PCE Americas PCE-428 User Manual Download Page 26

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3.3 Screen of 1/1 Octave Mode

1/1 Octave Spectra. Display 12 bands

of 8Hz~16kHz and L

Aeq

, L

Beq

, L

Ceq

, L

Zeq

as bar graph. Press

<▲>

<▼>

display the detail value of each band. A

threshold can be set for each band. The

LED indicator will turn red when the

data exceed the threshold.

Octave Table Page 1. Display the

measurement data of 8Hz~16kHz. The

LED indicator will turn red and dB value

will display as invert color when the data

exceed the threshold.

Octave Table Page 2. Display the

measurement data of L

Aeq

、

Beq

、

Ceq

、

Zeq

. The LED indicator will turn red and

will be display when the data

exceed the threshold.

3.4 Screen of 1/3 Octave Mode

1/3 Octave Spectra. Display 36 bands

of 6.3Hz~20kHz and L

Aeq

, L

Beq

, L

Ceq

Zeq

as bar graph. Press

<▲>

<▼>

display the detail value of each band. A

threshold can be set for each band. The

LED indicator will turn red when the

data exceed the threshold.

PCE-428 / 430 / 432

Summary of Contents for PCE-428

Page 1: ...outside US 1 Tel 561 320 9162 Fax 561 320 9176 info pce americas com www pce instruments com english www pce instruments com PCE Instruments UK Ltd Units 12 13 Southpoint Business Park Ensign way Hampshire Southampton United Kingdom SO31 4RF From outside UK 44 Tel 0 2380 98703 0 Fax 0 2380 98703 9 info industrial needs com ...

Page 2: ...n for Periodic Tests 12 1 7 Key Component 13 1 8 Packing List 13 1 9 Packing Drawing 14 2 The Appearance and Operation 19 2 1 Keypad 19 2 2 Microphone Connector 20 2 3 Windscreen 21 2 4 Data and Power Supply Connector 22 2 5 Battery 23 2 6 GPS 24 3 Measurement Screen 26 3 1 Icons and Meaning of Screen Display 26 3 2 Screen of Level Meter Mode 28 3 3 Screen of 1 1 Octave Mode 30 PCE 428 430 432 ...

Page 3: ...ent 34 4 3 Measurement 36 4 3 1 MEAS Setup 36 4 3 2 MEAS Range 38 4 3 3 ICCP Power 39 4 3 4 Profile 1 3 39 4 3 5 Alarm Threshold 40 4 3 6 Extended Function 40 4 3 7 Statistical 40 4 3 8 Time History 41 4 3 9 Octave 41 4 3 10 Custom Measure 41 4 3 11 Timer 42 4 3 12 24h Measurement by Timer 43 4 4 Setup 44 4 4 1 Contrast 44 4 4 2 Backlight 44 4 4 3 Battery 44 4 4 4 Trigger 45 4 4 5 Date Time 45 4 4...

Page 4: ...ansfer Protocol 55 5 2 1 Start Stop of the Block Transfer 56 5 2 2 Device ID 56 5 2 3 ATTR Attribute Character 56 5 2 4 BCC Block Check Character 57 5 2 5 Block Transfer Format 57 5 2 6 Recovery from Transmission Errors 58 5 2 7 Flow Control 59 5 2 8 Multi Machine Operation 59 5 2 9 Rated Parameters 60 5 3 Instruction 60 5 3 1 Instruction List 62 5 3 2 Instruction Format 65 5 3 3 Instruction Descr...

Page 5: ...l Effects of Reflections from the Case of Sound Level Meter and Diffraction of Sound around the Microphone 108 Annex 4 Corrections of Windscreen in Free Field 109 Annex 5 Corrections of Electrostatic Actuator 110 Annex 6 Typical Frequency Response and Corresponding Upper Limit 111 Annex 7 Specification of 1 1 Octave Band Filter 112 Annex 8 Specification of 1 3 Octave Band Filter 113 Annex 9 Mid ba...

Page 6: ...Appearance PCE 428 430 432 ...

Page 7: ...7 Buttons of Operation LED indicator Power LCD Screen ESC Enter Arrow keys Menu Start Stop Backlight PCE 428 430 432 ...

Page 8: ...noise floor and linear range of product The new developed algorithm brings a single measurement range which can cover more than 120dB dynamic range while still meets the standard PCE 430 432 is Class 1 and PCE 428 is Class 2 Both instruments have certificated by the China CPA Certification of Pattern Approval and CMC China Metrology Certification 1 2 Applications Basic noise measurement Environmen...

Page 9: ...upport auto measurement 0 1s 0 2s 0 5s logger step added Internal GPS option with GPS timing 5 templates to save user setting Single range to cover 123dB dynamic range B weighting added to for ANSI standard Reduce the noise floor only for Class 1 Automatic power on with external supply ease of integration Upper limit of measurement 136dBrms 139dBpeak 40mV Pa 1 5 Spectification Specifications Type ...

Page 10: ...ting F S I N is the statistical percentage 1 99 3 Profile and 14 custom define measurement are calculate in parallel with different frequency time weighting 24h Measurement Automatic measurement based on user define date time and save the history data Frequency Weighting Parallel A B C Z It can also be applied to 1 1 and 1 3 Octave Time Weighting Parallel F S I and Peak detection Self Noise2 Sound...

Page 11: ...C Output 10mV dB max 15mA RS 232 serial interface and USB USB disk mode or modem mode Alarm User define alarm threshold LED indicate the alarm status Setup Template 5 templates to save user setup for different application template can be save in MicroSD card Auto Power On Automatic power on and start measurement when power supply available ease of integration Power Supply 4x1 5V alkaline batteries...

Page 12: ...al or dot matrix printer RS 232 port Note 1 Ignore the result outside 20Hz 12 5kHz for type PCE 428 alone due to microphone frequency response of Class 2 Note 2 The data was measured with 40mV Pa microphone for PCE 430 432 and PCE 428 Note 3 Measurement according to GB T 3785 and IEC 61672 Note 4 Measurement according to GB T 3241 and IEC 61260 1 6 Information for Periodic Tests Reference sound le...

Page 13: ...AM3 x 4 8 Power Adapter Power adapter with 9V 500mA 9 MiniUSB Cable Use to connect computer 10 Quick Start Guide Quick start guide 11 Certificate of Calibration Certificate of factory calibration 12 CD Include post process software user manual pdf driver firmware and other utility 13 Certificate of Conformity Certificate of conformity Option 14 GPS GPS module and antenna 15 Sound Calibrator CA111 ...

Page 14: ...14 1 9 Packing Drawing Note The detail of packing items may vary to follow orders PCE 428 430 432 ...

Page 15: ... press 2 seconds will trigger the shut down dialog box and then press Enter to power off sound level meter Note Enter is invalid when the sound level meter is running measurement ESC Exit the menu or return to previous menu Press ESC also can clear the history curve at the time history screen Enter Enter the menu of next level or confirm the changes of the parameters or save current data as CSD fo...

Page 16: ... The TNC connector on the top of the sound level meter is used to connect to microphone and preamplifier microphone and preamplifier are usually mounted together The TNC is threaded coaxial connector PCE 430 432 is equipped with Class 1 microphone while PCE 428 is equipped with Class 2 MPA231T 1 2 pre polarized measurement microphone class 1 Sensitivity 40mV Pa Frequency range 3Hz 20kHz Mounted wi...

Page 17: ...V It will damage the microphone if voltage over 30V PCE 428 430 432 sound level meter has internal ICCP power which can connect to microphone directly Insert microphone to TNC connector Then rotate the thread until the connection is tight 2 3 Windscreen Sound level meter equipped with WS002 9 windscreen for use in windy outdoor environments No need to use windscreen when used in a windless environ...

Page 18: ...roSD card can be access directly at this mode no need to install driver Computer can recognize the MiniUSB as serial port virtual serial port need to install driver and communicate with sound level meter by RS 232 protocol refer to 5 RS 232 Communication Protocol to earn more detail Note At least 1A power current capacity must be meet for power supply and cable cable with ferrite core is not recom...

Page 19: ... 2 5 Battery Recommend to use 4 cell of alkaline battery LR6 AA AM3 paying attention to the battery polarity marked in the battery compartment Do not mix using of old and new batteries at the same time Remove batteries when the device is not in use The total voltage of 4 cell battery cannot exceed 14V otherwise it will damage the sound level meter The real test shows that the 4 cell of alkaline ba...

Page 20: ...2 6 GPS GPS antenna cover located on the top surface of sound level meter which select GPS function as option module Note GPS function must be select before delivery to user due to install GPS module should return the sound level meter to factory GPS performance is mainly affected by two factors the satellite ephemeris and the satellite signal noise ratio PCE 428 430 432 ...

Page 21: ...ephemeris data in memory for approx 30 minute after turn off GPS module The ephemeris data is only is valid within 2 hours Satellite Signal Noise Ratio Satellite positioning signal intensity In rainy days or indoor signal strength will be affected GPS have 3 boot modes Cold start warm start and hot start Cold Start First location need to download the latest ephemeris and longer time Warm Start GPS...

Page 22: ...s Octave Histogram Octave Table Page 1 4 GPS Page 1 and GPS Page 2 3 1 Icons and Meaning of Screen Display All icons of Main screen is enable the meaning of each icons are describe as following Start Stop Describe the measurement state Overload indicator and under range indicator Solid arrow indicates that the current state is overload under range Hollow arrow indicates that overload under range e...

Page 23: ...lation mode of measurement Filter state Detector state Icon of Profile Indicate the profile number of current display Measurement value Visualize and dynamic bar graph display of measurement values within the current range Date and time Current page number and total page number Internal temperature display Icon means the integral period icon means the elapsed time The measurement stop when elapsed...

Page 24: ...urement at the same time 3 Profile data can be saved into SWN file LN Statistical Display 10 groups of statistical results Each group of data sources fix mode to SPL filter and detector can be customize and the percentage value can be set through the menu Time History Display the current noise value and time domain curve The data sources one of 3 Profile and the time line length 1min 2min and 10mi...

Page 25: ...een can display the last 7 sets GPS Page 1 Display GPS information GPS state GPS date GPS time latitude longitude altitude and speed GPS Page 2 Display number of satellite which contribute to positioning and signal noise ratio of all visible satellites 0dB 99dB Note Number of visible satellites may be greater than the number of positioning satellites due to some satellites is unavailable for posit...

Page 26: ...ndicator will turn red and dB value will display as invert color when the data exceed the threshold Octave Table Page 2 Display the measurement data of LAeq LBeq LCeq LZeq The LED indicator will turn red and will be display when the data exceed the threshold 3 4 Screen of 1 3 Octave Mode 1 3 Octave Spectra Display 36 bands of 6 3Hz 20kHz and LAeq LBeq LCeq LZeq as bar graph Press to display the de...

Page 27: ... indicator will turn red and dB value will display as invert color when the data exceed the threshold Octave Table Page 3 Display the measurement data of 1 6kHz 20kHz The LED indicator will turn red and dB value will display as invert color when the data exceed the threshold Octave Table Page 4 Display the measurement data of LAeq LBeq LCeq LZeq The LED indicator will turn red and will be display ...

Page 28: ...t can be set in the menu Menu Tree 4 1 Function Select Function and press Enter to enter this menu 3 kind of measurement can be select Level Meter 1 1 Octave and 1 3 Octave Press can select mode of measurement Press Enter to save setting and return to previous menu Press ESC to return to previous menu PCE 428 430 432 ...

Page 29: ...B 199 9dB Press and can change the Cal Level and press Start to start calibration After calibration finished the new Cal Factor will be update as the result and user can press Enter or ESC to save or ignore this result This menu also displays the calibration history Ending with symbol M indicate the record was calibrate by the method of By Measurement 4 2 2 Calibration by Cal Factor Select By Cal ...

Page 30: ... is different for each sound level meter 4 2 4 Process of Calibration by Measurement Calibration by measurement is the recommend method of calibration with sound calibrator PCE 428 430 432 can provide class 1 and class 2 sound calibrator comply with the GB T 15173 2010 IEC60942 2003 standard The process of calibration by measurement is shown as following 1 Insert the microphone into the cavity of ...

Page 31: ...e is 5s delay after press Start to run calibration 5 After the end of calibration sound level meter will update the calibration factor Press Enter to apply the results 6 Return to Main screen and press Start Stop to start the measurement The current measurement result will be 93 8dB in this example if calibrator is still working PCE 428 430 432 ...

Page 32: ...0s The delay time can skip the impact come from the key pressing or vibration before the measurement Itg Period Itg Period is the integral period of each single measurement At the beginning of each integral period all of the integral data and time hold data will be reset and the overload and under range indicator will be clear Integral data and time hold data include LEQ Max Min Peak SD SEL E and ...

Page 33: ...ore as CSD file in 1 1 Octave mode save all bands of octave and LAeq LBeq LCeq LZeq store as CSD file Note If selected press Enter at the main screen can save the data into CSD file manually when measurement is stop CSD Log Step CSD Log Step is the logger step interval time to save data as CSD file Press can select the option 1s 59s 1m 59m 1h 24h Profile1 Profile2 Profile3 SWN File 14 sets of Cust...

Page 34: ...when the result located in the linearity range Otherwise the error of measurement result is over the acceptance limits Sometimes linearity range also can be called measurement range Dynamic Range Dynamic range is the range between the self generated noise level and the maximum input signal level Dynamic range is the maximum range which can be display on the sound level meter Note the measurement r...

Page 35: ...r Set the filter of Profile 1 3 Press can select the option A B C and Z Z weighting means no weighting and sometimes it is called Flat or Linear Detector Set the detector of Profile 1 3 Press can select the option Fast Slow and Imp Mode Set the integral mode of Profile 1 3 Press can select the option SPL PEAK LEQ MAX and MIN SWN Save This option is used to set which data should be store in the SWN...

Page 36: ... is designed to be displayed all the time 4 3 7 Statistical The data source of statistical is SPL which is fixed User can t change it But user can set the filter and detector of SPL and the statistical percentage value through this menu Mode It s fixed to SPL and cannot be changed Filter Press can set the filter of statistical analysis A B C and Z Flat Detector Press can set the detector of statis...

Page 37: ...line of time history 1min 2min 10min 4 3 9 Octave Menu of Octave can set filter and detector before octave calculation and the alarm threshold of each octave band LA LB LC LZ If the measurement result exceeds the threshold the LED indicator will turn red Press can set the option to 0 1dB 199 9dB 4 3 10 Custom Measure There are 14 items in menu of Custom Measure which can set the parameters of grou...

Page 38: ...A new function named Timer was introduced to start measurement by program User can set the measurement start from 00 00 of next day measure several minutes and repeat each hour in order to achieve 24h auto measurement Timer Press can set Timer working mode OFF Once and Loop Start Day Press can set Timer trigger date Ignore and the certain day in the future 30 days If select Ignore the Timer will i...

Page 39: ...urement will be first start at 2015 3 14 00 00 measure first 5m of each hour It will store CSD file when the stop measurement and store SWN file every second Delay setting in the MEAS Setup will be ignored if the measurement is triggered by Timer Set Itg Period as 5m and set Repeat as 1 Enable the SWN Logger and CSD Logger Set the SWN Log Step to 1s and set the CSD Log Step to 5min Set the Timer w...

Page 40: ...ter provide the auto turn off function of backlight to reduce the power consume and extend battery life Menu of Backlight can set the backlight timeout on off and delay time Press can choose and select 4 4 3 Battery Menu of Battery display the power state and power voltage The discharge cut off voltage of single cell LR6 AA AM3 alkaline battery is approx 0 9V therefore sound level meter will power...

Page 41: ...tor Short the signal lines and ground to trigger measurement to start otherwise to stop the measurement Notice that when enable the Trigger function the Start Stop button is unavailable 4 4 5 Date Time Menu of Date Time can set the RTC time of sound level meter Press can choose and select Press can select date format and turn to date setting Press can choose year month and day press can modify the...

Page 42: ... the surface of PCB as the following figure The model of battery is CR 1220 Note The RTC of sound level meter has calibrated to a reference clock with average error 2ppm maximum error 3ppm The time accuracy keep 10ppm 26s within 30 days at room temperature The maximum time error is approx 5s 8s at 25 in internal test The RTC accuracy may vary by the temperature due to no temperature compensation A...

Page 43: ...while it will power off base on the setting The Auto PWR Off option 1min 5min 10min 30min Off Press can choose and select press Enter to save the setting 4 4 7 RS 232 Menu of RS 232 can set the option of serial port refer to 5 RS 232 Communication Protocol to earn more detail RS 232 Mode RS 232 Mode option Remote Printer Press can choose Sound level meter can be control and send out data via RS 23...

Page 44: ...AK the option is ON OFF Press can choose and select 4 4 8 File Manager File Manager can manage the stored SWN OCT and CSD file The numbers display at the right side of each line is the file count for each kind of file type Press can choose and select press Enter to access next level of menu Menu of SWN File can delate SWN files press to select the file number which want to be delete The whole file...

Page 45: ...e contents at View mode The Print mode is almost same to View mode Press Enter can print the current displayed content of CSD file 4 4 9 Boot Mode In menu of Boot Mode press can select Normal Power Boot Boot Auto Meas mode Note The hardware mode switch located in the battery compartment need to be set to fit to different boot mode Normal Need to change hardware mode switch to Normal This is the no...

Page 46: ... measurement automatically from power failure Hardware Mode Switch The hardware mode switch located in the battery compartment It s easily to be found after remove the batteries Please select the switch to Boot or Normal by nib or tweezers Note Static electricity sensitive area Eliminate static electricity before operation 4 4 10 USB Mode Menu of USB Mode can set the working mode when connect soun...

Page 47: ... 4 11 GPS Menu of GPS can set the GPS and Auto Time Sync on off When GPS is turn off the internal GPS module is shutdown If enable Auto Time Sync the RTC of sound level meter will be synchronized when get GPS time and then keep synchronization once per hour 4 4 12 Setup Template The Setup Template is used to store 5 group user setting parameter of sound level meter for different application Note T...

Page 48: ...also be include in this menu Press can choose and select 4 6 1 AC OUT There are two analog output ports on sound level meter DC OUT and AC OUT Please use coaxial cable to connect DC OUT AC OUT to other device or system Recommend input resistance of terminal device or system should above 5kΩ AC OUT port is located on the bottom of sound level meter It output the signal of microphone directly withou...

Page 49: ...l meter mode Press can choose and select Filter A B C Z Flat Detector Fast Slow Imp Mode SPL LEQ Peak Octave DC Out can set the signal output of octave mode The option is LAeq LBeq LCeq LZeq and 6 3Hz 20kHz Press can choose and select If select unavailable band for current function it will display Invalid Octave Band 4 6 3 Printer Print Option can set the printer option to Auto or Manual Select Au...

Page 50: ...ory Settings provides the function for reset all the parameters which has been modify by users The parameters will be initialized to the default value Press can select Y Yes or N No Choose Y and pressing Enter will initialize the parameter Choose N or press ESC will cancel the reset PCE 428 430 432 ...

Page 51: ...al socket is PS 2 6 pins Below is the definition of RS 232 interface RS 232 transfer settings Transfer Mode Full duplex Synchronous Asynchronous Mode Asynchronous transfer Baudrate 4800 bps 9600 bps 19200 bps Data Bits 8 bit Stop Bits 1 bit Parity None Flow Control Follow the time data in the rated parameters table Note RS 232 connector housing should be grounded and recommended to use ground shie...

Page 52: ...ed in the command block and its own ID If matched the corresponding operation will be performed If not then ignore this command The response block returned from the sound level meter also contains the ID which is used to indicate that the block is sent by which one Note Please ensure that the ID of sound level meter in the same network are different from each other otherwise the error will occur d...

Page 53: ...he instruction block but do not recommend this way for long distance applications because the BCC is the only way to guarantee reliability of data transmission Name Hex Meaning BCC 01H FFH XOR Checksum 00H Ignore the Checksum 5 2 5 Block Transfer Format Block transfer of data have four types command block response block normal response block and error response block The following were to describe ...

Page 54: ...esponse block The following describe how the sound level meter will deal with and restore to the initial state when an error occurs 1 Block Transfer Not Complete Section 5 2 5 describes the 4 kinds of block transmission format When the sound level meter receives the beginning of a block of characters STX it will continue to receive the remaining data until the end of the block CR LF When the data ...

Page 55: ...ta in octave mode 2 Be request to perform the calibration operation when running the measurement 3 Be request to change the measurement parameters or system parameters when running the measurement When the above error occurs the sound level meter will return NAK block which contains the error code 0003H 5 2 7 Flow Control The sound level meter uses three wire serial interface by P S2 6 pin socket ...

Page 56: ...h byte for sound level meter to receive Unlimited Means that the sending speed of the computer could be very slow 5 3 Instruction The instruction has two types set instructions and query instructions Set Instructions Set the measurement parameters and system parameters of sound level meter Query Instructions Query the parameters and data of the sound level meter There are 3 kind of situation for s...

Page 57: ...ter Set Instruction Sound Level Meter Return NAK 3 Query command Normal response Computer Query Instruction Sound Level Meter Return Data Error response Computer Query Instruction Sound Level Meter Return NAK PCE 428 430 432 ...

Page 58: ...Level and Calibration Factor 71 CAFp1 Calibrate by Calibration Factor 71 CAF Query Calibration History 71 BSEp1_p2_p3_p4_p5_p6_p7 Measurement Setup 72 BSE Query Measurement Setup 73 RNS Query Measurement Range 73 ICPp1 Set ICCP Power 74 ICP Query ICCP Power State 74 PR1p1_p2_p3_p4 Set Profile1 74 PR1 Query Profile1 Setting 75 PR2p1_p2_p3_p4 Set Profile2 75 PR2 Query Profile2 Setting 75 PR3p1_p2_p3...

Page 59: ...p1 Set Contrast 83 CON Query Contrast Setting 83 BLTp1_p2 Set Backlight 84 BLT Query Backlight Setting 84 BAT Query Battery State 84 TRGp1 Set Trigger 85 TRG Query Trigger Setting 85 DATp1_p2_p3_p4 Set Date 86 DAT Query Date Setting 86 HORp1_p2_p3 Set Time 86 HOR Query Time Setting 87 PWOp1 Set Auto Power Off 87 PWO Query Auto Power Off Setting 87 OPMp1 Set Boot Mode 88 OPM Query Boot Mode Setting...

Page 60: ...p1 Start Stop Measurement 92 STA Query Measurement State 93 DMAp1_ Query the Main Screen Data 93 TPRp1_ Query 3 Profile Screen Data 94 DLNp1_ Query Statistical Analysis Data LN 94 DCU Query Custom Measure Data 95 DSLp1_p2_ Query All the Data of the Sound Level Meter 96 DOT Query Octave Data 97 CSD Save Custom Data into MicroSD 98 PCE 428 430 432 ...

Page 61: ... both of 93 and 124 are single parameter So the individual numbers don t need to be separated by spaces 1_64 2 individual parameters 1 and 64 Note that 1 and 64 are two parameters in one instruction So those parameters need to be separated by space The parameter is possible to be decimal or integer type However if the actual value is integer type decimal point and decimal bits can be omitted 2 Sep...

Page 62: ...nd level meter ACK signal will be returned with the new ID Instruction Parameters Explanation IDX p1 ID number Range 1 255 Default 1 ASCII I D X 1 Hex 49H 44H 58H 31H Byte 1 1 1 1 3 Return ACK NAK Example 1 set the ID as 3 02 01 43 49 44 58 33 03 25 0D 0A Return ACK Note where ID has been changed to 3 03H 02 03 06 03 040D 0A Example 2 set the ID as 255 02 01 43 49 44 58 32 35 35 03 24 0D 0A Return...

Page 63: ...2 baud rate 2 4800bps 3 9600bps 4 19200bps Default 3 ASCII B R T 3 Hex 42H 52H 54H 33H Byte 1 1 1 1 Return ACK NAK Example set the baud rate to 9600bps 02 01 43 42 52 54 33 03 34 0D 0A Return ACK 02 01 06 03 06 0D 0A BRT Query The RS 232 Baud Rate Setting Instruction Parameters Explanation BRT Query parameter ASCII B R T Hex 42H 52H 54H 3FH Byte 1 1 1 1 Return Return the current baud rate Example ...

Page 64: ...query flow control mode 02 01 43 58 4F 4E 3F 03 25 0D 0A Return the current flow control mode is software flow control 02 01 41 31 03 70 0D 0A RETp1 Set Response Mode Response means the ACK NAK signal returned from the sound level meter HIS and OCS instruction returns MicroSD card state or NAK User can enable or disable such a response Note RET instruction itself is not affected by response mode W...

Page 65: ...3F 0D 0A Return the current response mode is to enable the response 02 01 41 31 03 70 0D 0A MEMp1 Set the Measurement Mode When MEM instruction is correctly received by the sound level meter it will switch to the main screen of the octave mode or the main screen of level meter mode according to the corresponding parameter in instruction Note The 1 3 octave band is optional function Instruction Par...

Page 66: ...ved by the sound level meter two ACK will be returned at the beginning and the end of the calibration several seconds will be spent by the calibration In the calibration history ending with symbol M indicate the record was calibrate by the method of by Measurement Instruction Parameters Explanation CAL p1 Calibration level Range 0 199 9 Default 93 8 ASCII C A L 93 8 Hex 43H 41H 4CH 39H 33H 2EH 38H...

Page 67: ...l is 094 0dB the calibration factor is 000 00dB 02 01 41 30 39 34 2E 30 2C 2B 30 30 30 2E 30 30 03 7B 0D 0A CAFp1 Calibrate by Calibration Factor This instruction can modify the calibration factor In the calibration history code F at the end of each line means by calibration factor Instruction Parameters Explanation CAF p1 Calibration factor Range 199 99 199 99 sign can be omitted Default 0 ASCII ...

Page 68: ... 38 2F 30 34 2C 31 37 3A 30 33 3A 30 32 2C 2B 30 30 31 2E 32 35 2C 46 2C 32 30 31 31 2F 30 38 2F 30 34 2C 31 37 3A 30 32 3A 32 30 2C 2B 30 30 30 2E 37 31 2C 46 2C 32 30 31 31 2F 30 38 2F 30 34 2C 31 37 3A 30 32 3A 30 30 2C 2B 30 30 31 2E 32 37 2C 4D 03 62 0D 0A BSEp1_p2_p3_p4_p5_p6_p7 Measurement Setup Set the delay integral period repeat and logger setup Instructi on P1 P2 P3 P4 P5 P6 P7 Explanat...

Page 69: ...ASCII B S E Hex 42H 53H 45H 3FH Byte 1 1 1 1 Return Return parameter of measurement setup delay integral period repeat SWN logger SWN logger step CSD Logger CSD Logger step Example query the measurement setup 02 01 43 42 53 45 3F 03 28 0D 0A Returns the current measurement setup delay 2s integral period 5min repeat infinite SWN logger enable SWN logger step 0 2s CSD logger enable CSD logger step 2...

Page 70: ...1 43 49 43 50 30 03 29 0D 0A Return ACK 02 01 06 03 06 0D 0A ICP Query ICCP Power State Instruction Parameters Explanation ICP Query parameter ASCII I C P Hex 49H 43H 50H 3FH Byte 1 1 1 1 Return Return ICCP power state Example query ICCP power state 02 01 43 49 43 50 3F 03 26 0D 0A Return ICCP power is enable 02 01 41 30 03 71 0D 0A PR1p1_p2_p3_p4 Set Profile1 Instruction P1 P2 P3 P4 Explanation P...

Page 71: ...31H 3FH Byte 1 1 1 1 Return Return Profile1 setting Example query Profile1 setting 02 01 43 50 52 31 3F 03 4F 0D 0A Return current Profile1 setting is A Fast SPL save LEQ 02 01 41 30 2C 30 2C 30 2C 30 03 6D 0D 0A PR2p1_p2_p3_p4 Set Profile2 Except the instruction is PR2 and the default filter is 2 C weighting all others are same to the PR1 PR2 Query Profile2 Setting Except the instruction is PR2 a...

Page 72: ...tion Parameters Explanation ALM Query parameter ASCII A L M Hex 41H 4CH 4DH 3FH Byte 1 1 1 1 Return Return alarm threshold Example query alarm threshold 02 01 43 41 4C 4D 3F 03 3C 0D 0A Return the current alarm threshold is 100dB 02 01 41 31 30 30 03 70 0D 0A ETFp1_p2_p3_p4_p5 Set Extended Function Instruction P1 P2 P3 P4 P5 Explanation ETF p1 3Profile Screen 0 Disable 1 Enable p2 Statistical Scre...

Page 73: ...54 46 3F 03 2B 0D 0A Return 3Profile statistical time history custom and GPS are all enable 02 01 41 31 2C 31 2C 31 2C 31 2C 31 03 70 0D 0A STSp1_p2_p3 p11_p12 Set Statistical Instruction P1 P2 P3 P12 Explanation STS p1 Filter 0 A 1 B 2 C 3 Z Default 0 p2 Detector 0 F 1 S 2 I Default 0 p3 p12 statistical percentage Range 1 99 Default 10 20 30 40 50 60 70 80 90 99 ASCII S T S 0 0 10_20_30_40_50_ 60...

Page 74: ...xample query statistical 02 01 43 53 54 53 3F 03 28 0D 0A Return filter B detector I percentage 10 20 30 40 50 60 70 80 90 99 02 01 41 31 2C 32 2C 31 30 2C 32 30 2C 33 30 2C 34 30 2C 35 30 2C 36 30 2C 37 30 2C 38 30 2C 39 30 2C 39 39 03 6F 0D 0A HISp1_p2 Set Time History Instruction Parameters 1 Parameters 2 Explanation HIS p1 Profile 0 Profile1 1 Profile2 2 Profile3 Default 1 p2 Duration 0 1min 1...

Page 75: ...41 The threshold of LeqA LeqB LeqC LeqZ 6 3Hz 20kHz Range 0 199 9 Default 31 5Hz 79 63Hz 63 125Hz 52 250Hz 44 others 38 ASCII O C S 1 38_38_38_38_38_38_38_38_38_38_38_79 _38_38_63_38_38_52_38_38_44_38_38_3 8_38_38_38_38_38_38_38_38_38_38_38_ 38_38_38_38_38 Hex 4FH 43H 53H 31H 33H 38H 20H 33H 38H 20H 33H 38H 20H 33H 38H 20H 33H 38H 20H 33H 38H 20H 33H 38H 20H 33H 38H 20H 33H 38H 20H 33H 38H 20H 33H...

Page 76: ... 03 23 0D 0A Returns return Filter and threshold of LeqA LeqB LeqC LeqZ 6 3Hz 20kHz For example Filter is C weighting threshold are LeqA 038 1 LeqB 038 2 LeqC 038 3 LeqZ 038 4 6 3Hz 038 1 8Hz 038 2 10Hz 038 3 12 5Hz 038 4 16Hz 038 5 20Hz 038 6 25Hz 038 7 31 5Hz 038 8 40Hz 038 9 50Hz 038 1 63Hz 063 2 80Hz 038 3 100Hz 038 4 125Hz 052 5 160Hz 038 6 200Hz 038 7 250Hz 044 8 315Hz 038 9 400Hz 038 1 500H...

Page 77: ...3 Z p3 Detector 0 Fast 1 Slow 2 Imp p4 Mode 0 SPL 1 SD 2 SEL 3 E 4 Max 5 Min 6 Peak 7 LEQ 8 LN1 17 LN10 ASCII C U S 1 0 0 0 Hex 43H 55H 53H 31H 30H 30H 30H Byte 1 1 1 1 2 1 1 1 2 Return ACK NAK Example set custom measurement of group 1 to B weighting Fast Peak 02 01 43 43 55 53 31 20 31 20 30 20 36 03 20 0D 0A Return ACK 02 01 06 03 06 0D 0A Default value of each group in custom measurement parame...

Page 78: ... of group 12 02 01 43 43 55 53 31 32 20 3F 03 1A 0D 0A Return the setting of group 12 is A weighting Fast E 02 01 41 31 32 2C 30 2C 30 2C 30 33 03 6D 0D 0A TISp1_p2_p3_p4_p5 Set Timer Instruction P1 P2 P3 P4 P5 Explanatio n TIS P1 Switch 0 OFF 1 ON Default 0 p2 Start Day 0 Ignore 1 31 1 31 day form today Default 0 p3 Start hour 0 23 0 23h Default 12 p4 Start minute 0 59 0 59m Default 0 P5 Repeat p...

Page 79: ...itch OFF start day Ignore Start Time 12 00 Repeat period 1m 02 01 41 30 2C 30 30 2C 31 32 3A 30 30 2C 30 31 03 65 0D 0A CONp1 Set Contrast Instruction Parameters Explanation CON p1 Contrast Range 0 14 Default 7 ASCII C O N 7 Hex 43H 4FH 4EH 37H Byte 1 1 1 1 Return ACK NAK Example set the contrast as 9 02 01 43 43 4F 4E 39 03 38 0D 0A Return ACK 02 01 06 03 06 0D 0A CON Query Contrast Setting Instr...

Page 80: ...xample set backlight as timeout ON delay 20s 02 01 43 42 4C 54 30 20 31 03 38 0D 0A Return ACK 02 01 06 03 06 0D 0A BLT Query Backlight Setting Instruction Parameters Explanation BLT Query parameter ASCII B L T Hex 42H 4CH 54H 3FH Byte 1 1 1 1 Return Return backlight settings Example query the backlight settings 02 01 43 42 4C 54 3F 03 26 0D 0A Return the current backlight setting is timeout OFF d...

Page 81: ...Gp1 Set Trigger Instruction Parameters Explanation TRG p1 Trigger switch 0 OFF 1 ON Default 0 ASCII T R G 0 Hex 54H 52H 47H 30H Byte 1 1 1 1 Return ACK NAK Example set trigger as OFF 02 01 43 54 52 47 30 03 32 0D 0A Return ACK 02 01 06 03 06 0D 0A TRG Query Trigger Setting Instruction Parameters Explanation TRG Query parameter ASCII T R G Hex 54H 52H 47H 3FH Byte 1 1 1 1 Return Return Trigger sett...

Page 82: ... 41 54 30 20 32 30 31 31 20 38 20 35 03 0D 0D 0A Return ACK 02 01 06 03 06 0D 0A DAT Query Date Setting Instruction Parameters Explanation DAT Query parameter ASCII D A T Hex 44H 41H 54H 3FH Byte 1 1 1 1 Return Return date setting Example query date 02 01 43 44 41 54 3F 03 2D 0D 0A Return the current date format year month day date 5th August 2011 02 01 41 30 2C 32 30 31 31 2F 30 38 2F 30 35 03 52...

Page 83: ... time setting 02 01 43 48 4F 52 3F 03 29 0D 0A Returns the current time is 18 37 48 02 01 41 31 38 3A 33 37 3A 34 38 03 40 0D 0A PWOp1 Set Auto Power Off Instruction Parameters Explanation PWO p1 Auto power off time 0 1min 1 5min 2 10min 3 30min 4 OFF Default 4 ASCII P W O 4 Hex 50H 57H 4FH 34H Byte 1 1 1 1 Return ACK NAK Example set auto power off as OFF 02 01 43 50 57 4F 34 03 3F 0D 0A Return AC...

Page 84: ... Normal 1 Power Boot 2 Boot Auto Measure Default 0 ASCII O P M 0 Hex 4FH 50H 4DH 30H Byte 1 1 1 1 Return ACK NAK Example set bott mode as normal 02 01 43 4F 50 4D 30 03 21 0D 0A Return ACK 02 01 06 03 06 0D 0A OPM Query Boot Mode Setting Instruction Parameters Explanation OPM Query parameter ASCII O P M Hex 4FH 50H 4DH 3FH Byte 1 1 1 1 Return Return boot mode setting Example query boot mode 02 01 ...

Page 85: ...1 06 03 06 0D 0A UMD Query USB Mode Setting Instruction Parameters Explanation UMD Query parameter ASCII U M D Hex 55H 4DH 44H 3FH Byte 1 1 1 1 Return Return USB mode setting Example query USB mode setting 02 01 43 55 4D 44 3F 03 20 0D 0A Return the current USB mode is modem mode 02 01 41 32 03 73 0D 0A GPDp1_p2 Set GPS Instruction P1 P2 Explanation GPD p1 GPS switch 0 OFF 1 ON Default 0 p2 Auto t...

Page 86: ...ing is switch ON auto time sync ON 02 01 41 31 2C 31 03 6F 0D 0A VER Query About Information Instruction Parameters Explanation VER Query parameter ASCII V E R Hex 56H 45H 52H 3FH Byte 1 1 1 1 Return Return the about information Example query about information 02 01 43 56 45 52 3F 03 3D 0D 0A Returns type 309S class 2 S N 490001 version 3 00 141020 HWID P0274 03 B11 02 01 41 33 30 39 53 2C 32 2C 3...

Page 87: ...4CH 4EH 47H 3FH Byte 1 1 1 1 Return Return the language setting Example query language setting 02 01 43 4C 4E 47 3F 03 39 0D 0A Returns the current language is Chinese 02 01 41 31 03 70 0D 0A OUTp1_p2_p3_p4 Set Output Instruction P1 P2 P3 P4 Explanation OUT p1 Filter of SLM 0 A 1 B 2 C 3 Z Default 0 p2 Detector of SLM 0 Fast 1 Slow 2 Imp Default 0 p3 Mode of SLM 0 SPL 1 LEQ 2 Peak Default 0 p4 Out...

Page 88: ...3F 03 32 0D 0A Return the output for SLM A weighting Fast SPL For Octave LAeq 02 01 41 30 2C 30 2C 30 2C 30 03 6D 0D 0A RES Apply Factory Settings Note After receipt of the ACK user must wait at least 6 seconds to finish the operation Instruction Parameters Explanation RES None ASCII R E S None Hex 52H 45H 53H None Byte 1 1 1 None Return ACK NAK Example apply the factory settings 02 01 43 52 45 53...

Page 89: ...ts data They contain the return manner parameter it means Stop return The sound level meter no longer to return measurements data every second after received this instruction Single return The sound level meter will return the measurements data on time after received the instruction Continuous return Automatically return the measurements data every second after received the instruction Therefore t...

Page 90: ...p return 1 Single return 2 Continuous return Query parameter ASCII T P R 1 Hex 54H 50H 52H 31H 3FH Byte 1 1 1 1 1 Return Return 3 Profile screen data Profile 1 Filter Detector Mode Data Profile 2 Filter Detector Mode Data Profile 3 Filter Detector Mode Data Example query 3 Profile screen data 02 01 43 54 50 52 31 20 3F 03 3B 0D 0A Returns the current 3 Profile screen data profile 1 B weighting LEQ...

Page 91: ...65 2dB LN 90 065 2dB LN99 065 1dB 02 01 41 30 2C 30 2C 30 2C 31 30 2C 30 36 35 2E 34 2C 32 30 2C 30 36 35 2E 34 2C 33 30 2C 30 36 35 2E 34 2C 34 30 2C 30 36 35 2E 33 2C 35 30 2C 30 36 35 2E 33 2C 36 30 2C 30 36 35 2E 33 2C 37 30 2C 30 36 35 2E 32 2C 38 30 2C 30 36 35 2E 32 2C 39 30 2C 30 36 35 2E 32 2C 39 39 2C 30 36 35 2E 31 2C 03 58 0D 0A DCU Query Custom Measure Data Instruction P1 P2 Explanati...

Page 92: ... 35 2E 31 2C 30 2C 30 2C 30 35 2C 30 36 34 2E 34 2C 30 2C 30 2C 30 36 2C 30 38 31 2E 39 2C 30 2C 30 2C 30 32 2C 30 38 33 2E 38 2C 30 2C 30 2C 30 30 2C 30 36 35 2E 33 2C 31 2C 30 2C 30 30 2C 30 36 36 2E 34 2C 30 2C 30 2C 30 31 2C 30 30 35 2E 36 2C 31 2C 30 2C 30 31 2C 30 30 37 2E 32 2C 30 2C 30 2C 30 33 2C 32 2E 36 39 36 65 2D 30 35 2C 30 2C 30 2C 30 34 2C 30 36 35 2E 35 2C 31 2C 30 2C 30 37 2C 30 ...

Page 93: ... return Query parameter ASCII D O T 1 Hex 44H 4FH 54H 31H 3FH Byte 1 1 1 1 1 Return Return 1 1 octave band data Filter LAeq LBeq LCeq LZeq 8Hz 16Hz 31 5Hz 63Hz 125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz 16kHz Example query 1 1 octave data 02 01 43 44 4F 54 31 20 3F 03 32 0D 0A Returns the current 1 1 octave band filter is C weighting and data are LAeq 064 7dB LBeq 066 0dB LCeq 066 8dB LZeq 067 1dB 8Hz ...

Page 94: ...54 1dB 250Hz 054 7dB 315Hz 055 5dB 400Hz 055 9dB 500Hz 056 2dB 630Hz 056 3dB 800Hz 056 1dB 1kHz 055 6dB 1 25kHz 054 9dB 1 6kHz 054 2dB 2kHz 053 0dB 2 5kHz 051 8dB 3 15kHz 050 4dB 4kHz 048 8dB 5kHz 046 9dB 6 3kHz 044 6dB 8kHz 041 8dB 10kHz 038 1dB 12 5kHz 033 3dB 16kHz 026 2dB 20kHz 015 0dB 02 01 41 31 2C 30 36 34 2E 38 2C 30 36 36 2E 30 2C 30 36 36 2E 39 2C 30 36 37 2E 31 2C 30 31 37 2E 38 2C 30 3...

Page 95: ...one ASCII C S D None Hex 43H 53H 44H None Byte 1 1 1 None Return Return state 0 Stored successfully MicroSD OK 1 Failure to store MicroSD error 2 No MicroSD Example Save CSD 02 01 43 43 53 44 03 17 0D 0A Return save successfully MicroSD OK 02 01 41 30 03 71 0D 0A PCE 428 430 432 ...

Page 96: ... the product Keep out the water and any other liquid due to no waterproof design on this product Using qualified alkaline battery can extend your operation time and bring benefit to device Do not mix using of old and new batteries at the same time Remove batteries when the device is not in use Long term place the battery inside the product could cause battery leakage and damage to the product 6 2 ...

Page 97: ... need to be prepared PCE 428 430 432 sound level meter HWID P0274 or above and keep power off MiniUSB cable include in sales package External power supply include in sales package Firmware for update download from 3 QVWUXPHQWV website USB driver Silicon Labs CP210x driver can be find in CD ROM or 3 QVWUXPHQWV website Firmware update tool FlashTool Wizard can be find in CD ROM or 3 QVWUXPHQWV websi...

Page 98: ...er sound level meter by external supply when connect to computer 6 4 2 Firmware Update Procedure The firmware update software FlashTool Wizard is very easy to use Please just follow the prompt step by step Run FlashTool Wizard and select language Step 1 prepare the list items for update firmware Step 2 Install the driver Please skip if you already install deriver before PCE 428 430 432 ...

Page 99: ... we advise to keep the latest version of firmware Please no hesitate to contact us by phone call or e mail to request support for any issue or bugs of firmware Note Firmware update is a feature only available for new sound level meter with HWID P0274 or above The old type of HWID P0115 cannot update firmware by user Following list the difference between old type and new type In About page P0115 di...

Page 100: ...ing Fast and Slow are more commonly used while Impulse is not recommended to use and was reserved only for historical reasons SPL Sound pressure level SPL calculated in sound level meter is the greatest time weighted sound level within 1 second LEQ1 Time averaged sound level or equivalent continuous sound level Ten times the logarithm to the base 10 of the ratio of the time average of the square o...

Page 101: ...e level exceeded for N of the measurement period Max1 Maximum time weighted sound level within stated duration Min Minimum time weighted sound level within stated duration SD Time weighted sound level of standard deviation within stated duration SD is used to describe the degree of dispersion changes of sound level Note 1 Refer to the definition of IEC 61672 1 2013 to earn more details PCE 428 430...

Page 102: ...on before the measurement The manual of sound calibrator provide the equivalent free field sound level for 1 2 microphone as shown in the following table Type of Sound Calibrator Frequency Calibration Sound Level for 3 Nominal 94dB Nominal 114dB CA111 1000Hz 93 8dB 113 8dB CA114 1000Hz 93 8dB N A CA115 1000Hz N A 113 8dB PCE 428 430 432 ...

Page 103: ... 8414 0 0 2 15849 0 7 251 19 0 2 1333 5 0 0 2 511 9 0 2 4731 5 1 0 8912 5 0 1 16788 0 4 316 23 0 0 1412 5 0 0 2660 7 0 1 5011 9 0 7 9440 6 0 3 17783 0 3 398 11 0 0 1496 2 0 1 2818 4 1 0 5308 8 0 9 10000 0 2 18836 0 3 501 19 0 0 1584 9 0 1 2985 4 0 2 5623 4 0 3 10593 1 0 19953 0 4 Expanded Uncertainties U 0 17 k 2 4kHz U 0 29 k 2 4kHz Note the frequency with is not requirement of standard refer to ...

Page 104: ...9 1 04 251 19 0 02 1995 3 0 37 15849 1 37 316 23 0 01 2511 9 0 41 19953 1 92 Expanded Uncertainties U 0 15 k 2 4kHz U 0 21 k 2 4kHz Note the frequency with is not requirement of standard refer to IEC 61672 1 for exact frequency 2 0 1 5 1 0 0 5 0 0 0 5 1 0 50 1187 63 0957 79 4328 100 000 125 893 158 489 199 526 251 189 316 228 398 107 501 187 630 957 794 328 1 00000k 1 25893k 1 58489k 1 99526k 2 51...

Page 105: ...0 0 678 10000 4 488 355 0 013 1120 0 116 3550 0 832 11200 5 264 400 0 017 1250 0 140 4000 1 020 12500 6 081 450 0 022 1400 0 170 4500 1 245 14000 6 960 500 0 027 1600 0 213 5000 1 488 16000 7 956 560 0 034 1800 0 260 5600 1 798 18000 8 664 20000 9 272 Expanded Uncertainties U 0 19 k 2 4kHz U 0 34 k 2 4kHz 10kHz U 0 39 k 2 10kHz 0 0 5 0 10 0 50 00 63 00 80 00 100 00 125 00 160 00 200 00 250 00 315 ...

Page 106: ...include the real test result of response of A C and Z weighting Base on the typical response of above figure the impact to upper limit of measurement range for A B and C weighting as shown in the following table Freq Hz 8 16 31 5 63 125 250 500 1k 2k 4k 8k 12 5k 16k A weighting dB 74 8 56 3 39 5 26 2 16 2 8 7 3 3 0 0 1 3 1 2 0 5 4 4 9 7 B weighting dB 43 2 28 2 17 1 9 4 4 3 1 4 0 3 0 0 0 0 0 5 2 3...

Page 107: ... as the shown in the following figure 100 0 90 0 80 0 70 0 60 0 50 0 40 0 30 0 20 0 10 0 0 0 10 0 0 1 1 10 100 1000 8Hz 250Hz Octave Filter Response 8Hz 16Hz 31 5Hz 63Hz 125Hz 250Hz dB Hz 100 0 90 0 80 0 70 0 60 0 50 0 40 0 30 0 20 0 10 0 0 0 10 0 10 100 1000 10000 100000 500Hz 16kHz Octave Filter Response 500Hz 1kHz 2kHz 4kHz 8kHz 16kHz dB Hz PCE 428 430 432 ...

Page 108: ...of each filter as the shown in the following figure 100 0 90 0 80 0 70 0 60 0 50 0 40 0 30 0 20 0 10 0 0 0 10 0 1 10 100 6 3Hz 20Hz Octave Filter Response 6 3Hz 8Hz 10Hz 12 5Hz 16Hz 20Hz dB Hz 100 0 90 0 80 0 70 0 60 0 50 0 40 0 30 0 20 0 10 0 0 0 10 0 1 10 100 25Hz 80Hz Octave Filter Response 25Hz 31 5Hz 40Hz 50Hz 63Hz 80Hz dB Hz PCE 428 430 432 ...

Page 109: ...10 0 10 100 1000 100Hz 315Hz Octave Filter Response 100Hz 125Hz 160Hz 200Hz 250Hz 315Hz dB Hz 100 0 90 0 80 0 70 0 60 0 50 0 40 0 30 0 20 0 10 0 0 0 10 0 10 100 1000 400Hz 1 25kHz Octave Filter Response 400Hz 500Hz 630Hz 800Hz 1kHz 1 25kHz dB Hz PCE 428 430 432 ...

Page 110: ...100 1000 10000 1 6kHz 5kHz Octave Filter Response 1 6kHz 2kHz 2 5kHz 3 15kHz 4kHz 5kHz dB Hz 100 0 90 0 80 0 70 0 60 0 50 0 40 0 30 0 20 0 10 0 0 0 10 0 1000 10000 100000 6 3kHz 20kHz Octave Filter Response 6 3kHz 8kHz 10kHz 12 5kHz 16kHz 20kHz dB Hz PCE 428 430 432 ...

Page 111: ... 119 50 X 63 096 63 X X 79 433 80 X 100 00 100 X 125 89 125 X X 158 49 160 X 199 53 200 X 251 19 250 X X 316 23 315 X 398 11 400 X 501 19 500 X X 630 96 630 X 794 33 800 X 1000 0 1000 X X 1258 9 1250 X 1584 9 1600 X 1995 3 2000 X X 2511 9 2500 X 3162 3 3150 X 3981 1 4000 X X 5011 9 5000 X 6309 6 6300 X 7943 3 8000 X X 10000 10000 X 12589 12500 X 15849 16000 X X 19953 20000 X Note Exact mid band fr...

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