• Portable 30 channel digital 1/3 Octave Analyzer.
• DSP30/30B microphone measurement range is 31dB to 123dB.
• DSP30A microphone measurement range is 65dB to 160dB.
• Captures full 85dB window with scales from ¼ to 5dB.
• Filters exceed ANSI specs.
• Comes with RS232 computer interface.
• A Demo Program is available. Download it here.
• Click here to read a review by Jim Gundlach, noted audio consultant.
• The DSP30 analyzes The NBA Finals at the Meadowlands! ( full story)

SPECIFICATIONS

Measurement Range:
25Hz - 20kHz.

Inputs:
Microphone: Balanced, XLR 3 pin receptacle

Outputs:
RS232 port: DB9M

Accuracy:
typically ±1%.

Display:
Test Result & SPL readings are 3 digit via 7 segment LED readout.

Power Requirements:
Batteries: Eight "AA" alkaline or nicad.

External: 12Vdc @ 500mA via 2.1mm jack.

Approvals: - Emissions: - EN 55022 B - FCC Class B

Immunity: - EN 55024 B

Size (W x H x D); Weight:
DSP2 - 10" x 10 ¼" x 2 ½"; 2 lbs.

Carry Case - 18" x 13" x 7"; lbs.

Case Material:
DSP2 - High Impact ABS.

Carry Case - Anodized Aluminum

The following standard features are supplied..

• DSP30: Model MK8A - 600 ohm omni-directional electret condenser instrument microphone.
  DSP30A: Model MK160 - 600 ohm omni-directional electret condenser instrument microphone.
  
• DSP30B: - With Intelligibility Package - Model TEF04 instrument microphone, Serial port, OPTSTIcis ^tm CD, Rugged carrying case.
• An 85dB window not limited by the display.
  
• Automatic Sum & Average function to normalize readings and stabilize pink noise.
  
• 60 active memories.
  
• IEC Flat, A, C or User designated curves.
  
• A Sum mode to sum and average response curves.
  
• A Subtract mode to subtract one memory from another.
  
• Keypad selectable filters: ANSI triple tuned or sharper for notching applications.
  
• Scales from ¼dB to 5dB.
  
• Multiple plot function.
  
• Export file function.
  
• Optional expansion features can be added anytime.
  
• Available in Rack Mount (DSP30RM) and Computer Interface Only (DSPCIW) models.
  
• All DSP series units can be interfaced with a computer using the RS232 port and available software.

The following standard features are supplied..

Measurement Range:
Microphone input: DSP30/30B: 31dB to 123dB SPL / DSP30A: 65dB to 160dB

Line input: -88dBm to +14dBm (.031mV to 3.88V rms)

Measurement window: 85dB

Inputs:
Microphone: Balanced, XLR 3 pin receptacle

Line: Unbalanced ¼" phone jack. 15k ohm impedance.

Outputs:
None (standard)

Printer port: DB25F (optional)

RS232 port: DB25M (optional), Standard on DSP30B

Center Frequencies:
ISO 1/3 octave between 25Hz - 20kHz.

Center Frequency Accuracy:
typically ±1%.

Relative Flatness Channel to Channel:
1/4dB.

Displays:
Audio Spectrum, 30 channel, 10 LEDs per channel, all channels scalable in ¼, ½, 1, 2, 3, 4, or 5dB SPL.

SPL & Reference readings are 3 digit via 7 segment LED readout.

Filters:
ANSI standard (triple tuned) & sharper than standard for notching applications.

Weighting:
IEC A, C, Flat or USER defined.

Decay Rate:
Fast = 34.7dB/s, Medium = 8.7dB/s, Slow = 4.3dB/s

Function Control:
16 button keypad.

Power Requirements:
Batteries: Eight "AA" alkaline or nicad..External: 12Vdc @ 500mA via 2.1mm jack

Approvals: - Emissions: - EN 55022 B - FCC Class B

Immunity: - EN 55024 B

Size (W x H x D); Weight:
10" x 10 ¼" x 2 ½"; 2 lbs.

Case Material:
High Impact ABS.

DSP30 Manual 284K unzipped.
DSP30A Specification sheet. 8.5K unzipped.
DSP30 Article by Jim Gundlach. 17.3K unzipped.