Data Storage
Up to 3000 third-octave spectra can be saved in the nonvolatile RAM-disk memory.   Up to 1000 third-octave spectra can be measured and stored at a rate of 256 spectra/s.

General

• Power: Internal battery power; rechargeable during operation
• Weight: Approximately 3.2 kg (7 lbs)
• Size: 210 mm W x 300 mm H x 95 mm D (8.25" x 11.75" x 3.75")
• Accessories included: Battery, ac adapter, carrying case, SDF utilities.

Options
Opt AY2 Narrowband FFT
Opt AY3 Reverberation Time

• Frequency response, spectrum, transient analysis
• 6 hr (typical) operation on rechargeable battery pack
• Lightweight (3.2 kg/7 lbs.) and portable
• Multispectrum display
• 1/3 and 1/1 octave analysis
• Online zoom for greater resolution
• Octave and 1/3-octave resolution measurements are made in real time
• Optional FFT mode provides from 100 to 1600 lines of linear frequency resolution

Reverberation time analysis can be added as an option.  An ICP and microphone input mode can directly power accelerometers and microphones so external signal conditioning is not required.  Built in pink and white noise sources provide a convenient source for reverberation time and stimulus/response measurement.

Measurements can be printed on HP DeskJet or HP LaserJet printers, or HP-GL plotters via RS-232.  Stored data can also be transferred to a computer via RS-232 and is compatible with Hewlett-Packard's SDF (Standard Data Format) which allows data transportability to other Hewlett-Packard dynamic signal analyzers and third-party analysis packages.

Specification Summary

Octave Mode

• Frequency: maximum span of 36 bands plus two overall bands
  1/3 octave bands, single channel: 1.6 Hz to 20 kHz (real time)
  Octave bands, single channel: 2.0 Hz to 16 kHz (real time)
  Maximum octave bands, dual channel: 10 kHz (1/3) and 8 kHz (1/1)
• Dynamic range: 72 dBfs
• Input ranges: 70 to 130 dB SPL in 10-dB steps (5 mV to 5 V)
• Weighting filters: A-weight, C-weight, linear, flat (all pass)
• Measurement results: Leq, SPL (maximum), SPL (minimum), LM, PSD
• Averaging: Integration and exponential; from 3.9 µs to 100, 000 s

Narrowband Mode (Opt AY2)

• Frequency: 100 to 1600 lines of resolution
  Baseband spans: 50 Hz to 25.6 kHz
  Digital zoom spans: 20 Hz to 10 kHz
• Windows: Uniform, Hann, flat top, force/exponential
• Measurement results: Spectrum/SPL, power spectral density, time, differential time, frequency response, coherence, cross-correlation, cross-spectrum

Reverberation Time Mode (Opt AY3)
Computes reverberation time in octave or 1/3 octave bands by using Schroeder's reverse integration method to compute the decay times,.  Single channel; maximum bandwidth is 11.4 kHz; minimum integration time is 3.9 µs.