SR850 Basics

deviations can be expanded up to 100 times before they exceed full scale (at 1 mV sensitivity).

The analog output with offset and expand is

Output = (signal/sensitivity - offset) x Expand x10V

where offset is a fraction of 1 (50%=0.5), expand is an integer from 1 to 256 and the output can not exceed 10 V. In the above example,

Output = (0.91mV/1mV - 0.9) x 10 x 10V = 1V

for a signal which is 10 µV greater than the 0.9 mV nominal. (Offset = 0.9 and expand =10).

The X and Y offset and expand functions in the SR850 are output functions, they do NOT affect the calculation of R or θ. R has its own output offset and expand.

Trace displays

Only data traces may be displayed on the screen. In order to display the quantity X, it is necessary to define a trace to be X and then choose to display that trace.

Output offsets ARE reflected in data trace displays which depend upon X, Y or R. For example, a trace which is defined as X is affected by the X offset. When the X output is offset to zero, the dis- played trace value on the screen will drop to zero also. Any display which is showing a trace which is affected by a non-zero offset will display a high- lighted Offst indicator at the lower left of the display.

Output expands do NOT increase the displayed values of X, Y or R in data traces. Expand increas- es the resolution of the X, Y or R value used to calculate the trace value. For example, a trace which is defined as X does not increase its dis- played value when X is expanded. This is because the expand function increases the resolution with which the signal is measured, not the size of the input signal. The displayed value will show an increased resolution but will continue to display the original value of X minus the X offset. Any dis- play which is showing a trace which is affected by a non-unity expand will display a highlighted Expd indicator at the lower left of the display.

Complex data traces are displayed and stored in the actual units of the computed quantity. For

example, if a trace is defined as X•θ/Aux 1 and X=1 mV, θ=37°, and Aux 1= 2.34 V, then the trace value is 0.001 x 37/2.34 Volt•degrees per Volt or 0.01581 Vdeg/V. This value is not changed by the sensitivity (X is the input signal, not the output voltage) or by X expand. An X offset will, however, change the value of this trace.

Trace output scaling

What about CH1 or CH2 outputs proportional to data traces which are not simply X, Y, R or θ? If a trace is defined as A•B/C, then the trace output voltage depends upon the values of each parame- ter. Trace output voltages are calculated by deter- mining the output voltages for the individual quantities, A, B and C. The individual output volt- ages (-10 V to +10 V) are then combined using the trace definition to determine the trace output voltage.

For example, suppose a trace is defined as X/R. The parameters X and R scale as 10 V for a full scale input signal. If the sensitivity is 1 V and the measured values are X=500 mV and R=1 V, the X output would be 5 V and the R output would be 10 V. The trace output voltage is simply

(X=5 V)/(R=10 V)=0.5 V.

Output voltages for traces which are defined as A, B, A/C, B/C or A•B/C are calculated using the output voltages for A, B and C. Traces defined as A•B (A,B≠1, C=1) have output voltages which are the product of the A and B output voltages divided by 10.

For example, suppose a trace is defined as X•θ. The parameter X scales as 10 V for a full scale input signal and θ scales as 10 V for 180° of phase shift. If the measured X is 1 V on the 1 V sensitivi- ty, X would be 100% of full scale or 10 V. If the phase is 180°, then θ is also 10 V. The trace output voltage is thus, (X=10 V)•(θ=10 V)/10=10 V. The extra factor of 10 allows products of two full scale quantities to be output.

X, Y and R output offsets ARE reflected in trace outputs which depend upon X, Y or R. For exam- ple, a trace which is defined as X and output through CH1 or CH2 is affected by the X offset. When the X output is offset to zero, the trace output voltage will drop to zero also.

Output expands DO increase the output voltage of X, Y or R in trace outputs. Expand increases the

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SRS Labs SR850 manual Trace displays, Trace output scaling
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SR850 specifications

The SRS Labs SR850 is a high-performance audio processor designed to enhance the listening experience across a variety of applications. With its advanced technologies, the SR850 delivers superior sound quality that is particularly noticeable in environments where audio clarity and fidelity are paramount. This device caters to audio professionals, audiophiles, and casual listeners who demand exceptional performance from their audio systems.

One of the standout features of the SR850 is its proprietary SRS 3D Audio technology. This innovative feature creates a more immersive soundstage, allowing users to experience audio as if they were in a live performance setting. By adding depth and dimension, it elevates the listening experience, making music, movies, and games far more engaging.

Additionally, the SR850 incorporates SRS dialog clarity technology, which enhances speech intelligibility in dialogues and vocals. This is particularly beneficial in film and television viewing, where dialogue can sometimes be drowned out by background music or sound effects. With dialog clarity, users can enjoy crystal-clear conversation tracks without adjusting volume levels continuously.

The device also supports various audio formats, ensuring compatibility with a broad range of media. It boasts inputs for both digital and analog sources, allowing connections to various devices such as TVs, laptops, gaming consoles, and more. The versatility of inputs makes the SR850 a convenient addition to any home entertainment system.

Another impressive characteristic of the SR850 is its compact and user-friendly design. The intuitive interface makes it easy for users to adjust settings to their preference, whether they are a novice or an audio expert. The device is equipped with programmable presets, enabling users to store their favorite sound profiles, making switching between settings quick and hassle-free.

Furthermore, the SR850 features advanced EQ capabilities, granting users the ability to tailor the audio output to their specific tastes. This personalized approach to sound adjustment enhances the overall experience, allowing users to get the most out of their audio content.

In summary, the SRS Labs SR850 is a sophisticated audio processor packed with features designed to significantly uplift sound quality and listening pleasure. With its cutting-edge technologies such as SRS 3D Audio and dialog clarity, an array of connectivity options, and customizable EQ settings, the SR850 stands out as an outstanding option for anyone looking to enhance their audio experience. Whether for professional use in sound engineering or personal enjoyment in home entertainment, the SR850 proves to be a valuable asset.
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