User manual PHONIC MM1002

[. . . ] Keep these instructions for future reference. Heed all warnings to ensure safe operation. Follow all instructions provided in this document. Do not use this apparatus near water or in locations where condensation may occur. [. . . ] The default readout is the ALL FREQUENCY level. Procedure: 1. Enter the SPL/LINE menu and set the measurement unit to SPL. You may select a range level, weighting, response time or a maximum level by going into the SETTINGS menu, then onto the appropriate menus. The selected values of these options will be displayed above the RTA on the MM1002's default screen. page 10 MM1002 User's Manual PHONIC CORPORATION 3. On the main RTA display, hold the ENTER button for approximately 2 seconds to activate the SPL screen. You can easily refresh the Max SPL value by holding both the left and right keys simultaneously for at least one second. RT60 (Reverb Time Analyzing) The RT60 function of the MM1002 is easy enough to understand: it is basically the time it takes for a signal to drop 60 dB. Getting the average of many different RT60 calculations from around a room allows users to get an idea as to how much absorption or reflection of audio the room provides. Depending on your needs, you may wish to have a high or low RT60 measurement. For example, for public speaking, an RT60 measurement of less than 1 second is preferable, as to have a clear, concise voice conveyed to the audience. With choirs or instrumental music, an RT60 measurement of greater than 1. 5 seconds may be appropriate. It all depends on your needs. Measuring Reverb Time: 1. Go to the SETTING menu, where you may want to adjust the RANGE, WEIGHTING, RESP TIME (response time), or MAX LEVEL of your measurement. Here you can read the level of any or all frequencies. If all frequency readouts are needed, press "ENTER" button (or the jog control) for two seconds to enter line level meter. page 12 MM1002 User's Manual PHONIC CORPORATION Level Meter Measure the line voltage level in units of dBu, dBV, and AC voltage, using standard response time, and standard A, C, or flat weightings (under normal conditions, flat is preferable). Using the MM1002 to meaure DC voltage may damage the MM1002 and will void the warranty. MEMORY The sub-menus of MEMORY include: STORE, RECALL, AVERAGE, EQ SETTING. Through these options, users are able to store their RTA measurements. Store The user can save up to 10 sets of measured data (1 to 10), as well as 6 averaged sets (A to F), into the memory of the MM1002, allowing them to be used later for further analysis or uploading to your computer. MEMORY MEMORY STORE 9 1 YES 5 RECALL SETTING 2 NO TEST AVERAGE 10 CABLE 6 4 ESC8 POWER OFF Procedure: 3 7 ESC 1. Enter the SPL / LINE menu and set the measurement unit to dBu, dBV, or voltage, as required. You may select a range level, weighting, response time or a maximum level by going into the SETTINGS menu, then onto the appropriate menus. The selected values of these options will be displayed above the RTA on the MM1002's default screen. On the main RTA display, hold the ENTER button for approximately 2 seconds to activate the Level Meter screen. You can easily refresh the Max SPL value by holding both the left and right keys simultaneously for at least one second. ATTENTION: If the level is lower than 127 mV when measuring voltage, the MM1002 will show it in mV. If the level is higher than 127mV, the data will be shown in voltage For example, 120mV will read as 120. 0mV, and 200mV will be shown as 0. 2V. [. . . ] Here lists all stored memories of the MM1002, downloaded to the computer. The two tabs allow users to view either the RTA memories or RT60 memories stored. Backlight: The backlight button to the right-hand-side of the MM1002 program will allow users to remotely active the MM1002's backlight. PHONIC CORPORATION MM1002 User's Manual page 19 MM1002 OFF LINE The following functions can actually be accessed while in either on line or off line modes, unless indicated otherwise. MEMORY Select one of the memory slots (1 to 10 or A to F) in the RTA section of the memory chart at the bottom of the MM1002 software window to view the properties of saved data. Users can click on the bar-meter in the spectrum to see a specific frequency for readout or view them in the RTA Value column. ATTENTION: User may rename every memory by double clicking the number of the memory in the memory chart. Printing: 1. [. . . ]