PORTABLE ONE PLUS Audio Precision Audio Analyzer Used

Square Wave

• Frequency Range: 20 Hz–30 kHz
• Amplitude Range
• Balanced: 0.71 mVpp to 34.73 Vpp
• Unbalanced: 0.71 mVpp to 17.36 Vpp
• Amplitude Accuracy: ±0.3 dB [±3.5 %] at 400 Hz
• Rise/fall time: Typically 2.5–3.0 μs

Digital Signal Generator

Digital Output Characteristics

• Output Formats: AES/EBU (per AES3-1992); SPDIFEIAJ; Optical
• Sample Rates: 28.8 kHz–99.9999 kHz
• Sample Rate Accuracy: ±0.002% [±20 PPM] lockable to external reference
• Word Length: 16 to 24 bits (even values)

THD+N Measurements

• Fundamental Range: 0.02% to 45% of sample rate (10 Hz–22.0 kHz at 48.0 ks/sec
• Residual THD+N: ≤–138 dBFS
• High pass Filters: 22 Hz, 400 Hz 2-pole Butterworth
• Low pass Filters: 15 kHz, 20 kHz 6-pole elliptic lowpass
• Weighting Filters: ANSI-IEC “A” weighting; CCIR QPK; CCIR RMS

The Portable One Plus measures amplitude, signal-to-noise, distortion (THD+N) , SINAD, IMD (option), frequency, wow & flutter, input impedance plus AC mains check. Portable One Plus Access includes comprehensive analog generation and measurement, with two outputs and two inputs. Easy-to-set-up sweep capability produces graphs of frequency response, distortion vs. frequency and even amplitude sweeps. Non-volatile storage of up to 30 tests allows easy one-button recall of your favorite test setup. Connect Portable One to a compatible printer and produce reports incorporating high-resolution graphs.

Easy to Use

Measurement functions are simply selected from the front panel. Just press a button and make the measurement. Selection of analog and digital inputs is clearly indicated on the front panel with LED legends. Portable One makes graphs of swept measurements in real time on the high contrast back-lit LCD display, including both frequency and amplitude sweeps. Hard copy high-resolution graphs, compact screen-sized graphs or tabular data listings can be made from your Portable One to laser or ink jet printers at the touch of a button. Bargraphs can display measurements ranging from AC mains power line distortion to digital interface error rate …and nearly everything in between. Separate buttons and knobs provide independent control of frequency and amplitude. The buttons provide large and medium steps (decade and 1/3 octave steps for frequency, 10 dB and 1 dB for amplitude), with knobs for finer resolution. When not otherwise used, the setting knobs and buttons also provide a convenient human interface for scrolling display cursors and for entry of other settings and data.

Save & Recall Tests:

Save 30 instrument setups, including sweep results data, time-stamped from the internal clock calendar. Use for repeatable, easy bench and production testing or when in the field, for storing test data to be printed or analyzed later. Each saved test includes all settings for the entire instrument, a default description or your own title for the test, the date and time, and the last test sweep result data.

Portable One prints graphs, panel setups and measured data either to laser (PCL compatible) or inkjet printers. Front panel keys select two sizes of graph output (including cursor data), tabular sweep data, bargraphs and front panels for printing.

For a quick print, a compact graph provides a direct replication of the LCD screen. A larger graph printout covering approximately half a page (360x280 pixels with grid lines) allows finer detail to be shown. Both graphs show key instrument setup parameters as well. Tabular data values for all swept points may be printed in order to preserve exact reading values.

The bargraph displays, with their useful minimum/maximum indicators print just as they are seen on the display, as do any desired instrument panels. Various printouts may be combined on one page, to include graphs, bargraphs and numeric data.

Internal Clock/Calendar

An internal clock/calendar automatically stamps the time and date on setups and data as they are saved. You can view or set the clock/calendar from the Setup panel.

GPIB Control:

An IEEE-488 Interface is built in to allow control of the instrument in an automatic test environment. National Instruments LabWindows/CVI and LabVIEW drivers are available. A LabWindows/CVI soft front panel program is provided with a Windows user interface for real-time instrument control through the GPIB interface. The LabVIEW driver is provided with a Getting Started VI and sample VIs.