White and Pink Noise Generator

The RDL ST-NG1 is a dedicated white and pink noise generator designed for two defined roles: serving as a reference noise source for audio measurements and supplying noise for masking applications. Its specified noise band extends from 20 Hz to 20 kHz, covering the stated audio-frequency range. Each source provides balanced line-level and balanced mic-level outputs, allowing the generator to interface with different points in an audio signal path without relying on a single output format.

Ideal Use Cases

The ST-NG1 is suited to audio measurement work that requires white or pink reference noise. Its balanced outputs make it applicable where either a line-level or mic-level signal is needed. It can also function as a masking noise source in systems designed to use generated background noise. With both white and pink spectral distributions available, the model addresses applications that call for either type of test or masking signal while keeping the source functionality focused on noise generation.

Why Choose This Model

A central advantage of the ST-NG1 is its combination of two noise distributions and two balanced output levels. Each source is specified with a +4 dBu balanced line-level output and a -45 dBu balanced mic-level output. The line-level output is adjustable from OFF to +8 dBu, while the mic-level output ranges from OFF to -40 dBu. These specified ranges provide flexibility when matching the noise source to measurement equipment, microphone-level inputs, line-level inputs, or other compatible audio devices.

Installation and Integration

The generator requires a ground-referenced 24 Vdc supply at 30 mA. The recommended power supplies are the PS-24AS for the USA and the PS-24AX for international use; the power supply is not included. Installation planning should account for both the required voltage and the ground-referenced power configuration. The specified ambient operating environment is 0° C to 55° C. Before integration, confirm that the connected equipment accepts the stated balanced line-level or mic-level signal and select the output range appropriate for that input.

Performance Highlights

The specified 20 Hz to 20 kHz noise band gives the ST-NG1 coverage across its stated audio range. White and pink spectral distributions support two common forms of noise used in audio measurement and masking work. On the line-level side, adjustment from OFF through +8 dBu provides control around the specified +4 dBu balanced output. For mic-level connections, the output extends from OFF to -40 dBu, with a specified balanced mic-level output of -45 dBu for each source. This combination of spectral and level options defines the unit’s practical versatility.

What Makes It Different

The ST-NG1 brings white noise, pink noise, balanced line-level output, and balanced mic-level output together in one dedicated model. That arrangement distinguishes it from a source limited to one noise distribution or one signal level. Documentation support includes a PDF specification sheet, engineering functional block CAD information in American DXF format, and front and end panel diagrams in American DXF format. High-resolution image resources are listed in TIF format. The unit is packaged in a cardboard box measuring 2 x 2 x 4 inches, with a listed shipping weight of 0.205 pounds and WEEE weight of 0.15 pounds.

Final Assessment

For systems that specifically need white or pink noise, the RDL ST-NG1 offers a clearly defined set of audio-source capabilities. Its 20 Hz to 20 kHz noise band, balanced line and mic outputs, adjustable output levels, and 24 Vdc power requirement make its integration needs straightforward to evaluate. It is a focused choice for audio measurement reference duties or masking-noise applications where the stated output formats and level ranges match the surrounding equipment.