4u
for you
4U2SET sv
pour vous
für sie
Corp.
per voi
4U2SMART
CONTENT
SAFETY CAUTION
CE Declaration
Preface
Thank you for purchasing the 4U2SET sv, the sound engineers’ tool. This PDA-size sound analyzer is an
invaluable aid in analyzing and optimizing the audio experience in any venue. In addition to its compact size, it
features an impressive number of built-in functions: 2-channel Real Time Differential Analysis, 2-channel Sound
Pressure Level Meter, Real Time Difference Analyzer, Phase Analyzer, RT60 Decay Time Meter, THD+N Meter,
and Room Equalization Calculator.
The ability of the 4U2SET sv to simultaneously see the difference between 2 inputs provides a whole new way to
analyze sound. Usually one input from the measurement microphone monitors the sound from the speakers while
the second input comes directly from the mixer output. This allows the operator to read the difference between
the mix and actual sound outputs. With an additional measurement microphone, users can also send the second
input through a separate microphone pre-amplifier so that a comparison between different locations or inputs
can be measured in real time. This is particularly useful when determining sound isolation for noise control and
helpful in numerous other audio analysis applications as well.
This real-time analyzer is based on a precision filter technology that meets the strictest regulations of audio
industry standards. Able to read a continuous spectrum, the state-of-the-art 4U2SET sv Analyzer gives the
operator precise information in “real” real time.
Unpacking
Standard package includes following:
1.
4U2SET
8.
One long microphone cable 3 m
2.
One reference / measurement microphone ECM888
9.
One line input pad
3.
One elastic microphone shockmount
10. One CD (contains noise source, PC software)
4.
One mounting bracket
11. One RS-232 data cable
5.
One tabletop tripod stand
12. One charger
6.
One multi-purpose pen
The premium package also includes following:
7.
One short microphone cable 20 cm
One measurement microphone with shockmount
Preparing the unit
C H A R G I N G
M O U N T I N G
The 4U2SET comes with a partially charged battery.
Thread the mounting bracket onto the main unit. Then
It is wise to charge the unit before use. The built-in
thread the microphone shockmount onto the bracket.
battery is the latest technology ~ a lithium ion polymer
Place the microphone in the shockmount and connect
that doesn’t have a memory. A fully charged battery will
the short microphone cable.
power the unit for 3 hours of continuous operation with
The ECM888 reference/measurement microphone is
the backlight on. The stand-by time with a fully charged
calibrated at the factory to work with the 4U2SET sv
battery is more than 1 week.
analyzer. Please use the specific microphone supplied
The battery charger works within a 100VAC to 240VAC
with the unit. Users are encouraged to calibrate the
range. The output voltage is 5VDC and is capable of
unit every year to ensure proper performance. Please
charging the battery and powering the unit at the same
contact your dealer for calibration service.
time. The charging time is approximately 2 hours.
T h e 4 U 2 S E T s v RTA a s s e m b l e d f o r u s e
with mounting bracket, tripod table stand,
and microphone mounted in shockmount.
DC 5V RS232
4LR44
Getting Star ted
DIRECT KEYS
The direct keys are specially designed to make this RTA easy to use. The ESC key works in any
menu.
UP key [KEY 3] will shift the RTA window to a higher scale. Every keystroke will shift 10dB up.
3
6
7
4
5
DOWN key [KEY 4] will shift the RTA window to a lower scale. Every keystroke will shift 10dB
down.
RIGHT key (Zoom in) [KEY 5] will zoom in the RTA to a narrower range window. (100 >> 80 >>
60 >> 40dB)
LEFT key (Zoom out) [KEY 6] will zoom out the RTA to a wider range window. (40 >> 60 >> 80
>> 100dB)
CENTER key [KEY 7] will toggle the range shift / zoom keys to control the other channel. If the
option window is called up, pressing this key will give an OK.
ESC KEY
The ESC button returns to the previous view. This button works the same as the virtual button
that appears in the touch panel screen.
DC power and
charging indicators
TOUCH PANEL
Touching the display with the multi-purpose pen
will activate the backlight and the currently selected
program will be called up. Touch the desired icon on
the screen when a change is needed. Every function
page has an ESC or OK button that leads to the
previous or next menu.
POWER/Back Light
Press and hold the power button for 5 seconds to turn
the unit on and display the main menu. Press and
hold the power key for another 5 seconds to turn the
unit off.
Pressing and releasing this key briefly will turn the
backlight on and off.
MAIN MENU 1
A
real time analyzer
B
sound level meter
C
RTA channel comparison
D
polarity check
E
reverberation time
F
distortion & noise analyzer
G
spectrum average
H
equalizer calculation
A
E
J
B
C
D
F
G
H
J
the left and right arrows toggle from Main Menu 1 to Main Menu 2
MAIN MENU 2
battery meter
K
L
D3
M
D3
file management
K
music instruments
L
system setup
M
Charging battery
External power
R TA , r e a l t i m e a n a l y z e r
The displayed range can be shifted up/down and zoomed in/out with the direct keys on the left-hand side. The
range scale on the left-hand side [D5] will be changed when the shift up/down and zoom in/out keys are pressed.
The minimum display range is 40dB and maximum range is 100dB. Each zoom in/out will change the display by
20dB. The display ranges are: 40dB, 60dB, 80dB, and 100dB. Shift up/down will shift the display 10dB each time
the button is pressed.
D1
D2
function
status
[RUN] indicates the system is running
D5
battery meter
D4
level display
[Main] indicate the Master Level
[A] A-weighting
[C] C-weighting
[F] Flat response or no weighting
XX Hz indicate filter level
X
escape
this scale can be SPLdB (dB SPL), mV/
returns the display to the
V, dBm, or dBV.
previous menu
[PAUSE] indicates the system is on hold D6
D3
scale
decay time
to change decay time. Go to the sub
menu by pressing [2].
1
file menu
TP
touch panel
In the display area,
touching an individual bar
in the graph will pause
the user can save the RTA data to files
the display and shows the
or open files at will
individual filter level at D4.
2
This is especially useful to
setting
for directions on setting the sub-page,
freeze the data and save it
go to page 13
in the file menu
D1
D2
D3
X
D5
D4
TP
D6
2
1
1 channel display mode
D1
D2
D3
X
D5
D4
D6
2
D5
TP
D6
D4
1
2 channel display mode
Press SET on the RTA screen to bring up this option sub-menu
3
CH1 options
4
CH2 otions
5
scale options
6
decay options
7
peak on/off
8
equal loudness contours on/off
9
OK to finish setting, go back to RTA
3
5
6
7
9
4
10
8
10 toggle the channel to turn on/off
if both channels turn off, CH1 will automatically turn on
S L M ~ s o u n d l eve l m e t e r
In this mode, the 4U2SET becomes a standard SLM with either 1 or 2 channels. Each channel can be switched
between different scales and settings. There are fast/slow decay time selections, and A, C, or Flat weighting
selections. The 94dB Calibrator can instantly calibrate the SLM or the user can also set the calibration level to an
SPL of something other than 94dB if desired.
D3
D1
15
D1
function
D3
battery meter
D7
barograph level display
D8
under range / over load
11
X
16
12
D8
13
14
warns when the measurement
scale is exceeded.
5
D7
5
11 channel selections
toggle from 1, 2, or 1+2
D3
D1
scale selections
16
11
15
X
12
12 fast / slow decay
fast @ 125ms
slow @ 1 s.
12
13
13
D8
14
14
13 weighting A/C/Flat
A-weighting, C-weighting
and flat response setting
14 calibration (P. 16)
5
15 clear the peak hold
16 maximum peak hold
X
escape to previous menu
D7
5
S L M
c a l i b r a t i o n
Tap the calibration key (14) to view this
page. In this menu, you can enter the
calibration value by using the numeric
keypad (17). The input value will be
displayed in (D9). Confirm the calibration
by pressing (19). In case the calibration
needs more than 5dB correction, a
warning message will be displayed.
If there is a mistake in the input, use (18)
to clear. If you do not want to enter a
calibration, use (X) to escape.
D9
X
19
17
D9
calibration value display
18
17 0~9 and decimal to enter value
18 clear the entered value
19 return to calibrate with the value
X
escape to previous menu
calibration will run after [19] was pressed. if the correction
exceeds 5dB, it will be out of range.
Sound Level Calibrator
system calibrating
Measurement Mic
1/4” to 1/2” adapter
out of range error
D I F F, d i f fe r e n c e a n a l y ze r
The ability to simultaneously see the difference between 2 inputs provides a whole new way to analyze sound:
The Absolute Mode makes it possible for the sound engineer to analyze the difference where the master level is
important, such as in room isolation. With CH2 showing the master level input, the user can sample the space,
using the CH1 input to determine the best sound isolation location.
The Relative Mode ignores the master level difference and uses only the audio spectrum difference for
comparison. With one channel reading the speaker output and the other channel reading the console line output,
the sound engineer can determine the frequency response of the performance space in relation to the actual
audio output. Now the equalizer can be trimmed to balance the sound in any venue, even with an audience.
D1
D2
function
status
[RUN] indicates the system is running
D4
level display
[Main] indicates the Master Level
[A] A-weighting
[PAUSE] indicates the system is on hold [C] C-weighting
D3
battery meter
[F] Flat response or no weighting
XX Hz indicate filter level
D5
scale
The scale is always in dB. Since
the difference is always in the
same scale, there is no dBu, dBV,
or dB SPL measurement scale to
deal with.
1
TP
file menu
touch panel
User can save the data to files, or open
In the display area, touching an individual bar in the graph will pause
files at will. Same file type as 2-CH RTA
the display and show the individual filter level at D4. This feature is
20
especially useful to freeze the data, then save it in the file menu.
absolute mode
D1
Scale fixed at 90dB range. The value
displayed is the difference between the
master level (CH2) and the room analysis
(CH1) with CH1’s value < CH 2.
21
20
D2
D3
21
D5
Scale fixed at +/-16dB range. A
positive value indicates CH1 is higher;
22
decay time
To change decay time. tap this key.
X
escape
return to previous menu
1
X
D4
relative mode
a minus value indicates CH2 is higher
22
TP
1
TP
file menu
touch panel
user can save the data to files or open
In the display area, touching an individual bar in the graph will pause
files at will; same file type as 2-CH RTA
the display and show the individual filter level at D4. This feature is
20
especially useful to freeze the data, then save it in the file menu.
absolute mode
D1
scale fixed at 90dB range. The value
displayed is the difference between the
master level (CH2) and the room analysis
(CH1) with CH1’s value < CH 2.
21
20
D2
D3
21
D5
scale fixed at +/-16dB range. A positive
value indicates CH1 is higher; a minus
22
decay time
to change decay time. tap this key
X
escape
return to previous menu
1
X
D4
relative mode
value indicates CH2 is higher.
22
TP
CHECK, polarity check
Mis-matched polarity of the loudspeakers will cause problems with the sound. To verify loudspeaker polarity one
by one without the proper tools demands a lot of time and labor. The easiest way to determine the polarity is to
feed the loudspeakers positive pulses individually and measure this function with the 4U2SET. (CH1 vs. pulse is
the default mode.)
To measure without positive pulses, the user can send a reference signal to CH2 and compare it with CH1.
function
X
D3
battery meter
return to previous menu
23
CH1 vs. pulse
D1
escape
D1
D3
X
24
23
positive pulses from a sound source are
compared with the CH1 input
24
CH1 vs. CH2
comparing input 1 and 2 for polarity
25
threshold level
prevent back ground noise influence.
from 70dB SPL to 100dB SPL.
25
speaker connection example pictures
RT 6 0 , r eve r b e r at i o n t i m e
RT60 denotes the reverb time for a 60dB decay. To measure the RT60, engage the SLM mode first to determine
the background noise level. Then prepare a 40dB higher pink noise source.
Once the pink noise source is ready, mute it and enter the RT60 mode. [Press to start] to start the procedure.
The 4U2SET will verify the background noise first and display [ready]. The user can then un-mute the pink noise
for about 3~6 seconds and then abruptly mute it again. The 4U2SET will display the result after the RT60 is
calculated. If the 4U2SET cannot find the result, press ESC to stop the 4U2SET, make sure your noise level is
properly set and the procedures are followed. [NEXT] is for fast multiple measurements. Users are encouraged
to take multiple samples in order to determine the mean value.
check background noise level
with SLM or RTA
prepare the 40dB higher noise
source, with SLM
mute the noise, engage the
RT60, press to start
[ready] displayed
release noise for 3~6 sec. and
stop abruptly.
result is displayed, press [next]
to take another sample
D1
function
D3
battery meter
verify only background noise
is present, then press panel
to start sample [26]
D10 background
D11 ready
D13 file name
1
file management
26
press to start
27
next
X
escape
D3
D1
D12 result
1
D13
X
return to previous menu
26
D10
U n - m u t e
prepared pink
noise for 3~6
sec. and stop
abruptly
D11
D1
1
D13
X
D12
27
Here is your result. You
can save it, or go to the
next measurement by
pressing Next [27].
Multiple measurements
are recommended in
determining the RT60
level.
THD+N ~ total har monic distor tion and noise
In order to determine the total harmonic distortion and noise of a system or component, the 4U2SET analyzes
the input signal and the output signal at the same time. CH1 is connected with a line level signal coming from the
input of the system or component being analyzed with an appropriate level adapter; i.e, line input pad for a line
level signal. CH2 is connected to the line level output of the item being tested or the speaker output of the sound
system as measured by the included reference microphone.
The lowest THD+N level the 4U2SET can detect is -60dB, equal to 0.1%
Prepare a sine wave source
Send the sine wave to the input
of the unit or system under test
Connect CH1 of the 4U2SET to
the input of the unit or system
under test
Connect CH2 to the output of
the unit or system under test
Start the sine wave source
Read the result continuously
D1
function
D2
status
D3
battery meter
1
file management
TP
D3
D1
1
D2
touch panel
In the display area, touching the
panel will bring the system to pause.
This is
especially useful to freeze
the data, then go to file menu to save
it.
X
escape
return to previous manu
TP
X
S p e c t r u m
A v e r a g e
To determine the optimum EQ curve for a sound system, multiple measurement points of the same
speaker coverage area are necessary. These multiple measurements can then be combined to give
an average curve for that space.
D1 function
D13 file name
D14 filter data
D1
28
29
D13
X
direct read out of 3 filters
1
file management
28
result page
29
spectrum select page
TP
touch panel
touching a bar in the graph will display
the averaged value of the bars in D14
X
escape
return to the previous menu
TP
D14
30
source files
select the file you need, and it will be
displayed at the selected list, touch
32
again to de-select the file.
31
30
selected files
31
the selected files will be displayed on
the selected file list; touch again to deselect any file(s).
32
GO, calculate
J
4U2SET will average the selected
files and go to the result page.
J
scroll bar
go to next/previous pages.
J
Equalizer Setting Calculator
The equalizer setting can be calculated from the RTA spectrum or the spectrum average files. The equalized
curves are usually not a simple flat line. High frequency roll-offs and low frequency roll-offs are generally needed.
The 4U2SET provides the frequency point and roll-off slope selection for the user to determine the optimum curve.
D1
function
D1
D14 filter data
34
33
D13 file name
1
X
D13
simultaneous read out of 3 filters
1
file management
33
result page
34
setting page
TP
touch panel
touching a bar in the graph will display
the averaged value of the bars in D14
X
escape
TP
D14
D1
function
35
RTA / AVG
switches the type of source file.
36
file recall
39
frequency point
brings up a sub-page to select the
roll-off frequency points.
brings up the file page to select the
D1
desired file; when a RTA file containing
2-channel data is recalled, a dialog
36
window will pop-up to choose CH1 or 35
37
CH2.
37
completed
when the source file is selected and
the EQ target curve is set, this key
will run the calculation and go to the
38
38
result page
38
slope ratio
changes from flat, -3, -6, -9, and
-12dB/oct.
39
39
TP
touch panel
touch the frequency point (#39) to
change the low and/or high frequency
roll-offs. The frequency selections
are the 31 center frequencies.
TP
equalizer examples
F i l e
M a n a g e m e n t
Files can be opened, saved, or deleted in this file folder page. Touch the file directly, or type in the file name by
calling up the keyboard page
D1
function
40
file name entry
D3
battery meter
D1
tap here to call up the keyboard
41
open file
42
save file
43
delete file
44
file type folders
TP
touch panel
in the display area, touching the file
name on the screen selects the file and
displays it in 40.
J
scroll bar
D3
40
42
41
43
44
TP
J
45
alphabet keys
46
upper / lower case
47
delete / back space
48
enter / end keyboard
49
numeric keys
45
46
47
48
49
Music Intruments Spectrum
Fundamental frequency spectrums of music instruments are collected in these 2 pages. This helps sound
engineers to determine low-cut filters, equalizer settings, and microphone selections. The frequency range extend
from 16Hz to 4188Hz.
D3
D1
X
D1
function
D3
battery meter
J
scroll bar
X
escape
J
D3
D1
X
D1
function
D3
battery meter
J
scroll bar
X
escape
J
S E T U P, s y s t e m s e t t i n g
All the system setting can be found on this page. These include touch panel calibration, backlight setting, powersaving setting, data link to PC, and memory status.
D1
D1
function
D3
battery meter
50
touch panel alignment
51
back light setting
52
power saving setting
53
PC data link
54
memory status
X
escape
D3
X
50
51
52
53
54
T O U C H PA N E L a l i g n m e n t
Precision touch panel calibration is needed in some of the functions in order to make the best use of 4U2SET.
Please go through the 5-point alignment when first starting the system. The alignment data will be kept as long
as the rechargeable battery is not fully drained.
55
1st, center
56
2nd, upper left
57
3rd, lower right
58
4th, lower left
59
5th, upper right
TP
touch any point to leave
Note: direct key [7] will
re-start touch panel
alignment.
59
56
55
58
TP
57
BACK
LIGHT
setting
To make the best use of the display and battery power, the backlight should be set at the optimum level and
turned off when not in use. However, in cases where the backlight needs to be kept on, the user can set the
backlight to be manually controlled. There are 3 brightness levels to choose from.
D1
function
D3
battery meter
D3
D1
D15 selected brightiness level
60
60
auto off
62
61
auto off timmer
62
manual control
63
high level
64
mid level
65
low level
X
escape
61
65
64
63
D15
X
POWER
setting
To save battery power, the 4U2SET can auto power-off after being idle for a specified time. For demonstration
purposes or when using the power adapter, the user can set the auto-off function to manual control.
D3
D1
D1
function
D3
battery meter
D16 estimate battery condition
66
auto off
67
auto off timmer
68
manual control
X
escape
67
66
68
D16
X
P C
L I N K
To manage files between a PC and the 4U2SET, simply connect the 4U2SET to a PC with the included RS232
data cable.
D1
D1
function
D3
battery meter
D3
D17
D17 linking status
X
escape
X
M E M O RY S TAT U S
The user can save over 250 files in the onboard memory. On this page, the RTA files are 1-channel RTA data.
2-channel RTA or Difference files are counted as DIFF files.
D1
D1
function
D3
battery meter
D3
D18 memory status
X
escape
D18
X