Reference and Phase Menu

Reference Source

Ref. Source

External

Ref Slope

Sine

Ref. Source

Internal

Ref Frequency

50.000 Hz

The Reference Source key selects the source of the lock-in reference. Turn the knob to select the desired source, either Internal , Internal Sweep, or External. Keypad entry is not allowed for this entry field.

External When the reference source is External, the SR850 will phase lock to the external reference provided at the Refer- ence Input BNC. The SR850 will lock to frequencies between 0.001 Hz and 102.0 kHz. The upper limit is reduced to 102 kHz/N where N is the harmonic number if N is greater than 1.

Ref Slope This key selects the reference input discriminator mode. This selection is only available when the reference source is external.

When either TTL Rising Edge or TTL Falling Edge is selected, the SR850 locks to the selected edge of a TTL square wave or pulse train. For reliable operation, the TTL signal should exceed 3.5 V when high and be less then 0.5 V when low. The input is directed past the analog discrimi- nator and is DC coupled into a TTL input gate. This input mode should be used whenever possible since it is less noise prone than the sine wave discriminator. For very low frequencies (<1 Hz), a TTL reference MUST be used.

Sine input mode locks the SR850 to the rising zero cross- ings of an analog signal at the Reference Input BNC. This signal should be a clean sine wave at least 200 mVpk in amplitude. In this input mode, the Reference Input is AC coupled (above 1 Hz) with an input impedance of 1 MΩ. This mode can not be used at frequencies far below 1 Hz. At very low frequencies, the TTL input modes must be used.

Internal When the reference source is Internal, the SR850's syn- thesized internal reference is used as the reference. The Reference Input BNC is ignored in this case. In this mode, the Sine Out or TTL Sync Out provides the excitation for the measurement.

Reference Frequency Pressing this key selects the internal oscillator frequency as the active entry field. This field is only available when the reference source is internal. The frequency may adjust- ed with the knob or directly entered from the keypad. The frequency has 5 digits or 0.1 mHz resolution, whichever is larger.

The frequency can range from 0.001 Hz to 102.00 kHz. The upper limit is decreased if the harmonic number is greater than 1. In this case, the upper limit is 102 kHz/N where N is the harmonic number.

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SRS Labs SR850 manual Reference and Phase Menu, Reference Source
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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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