once you release the buon, the device will stop scanning
* (Regulaon limits: In any mode, when the upper limit of 40000FPM / 665FPS is exceeded,
the device will automacally remain at the 40000FPM / 665FPS. When the speed is lower
than the lower limit of 60FPM / 1FPS, the device will automacally remain at 60FPM / 1FPS.)
7. Data storage funcon:
Aer adjusng the speed, press the “MEM” buon in the center of the device panel to store
the current value. The next me the device is started, the latest measurement data stored will
be displayed. Aer saving, the pre-set data stored in the device can be retrieved at any me.

7
8. Data retrieval:
To retrieve the data stored in the device, press the “READ” buon, unl your desired preset is
recalled. Up to 10 pieces of frequently used data can be stored in the device. Every me you
start the device, the latest value stored in the device will be displayed.
9. Measurement and observaon of periodic movement:
Aer you start the device, press the light source buon, direct the light source onto your
desired object and observe the eects of the strobing and adjust the ashing frequency. If
the ashing frequency is matched to the same periodic movement of the object, the object
will appear staonary.
NOTE: The object will also will appear staonary if the ashing frequency is a factor (i.e.,
mulple) of the periodic movement of the object.
For example: If the input frequency (i.e., periodic movement) of a loudspeaker is 25 Hz the
loudspeaker will appear staonary at 50, 75, 100 FPS.
If the surface is obviously uneven or there are asymmetric texts, images, or marks on the
surface of the object at this point, the eect will be very obvious.
When texts, images or marks on the object appear stac and are not duplicated; the value
displayed on the device is the periodic speed of the object.
When texts, images or marks begin duplicang; the value displayed on the device is N mes
the speed value of the object where N is the number of visible duplicaons. Divide the value
displayed on the device by the number of duplicate texts, images, or marks to calculate the
actual speed value of the object.
If the surface of the object is relavely smooth, it’s suggested that the user ax a small label,
or mark a point on the rotang surface in order to easily observe the eect of the strobing.

Dayton Audio®Last Revised: 8/3/2022
daytonaudio.com
tel + 937.743.8248
[e-mail]
705 Pleasant Valley Dr.
Springboro, OH 45066
USA
5-Year Limited Warranty
See daytonaudio.com for details