Bryston SP 1 Series Manual de usuario

SP1

SERIES

INSTRUCTIONS FOR BRYSTON

SP1 PRECISION

PREAMPLIFIER/PROCESSOR

For more information, call us today or visit our web site,

1-800-632-8216, www.bryston.ca

INTRODUCTION

Congratulations on your purchase of the Bryston SP1

precision pre-amplifier/digital processor-decoder.This product

will provide you with the finest available signal control and

DSP audio processing available. Like all Bryston products the

SP1 has been carefully designed and engineered to deliver a

lifetime of enjoyment.

Because the SP1 offers both pre-amplifier and digital decoding

functions it is very important that you thoroughly read this

manual BEFORE you install and use the SP1.

UNPACKING AND ELECTRICAL SAFETY

Your SP1 was carefully packed at the factory to protect

against any damage in shipping and handling. Carefully

examine the packing and the unit for any signs of external

damage or impact and report those to your dealer or Bryston

prior to using the unit.

ACCESSORIES

In the carton you should have found the following accessories

in addition to the SP1:

The Bryston Safety Manual

1 IEC standard power cord

1 SP1 Infrared Remote Control unit with backlight

1 9V Battery for the remote - must be installed

It is VERY IMPORTANT that you read and completely understand the

Safety Manual before installing or connecting the SP1 to any electrical

power source.

SP1 FUNCTIONAL LAYOUT

Below is a block diagram of the Bryston SP1. It shows the

signal flow and basic operational structure of the Surround

Processor and Preamplifier.

Figure 1: Block Diagram

POWER

The SP1 uses a dual mode electrical power system. In the

electrical power input module located on the right hand side

of the rear panel, adjacent to the IEC power cord socket is a

large computer-style switch that controls the main electrical

power to the unit.This is the ONLY switch that actually

completely turns off all power to the unit. Please see the

illustration below.

When the SP1 is connected to an appropriate AC power

source, and the power switch is switched to the ‘I’ position,

the unit automatically sets itself into a STANDBY power mode,

where-in only the minimum necessary circuitry to respond to

the remote control's power-on command or the momentary

power toggle switch on the front panel are active.

Activating the momentary POWER toggle switch (either up or

down) on the front panel or the POWER button on the

remote immediately takes the unit out of its STANDBY mode

into its normal operating mode.

The presence of AC power to the SP1 is indicated by the

illumination of the front panel LCD display, the illumination of

the LED corresponding to the source you last selected, and

the unit’s LED operating mode indicators.

[NOTE: If your unit's LCD backlight does not illuminate when the SP1 is

plugged into an operating outlet, and switched out of STANDBY mode,

please check to see that the rear panel main power switch {mains switch}

is in the ON position.]

If the SP1 is to be unused for an extended period of time (i.e.

a vacation) it is strongly recommended that it be turned off

using the main power switch on the back panel.

Figure 2 – Power Input

Module

CONTROLS AND CONNECTIONS - OVERVIEW

Front Panel Controls and Indicators

When looking at the front panel of the SP1 you will see the

following controls and displays from left to right:

1. Power [Momentary Switch]

Toggling this switch up or down takes the unit in and out of

its' Standby power mode (see above)

2. Standby and (IR) Infrared Activity Indicator

If this LED is continuously bright, it is an indication that the

SP1 is in Standby mode. When the SP1 is powered up, the

LED is OFF, and flashes when a valid IR code is detected.

3. (IR) Infrared Receiver/Sensor for remote control

4. Dynamic Range Control

This three position switch, which will operate only when the

SP1 is in a Dolby Digital mode, permits the adjustment of the

dynamic range (softest sound to loudest sound) of signal

sources producing a Dolby Digital bitstream.

Figure 3: Front Panel

A brief explanation follows:

There are two variables built into many Dolby Digital

bitstreams during the encoding process by the program

producers, that can enable decoders like the SP1 to provide

automatic gain control based upon the information supplied

by these data variables.

One of these two variables (labeled Dynrng by Dolby)

provides a type of compression useful for situations such as

late night viewing of programs with a wide dynamic range

(like many action movies).This function can also be used to

provide compression for program material that may require

enhancement of overall intelligibility (such as some older

soundtracks).

Another feature provided by this option is the necessary peak

limiting required avoiding signal overload when "downmixing"

functions are selected.

The second variable (labeled Compr by Dolby) provides

additional peak limiting to allow overall average program level

to be increased.

These two algorithms can provide sufficient overall gain

reduction to allow even high dynamic range soundtracks to

maintain good audibility at low volume levels.

In most cases as an integral part of the Dolby Digital encoding

process, a certain minimum amount of dynamic range

reduction will be automatically included in the bitstream to

ensure safe downmixing.The precise amount of this function

is selected by the program producers, and will to a degree

depend on the contents of the audio channels.

USING THE DYNAMIC RANGE CONTROL

For the majority of applications this switch should be placed

and remain in the middle or NORM position.

For late night viewing or at any time you wish to reduce the

overall dynamic range of a program the switch may be set to

the "LATE" (down) position.

If you wish to turn off all of the software's built-in dynamic

range management functions the switch can be set to the

"MAX" (up) position.

NOTE: Caution should be exercised when choosing this option. Many

smaller loudspeaker systems cannot handle the extremely wide range

signals produced in this mode. Overall system volume should be initially

set quite low until you or your dealer are able to determine the maximum

safe setting to avoid damage to your loudspeaker systems or power

amplifiers.

5. LCD Display window - contains the two line, black on

green 16 character per line alphanumeric display which

indicates the status and functional mode of the SP1.This

screen is also used during the menu-setup function for

calibration of the SP1 to your system.

On the first line, the decoding type [Dolby Digital, DTS, Pro-

Logic, Music, etc.] is displayed.A sample screen is shown

below: (FIG 4)

On the second line, the type of signal being detected from the

currently selected input is displayed.A sample screen is

shown below: (Fig 5)

Figure 4: Status display showing Dolby

Digital 5.1 channel signal at input

Figure 5: Status display showing analog

input signal and Pro Logic decoding

6. Menu Control Buttons

These three buttons labeled "<", ">", and "SEL" (SELECT) are

used to control the menu/setup functions displayed on the

LCD. To enter a menu mode, you can press any one of these

buttons. This will bring up the main menu.

All of the SP1 set-up and calibration operations are done using

these buttons and the LCD screen.

Navigating any menu or sub-menu is done using the two

arrow (< >) buttons. Once the desired submenu or function

is highlighted, pressing "SELECT" will make it the current

menu or function.

To exit a menu, or back up a step use the arrow buttons (< >)

to highlight the 'X' displayed in the lower right hand corner

of the LCD window and press "SELECT".

7. Source Selection Buttons and Indicators

Pressing any one of these buttons will instantly switch the

SP1's analog and digital inputs to read the indicated source.

If the SP1 is in its digital mode, as soon as any input is

selected and switched, the decoder will automatically try to

determine the new bitstream's type and mode

Mode Selection Buttons:

8. Digital Mode and Indicator

This button operates as a three way toggle function. The LED

immediately above the button has two colors - RED and

GREEN, and an OFF mode where it is not illuminated.

When Digital Mode is selected, the decoder will automatically

default to a digital signal for the selected input if one is

present.

If a digital signal is present and detected, the SP1 will

automatically determine the type of bitstream and select the

proper decoding mode.The indicator LED will turn green

when this happens.

If NO DIGITAL SIGNAL is detected the SP1 will default back

to the analog input for the selected source.This also

automatically puts the SP1 into its Digital Standby Mode.

When this occurs the LED indicator will turn RED

In this mode, the decoder will continually check the selected

source inputs for the presence of a digital signal. If one is

detected, the SP1 will automatically switch over to the pre-

selected digital operation mode for that source.

To defeat this auto-digital detect mode you must press the

button again. If you do the LED will go OFF.

When this mode of operation is selected the SP1 will look at

ONLY its analog inputs. If a digital signal does appear the SP1

will NOT recognize it and will remain in its analog only mode

until you press the Digital button again to either select the

digital source or place the SP1 into its auto detect mode as

explained above.

9. Analog Pro Logic and Dolby Digital Pro Logic Mode

Switch

In digital mode, this button will produce Pro-Logic decoding

on any 2 channel bitstreams.When this function is operational

the LED will turn green.

If Pro Logic decoding is NOT allowed with the current

bitstream (such as when a DTS signal is present), nothing will

happen when the button is pressed.

In the SP1 's analog mode, this button will produce standard

Pro Logic format decoding on the selected analog input(s).

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