CASE-STUDY-BEACHTEK-DXA-SLR-ULTRA

CASE STUDY - BEACHTEK DXA SLR ULTRA
Beachtek Inc., 480 Osprey Ave, Kelowna, BC, Canada V1Y 5A5

The company name & logos, products name/models & p/n shown in this web page are properties of Beachtek Inc. ( Canada )

Case Study nr. VFF1621-DXA-SLR-U

DXA-SLR ULTRA Operating Manual

TECHNICAL REPORT
Technical Specifications	Declared by the manufacturer	Values measured in our tests
Maximum Input Levels	MIC level (LO gain) +10dBu MIC level (HI gain) -20dBu LINE level: +14dBu	MIC level / LO gain) +10.5dBu MIC level (HI gain) -21,6dBu LINE level: +14,6dBu
Output Level	-26dBu at 0dB on the VU meter	-26dBu at 0dB on the VU meter
Frequency Response	20Hz to 20kHz (+/- 0.5dB)	16Hz to 20kHz (+/- 0.25dB)
THD	Less than 0.01% @ 1kHz, -30dBu input	Less than 0.01% @ 1kHz, -30dBu input
S/N Ratio	85dB @ 1Khz, -30dBu input	82,5dB @ 1Khz (-30dBu input )
Gain	LO 0dB HI +30dB	LO 0dB HI +31,15dB ( best value )
Phantom Power	Dual regulated 12 or 48 volt power supplies Current to 14mA (direct short)	Dual regulated 12 / 48 volt power supplies Current to 13,42mA (direct short)
VU meter	-18 to +3dB in 3dB increments	-18 to +3dB in 3dB increments
Battery Type	One 9 volt alkaline or lithium battery	One 9 volt alkaline or lithium battery
Battery Duration	3 hours typical with alkaline battery (no phantom) 8 hours typical with lithium battery (no phantom)	2h,25' with alkaline battery ( without phantom) 6h,17' with Li-FePo4 battery ( without phantom)
Dimensions	6” x 3.75” x 1.75” (L x W x H) (152 mm x 95 mm x 44 mm)	6” x 3.75” x 1.75” (L x W x H) (152 mm x 95 mm x 44 mm)
Weight	Adapter 18 oz (0.51 kg) Rod Mount 8 oz (0.23 kg)	Adapter 18 oz (0.51 kg) Rod Mount 8 oz (0.23 kg)

Note ( meaning of colors )

Measured lower values

Measured exact values

Measured better values !!

Rate	98,65%
Final evaluation	Excellent

Technical Information

Frequency response : Frequency response measures the output level of a device at different frequencies

Distortion : Distortion is the alteration of the original shape and /or other characteristic

( Fs ) : Sampling Frequency

S/N ratio : Signal-to-noise ratio is a measurement that describes how much noise is in the output of a device, in relation to signal level

( dBu ) : Logarithmic voltage ratio with a reference voltage of V0 = 0.7746 volt ≡ 0 dBu

Link to On-Line Conversion Voltage V to Voltage level Lu (dBu) and LV (dBV)

VFF Institute feedbacks :

In relation to our tests and activities of field recordings, as well as a preamp system for use with mobile equipment (recording units for 2nd unit teams) respectfully we recommend the following technical modifications:

1)
To install internal connector female 3.5mm stereo jack for stereo microphone (with 3.5mm mini plug).

2)
To install internal connector two poles (not traditional plug with center pole = positive ) for connecting a second external module of rechargeable batteries (Li-MN / Li-ON / LiFePo4)

9 Vdc Dummy Battery Adapter ( Battery Eliminator )
See our photos of tweaks & modding only for test pourpose !

B.O.M.
( Bill of materials )

1	9vdc empty battery box from old defective rechargeable battery Do not dismantle alkaline batteries! It's dangerous !
1	Box with standard Switch On / Off single pole
1	30 cm Shield Cable ( Ext shield + 2 poles AWG29 ) Important: Connecting the ext-shield ground to negative pole!
1	DC Female standard Plug 3,5 mm or two poles female connector like Lemo push-pull EGG.0B.302.CLL 0B Series, 2 Pole Female Straight Panel Mount Circular Connector with Shell Size0 , or similar.

SCHEMATIC

VFF APPROVAL CERTIFICATE
EM09-CA01-VFF568

TECHNICAL INFORMATION

Note :
- All various tests were carried out only by technical staff of the VFF Institute Marenostrum e.V.

- All equipment and electronic devices used for the various tests are calibrated and checked every month.

- Only Open-source software Utilities are used in our test procedures, with respective operating systems:

archlinux	Q-UBES Virtual Op.System	WHONIX Anonymous Operating System
ARDOUR Digital Audio Workstation	UBUNTU STUDIO	WHONIX Anonymous Operating System
CentOS Project Op. System	TAILS 1.5	ZORIN Op.System

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