Users Manual - GOLD LINE

1 Users Manual DSP30 Digital RTA GOLD LINE Box 500 W. Redding, CT. 06896 Tel: 203-938-2588 Fax: 203-938-8740 E-mail b i1. INTRODUCTION:..1 2. FEATURES & NEW WINDOWS FEATURES:..1 SCALES:..1 INPUTS:..1 MICROPHONE INPUT:..1 LINE INPUT:..1 FILTERS:..1 MEMORIES NOT STORED TO DISK:..1 SCROLL FUNCTION MODELS DSP30 AND DSP30RM:..2 WEIGHTED CURVES:..2 SUM MODE:..2 AUTO SUM AND AVERAGE:..2 SUBTRACT MODE:..2 DECAY:..2 AVERAGE:..2 PEAK:..2 PEAK HOLD:..2 AUTO LEVEL.

2 2 SPL MODE:..2 STORE:..2 DIFFERENCE MODE:..2 WATERFALL DISPLAY:..3 CURSORS:..3 NOISE CRITERIA:..3 3. THE FRONT PANEL:..3 SPECTRAL DISPLAY - MODELS DSP30/DSP30RM:..3 KEYPAD & DISPLAY FUNCTIONS:..3 INDICATOR WARNING LEDS:..3 FLASHING AUTO LED:..3 BATTERY LOW INDICATION:..3 OVER RANGE:..4 4. INSTALL BATTERIES:..4 BATTERIES:..4 NICAD & NiMH BATTERIES:..4 ALKALINE BATTERIES:..4 5. BATTERY ELIMINATOR - AC TO DC ADAPTER:..4 6. OPERATION:..4 THE KEYPAD:..4 RTA MODE:..4 AUTO ADJUST:..5 SET THE SCALE (dB/step):..5 SET WEIGHT:..5 SET DECAY:..6 SET FILTERS:..6 SET AVERAGE/PEAK.

3 6 SET PEAK HOLD:..6 7. TIME AVERAGING MEASUREMENTS MADE WITH PINK NOISE:..6 8. STORE:..7 9. AVERAGE THE SUM OF THE STORED MEMORIES:..8 ii10. SUBTRACT STORED MEMORIES:..8 11. REFERENCE LEVEL:..8 12. DISPLAY:..8 13. LEVEL WINDOW:..8 14. SAVE TO NON-VOLATILE MEMORY:..9 15. RECALL NON-VOLATILE MEMORY:..9 16. PRINT (PARALLEL PORT):..9 PRINT AN ACTIVE MEMORY:..9 PRINT THE DISPLAY:..9 PRINT A NON-VOLATILE MEMORY:..10 17. HARDWARE INSTALLATION RS232 WITH WINDOWS:..10 18. SOFTWARE INSTALLATION:..10 19. RS232 OPTIONAL HARDWARE:..10 20. EXPORT DATA - WINDOWS VERSION.

4 11 21. RT60 GENERAL:..12 GENERAL CONCEPTS:..12 COMMON PROBLEMS:..12 22. RT60 INSTRUCTIONS: MODELS DSP30/DSP30RM (NO COMPUTER REQUIRED):..12 ENTERING OR EXITING RT60 MODE: (NO COMPUTER):..12 DEFAULT SETTINGS:..13 22A. USING THE OPTIONAL RT60 CD:..14 CALIBRATION:..14 MEASUREMENT:..14 DISPLAYING RESULTS:..14 23. RT60 OPERATION FOR WINDOWS:..15 24. SPEAKER TIMING ANALYSIS:..16 ACOUSTICAL PROPAGATION:..16 HAAS EFFECT:..17 CALCULATING THE DISTANCE:..17 CALCULATING THE DIGITAL DELAY:..17 ELECTRICAL PROPAGATION:..17 THE TEST PULSE FREQUENCY:..17 25. MEASURING THE REQUIRED DELAY FOR MULTIPLE LOUDSPEAKERS.

5 17 26. MULTIPLE LOUDSPEAKERS WITH HAAS EFFECT:..19 27. ELECTRICAL PROPAGATION DELAY - QUICK FIELD CHECK:..19 28. USING THE STA OPTION AS A YARDSTICK:..19 29. DISTORTION ANALYSIS:..20 iiiTO MAKE DISTORTION MEASUREMENTS:..20 30. DOSIMETER/OCTAVE BAND MEASUREMENTS WITH COMPUTER:..20 TO MAKE DOSE MEASUREMENTS WITH WINDOWS:..20 TO PRINT FROM DOSE MODE VIA THE WINDOWS INTERFACE:..21 30A. DOSIMETER MEASUREMENTS WITH STAND-ALONE DSP30 (NO COMPUTER):..21 OTHER FUNCTIONS WHEN IN THE DOSE MODE:..22 PRINTING A REPORT VIA THE PARALLEL PRINTER PORT:..22 31. 1/6 OCTAVE ANALYSIS.

6 22 32. 1/12 OCTAVE ANALYSIS:..23 33. NOISE CRITERIA ANALYSIS:..23 34. IMPEDANCE MEASUREMENTS:..24 35. MULTIPLOT FUNCTION:..24 36. user DEFINED APPLICATIONS:..24 OPTION 024:..24 OPTION 027:..24 OPTION 029: RECALL user CURVE:..25 37. EQUALIZING A SOUND SYSTEM WITH THE DSP30/DSP30RM/DSPCIW:..25 38 REAL-TIME ANALYSIS AND EQUALIZATION FOR MUSIC SOUND REINFORCEMENT SYSTEMS:..26 INTRODUCTION:..26 UNIFORM FREQUENCY RESPONSE:..26 SMOOTHING OUT THE FREQUENCY RESPONSE:..27 ONE OCTAVE ANALYZERS AND EQUALIZERS:..28 ONE-THIRD OCTAVE ANALYZERS AND EQUALIZERS:..28 USING THE SPECTRUM ANALYZER.

7 28 WHAT IS PINK NOISE?:..28 MEASURING THE HOUSE SYSTEM:..30 DIRECT AND REFLECTED SOUND:..30 LARGE ROOMS OR HALLS:..30 SMALL ROOMS:..31 USE THE RIGHT ANALYZER AND EQUALIZER COMBINATION:..32 IF YOU ARE USING BI-AMPLIFIED OR TRI-AMPLIFIED SPEAKER SYSTEMS:..33 MEASURING THE MONITOR SYSTEM:..35 SYSTEMS WITH ONLY ONE MONITOR SPEAKER:..35 SYSTEMS WITH MULTIPLE MONITOR SPEAKERS:..35 FEEDBACK SUPPRESSION:..36 39. GENERAL ANALYSIS AND EQUALIZATION PROCEDURES:..36 KEEP IN MIND:..37 40. MEASURING AND EQUALIZING THE HOUSE SYSTEM:..37 41. MEASURING AND EQUALIZING THE MONITOR SYSTEM.

8 38 ADJUSTING MONITORS FOR FLAT FREQUENCY RESPONSE:..38 ADJUSTING MONITORS FOR MAXIMUM LEVEL ( FEEDBACK SUPPRESSION):..38 42. OPTION STICIS - DSP30B/BP:..40 INTELLIGIBILITY METER OPTION FOR THE DSP30B/BP ANALYZER:..40 STAND ALONE USE (USING DSP30B/BP WITHOUT PC):..40 ivSTORING AMBIENT AND TEST DATA:..41 TO RECALL STI/CIS or AMBIENT NOISE MEASUREMENTS IN DSP30B/BP:..42 USING THE WINDOWS SOFTWARE WITH THE DSP30B/BP:..43 TO RECALL A MEMORY PREVIOUSLY SAVED TO THE DSP30B/BP:..43 TO ADD NOISE (Requires PC):..44 THE NOISE CORRECTION PROCEDURE:..44 OCCUPIED NOISE WITHOUT A MEASUREMENT.

9 45 EVALUATING THE RESULTS:..45 43. THE PRIVACY INDEX (PI):..46 WORKING WITH INTELLIGIBILITY AND PRIVACY INDEX ISSUES:..46 COMPARING STI AND PI CONVERSIONS:..46 AVAILABLE PRODUCTS TO MEASURE INTELLIGIBILITY AND PRIVACY:..47 PRIVACY INDEX TESTING - STAND ALONE USE (USING DSP30BP WITHOUT PC):..47 TO STORE PI MEASUREMENTS IN DSP30BP:..48 TO RECALL PI MEASUREMENTS IN DSP30BP:..48 TO TRANSFER AND RECALL PI MEASUREMENTS (USING DSP30BP WITH A PC):..48 44. 1 user S Manual DSP30, DSPCIW & DSP30RM DIGITAL 1/3 OCTAVE REAL TIME SPECTRUM ANALYZERS 1. INTRODUCTION: The GOLD LINE DSP ANALYZERS have digital features that greatly increase the usefulness and cost effectiveness of audio measurements.

10 These analyzers feature a SOUND WINDOW that is large enough to capture the dynamic response of a room (85dB) and are capable of detailed measurements with great accuracy. The system makes use of software-controlled filters allowing measurements over a wider dynamic range without interference from adjacent frequencies. The user is also able to change the character of the filters from standard ANSI CLASS III triple tuned filters to filters with sharper skirts (better than CLASS III). These sharper filters allow the user to measure over a larger dynamic range without interference from adjoining frequencies.