Unika SDI-1 Owner's Manual

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Unika SDI-1 Owner's Manual | Manualzz

Stage Series

Made in Taiwan

USER GUIDE

SDI-1

Index

Overview

Features

Audio Connection

Various Instruments/Device

Connection

Input PAD Attenuation

Eliminating Hum and Buzz and the

Ground Loop

Specifications

Measurement

Unika Electronic Co., Ltd.

w w w . u n i k a p r o . c o m

6F, No.168, Xin-Hu 2nd Rd.

Nei-Hu District, Taipei City. 11494.

Taiwan, R

.

O.C.

  

+886 2 27933017

  

+886 2 27928264

  

[email protected]

UNiKA SDI-1 User Guide

OVERVIEW

The UNiKA SDI-1 is an easy-to-use, single-channel, passive direct box for musical instrument and audio system applications. In addition to a highquality audio transformer, the SDI-1 has some very useful built-in features.

So please take a few minutes to go through this user guide to ensure you take full advantage of the facilities on offer and get the best possible result.

   [email protected]

  

If you need further information, please email us and we will do our very

   best to help.

FEATURES

• Single-channel, high-impedance, direct input for an electronic musical instrument or line-level audio source from a music player or computer.

• ¼“ TS LINK socket. A parallel-wired connector which feeds the direct input signal to another destination such as instrument amplifier.

• Selectable, 3-step attenuator acting on the high-impedance (hi-Z) direct input signal.

• Single-channel XLR. A transformer-isolated, balanced, low-impedance

(low-Z) output.

• Ground lift switch acting on pin-1 of the balanced output.

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UNiKA SDI-1 User Guide

① ② ③

④ ⑤

① ¼“ TS LINK socket: a parallel-wired direct feed from the input. It can be

  linked to instrument amplifier.

② High-impedance direct input with Combo jack: connect to output of electronic

  musical instrument or audio device using XLR or TRS, TS jack plugs.

③ Input PAD: 0dB, -20dB & -40dB selectable 3-step attenuator reduces the

  input sensitivity to prevent overload.

④ GGround lift switch: lifts the pin-1 on the XLR output connector to help

  eliminate hum and buzz caused by ground loops.

⑤ Balanced XLR output: low-impedance output with isolation transformer.

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UNiKA SDI-1 User Guide

AUDIO CONNECTION

Instrument Direct input & Parallel Link connection

As with all audio gear, always ensure audio system levels are turned down or equipment turned off before making connections. This will avoid plugin or turn-on transients from damaging more sensitive components such as tweeters.

There is one channel on the SDI-1, featuring an XLR- ¼“TRS Combo jack

INPUT, a ¼“ TS parallel LINK output and a balanced XLR OUTPUT.

Connect your source instrument or audio device to the input and the balanced XLR output to the mixing console. The LINK connector output provides the means for connecting the signal to an instrument amplifier or personal monitor system. Unbalanced cables are much more susceptible to noise than their balanced counterparts. Keeping unbalanced cables under

8 meters (25 feet) in length is good practice while balanced cables can easily extend to 100 meters (300 feet). The balanced output of the SDI-1 is mic level, meaning that it should be connected to the mic input of a mixing console or mic preamp.

Female

2

3

1

Male

1

3

2

XLR-TRS Combo input

2-Signal Hot +

3-Signal Cold -

1-Ground

Fig-1: XLR Plugs Balanced

    connection:

  

1-Ground

  

2-Signal Hot (+)

  

3-Signal Cold (-)

Fig-2: XLR-¼"TRS Combo

    socket for direct input

For Unbalanced connection, pin-3 should be connected to Ground with pin-1.

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UNiKA SDI-1 User Guide

Tip-Signal (+)

Sleeve-Ground

Tip-Signal Hot (+)

Ring-Signal Cold(-)

Sleeve-Ground

Fig-3: ¼"TS Unbalanced connection Fig-4: ¼"TRS Balanced connection

VARIOUS INSTRUMENTS/DEVICE CONNECTION

Fig-5: Instruments, Guitar to instrument amps & console

Fig-6: Stereo keyboard to instrument amps & console

Fig-7: Audio device / player / computer to active speaker/PA system

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UNiKA SDI-1 User Guide

INPUT PAD ATTENUATION

The most common use of the direct input is with guitar pick-ups, keyboards or audio devices like CD players, computers etc. The optimal setting for this is most likely with the pad switch set to 0dB, although with some high-output pick-ups the performance of the direct input may be improved if the pad switch is set to -20dB to prevent possible clipping of the input signal.

The instrument is connected to the XLR-¼“Combo jack socket using a TS jack plug, and a parallel link feed taken from the LINK TS jack socket to the instrument amplifier.

The direct input can also be fed either from a line-level output from the headamp (pad set to -20dB) or from the head-amp speaker output (pad set to

-40dB).

ELIMINATING HUM AND BUZZ AND THE GROUND LOOP

The SDI-1 is equipped with output isolation transformers to eliminate hum and buzz caused by stray DC voltage and ground loops.

Computers, CD players and other consumer equipment can be noisy

-

this is particularly true when incorporating audio with a projector - so isolation transformers can be very useful when combating system noise.

The Ground Lift switch on the output takes this one step further by lifting pin-

1 on the XLR. Computers are often the source for noise problems in audio systems, so greater care is certainly needed to keep things quiet.

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UNiKA SDI-1 User Guide

SPECIFICATIONS

Circuit design

Input connectors

Link connectors

Input pad switch

Input DC impedance

Max. input level before clipping

Output device

Output DC impedance

Output level

Frequency response

Dynamic range

S/N ratio~ un-weight 20Hz to

20KHz

T.H.D~ 1KHz, 0dBV output

Ground / Lift switch

Construction

Surface finished

Dimension (WxDxH)

Weight

Shipping weight

Packing per carton

Shipping dimension per carton

(

Specifications are subject to change without notice.

)

Passive, transformer isolated

Unbalanced combo jack

( Pin-2 hot, Pin3&1 ground )

Unbalanced phone jack

0dB / -20dB / -40dB

0.82KΩ / 40KΩ / 44KΩ

+26dBv

XLR w/balance transformer isolated

1.08KΩ nominal, Transformer balance

+26dBv

20Hz to 20KHz ±0.5dB

>109dB

-129.8dB

< 0.0009%

Lift pin-1 on XLR outputs

1.6

/ 1.2mm steel cabinet & chassis

Durable powder coating

124 x 78 x 46 mm

0.5Kg

0.6Kg

20pcs / 13Kgs

350 x 310 x 207mm

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UNiKA SDI-1 User Guide

MEASUREMENT

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UNiKA SDI-1 User Guide

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UNiKA SDI-1 User Guide

MEASUREMENT

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UNiKA SDI-1 User Guide

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