Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
FREETEST Digital Oscilloscope
F2xMxD Series Summary
Horizontal sensitivity : 1nS/Div~10S/Div
Input impedance ≥1MΩ±2%；
Equivalent capacitance ≤ 20pF±2pF
Measuring range ： ±32V（X1）/±300V（X10）
Tantalum capacitive screen, multi-touch (mobile
phone) operation
Coupling ： AC/DC
Low frequency response ： ≤10Hz
DC gain accuracy ： ±2‰
FreeTest Digital OscilloscopeIt is a wireless digital
storage oscilloscope that Connect Mobile-Phone
with WIFI (currently supports Android) for test and
measurement. It only needs a mobile phone +
charging treasure size wireless oscilloscope to
complete the test anytime, anywhere. Full
dual-channel analog path with built-in
high-energy-density lithium battery and full charge
for up to 5 hours of independent test application.
Small size, easy operation and flexible application
scenarios. The interface is beautiful and supports
DC Vertical accuracy : ±2%
Frequency resolution ≤ 0.1%
Charging voltage ： 5V DC
Endurance ： 5 hours （ 2800mAh ） /7.5 hours
（3600mAh）
Charging time：about 7 hours
Reference signal：1KHz/3.3V
Chinese and English menu
Two-in-one function: use only CHA for higher
sampling rate
gestures; WIFI connection allows you to bring your
own lab all the time. Can meet the basic
requirements of school experiments, home appliance
repair, business travel / field testing, electronic
engineering.
Performance Indicators
2-analog channels
Analog channel bandwidth : 40M~50M
Real-time sampling rate : 160Msps ~ 200Msps
Sampling accuracy : 8 bits
Sampling depth : 3000 points/channel ， 6000
points max
Maximum data cache : 128Mb
Horizontal scanning speed : 10nS/Div~10S/Div
Vertical resolution : 7.5 bit
Vertical sensitivity : 4mv/Div~10V/Div(x1probe)
40mv/Div~30V/Div(x10probe)
Feature
Small size and light weight; length, width and
height: 160mmx84mmx28mm, body weight
about 600g.
Support retina phone screen with resolution
greater than 300ppi.
WIFI Connection，IEEE802.11n& IEEE802.11b/g
Support one key screenshot , video function.
ARM®Thumb®Processor，400M Frequency;
Powerful digital signal processing capability.
Application
Teaching experiment
Maintenance
Outside field testing
R&D and test of Electronic Engineering
General application of laboratory
FREETEST Wireless Digital Oscilloscope V2.0
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Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
-
Avoid
fireorpersonal
injury.
-
Use
the
appropriate
power
line.
Please
use
only
-
Correctly
connect
and
disconnect
the
connection
-
Compliance
with
all
terminal
ratings.
To
avoid
-
Do
not
operate
inawet
environment.
-
Do
not
operate
inaflammable
and
explosive
-
please
keep
the
surface
of
the
product
clean
and
-
C
heck
the
existence
of
damage
caused
by
-
Ifitis
found
that
the
packing
carton
or
foam
-
Check
the
whole
machine.
If
the
appearance
of
-
If
there
is
any
damage
to
the
instrument
caused
Functional
examination
-
turnonthe
device
power
switch
to
seeifthe
-
use
the
oscilloscope
probe
to
connect
the
signal
-
Turn
on
the
mobile
WIFI
connection
device,
turn
Parameter
Available：MAX/MIN/Mean/Freq/Vp-p/Avg
Trigger Way: Rising/Descent edge trigger
Trigger Mode：Auto、Single、Require、Normal
Trigger Source：CHA/CHB
External triggering: non support
Automatic Adjustment：Auto/Auto range
Algorithm：FFT/CHA+CHB/CHA-CHB
Storage Space: depending on the user's cell
General safety summary
Read the following safety precautions carefully to
avoid personal injury and prevent any product that is
damaged or connected to this product. In order to
avoid possible danger, please use this product in
accordance with regulations.
the power cord that is specially used for this
product and is certified by the country or region
in which it is located.
correctly. Do not plug or connect the probe or
test conductor to the voltage source. Before
connecting the current probe or disconnecting
phone
Battery：2800mAh/3600mAh
Input Voltage：-32V~32V（x1），-300V~300V（x10）
Charging Connector：Micro-USB
Monitor: color
Screen Size: mobile phone display, consistent
with mobile phone screen.Support One key
screenshot.
Support Video screen function.
the current probe, please turn off the circuit
under test.
fire or electric shock, observe all the ratings and
markings on the product. Before you connect the
product, please consult the product manual first
to find out the detailed information about the
rating.
environment.
dry.
General examination
When you get a new FreeTest wireless oscilloscope, it
is recommended that you check the instrument
according to the following steps:
transportation;
plastic protective pad is seriously damaged,
please keep it until the whole machine and
accessories are tested by electrical and
mechanical properties.
the instrument is broken, the instrument is not
working properly, or the performance test is not
carried out, please contact us.
by transportation, please keep the packing.
Inform the transport department or us that we
will arrange maintenance or replacement.
Perform a quick function check to verify that the
equipment is running normally. Please follow the
following steps:
power indicator is on normal (the initial
equipment may be insufficient and recharged for
a period of time to try again).
to the channel A or B, and connect the
measuring terminal to the 1KHz reference
output point (the other point is the grounding
point).
on the test software, and operate the test
normally.
FREETEST Wireless Digital Oscilloscope V2.0
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Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
Mechanical dimension of instrument
Instrument interface description
Interface Description
LED-A: The data acquisition lamp, green and flashing,
represents the function of data acquisition.
LED-S: The battery indicator light is green. When the
electricity is sufficient, the battery will always
shine. The battery will flash slowly at 80%~30%
and flash quickly when the battery is
insufficient. Please charge it in time.
POWER: Power indicator light, red; often at work.
CHARG: The charging indicator is orange; it is always
bright during charging and automatically
extinguished after filling.
Charging Port: Charging interface, using Micro USB as charging
interface, please use official accessories to
charge.
ON/OFF: Switch, turn off the "OFF" side device and work
on the "ON" side device (charging function is
not affected by this switch, it is recommended
to recharge the device when the equipment is
closed).
Status Reset: Status Reset Key, if the device is unable to
connect, use the slender object (toothpick and
other non-metallic objects) to press the button
for one second from the small hole.
1KHz: Equipment calibration reference signal,
frequency is 1KHz, the amplitude is about 3.3V.
GND: Reference ground for equipment calibration.
Channel A/B: Analog signal input channel, the input
frequency range is: 0Hz to 10MHz, the input
voltage range is: + 16V (X10 gear probe can be
from the measuring end, that is, the probe end
joint does not exceed the + 120V signal;
attention: X10 measurement may lead to the
decrease of measurement precision).
FREETEST Wireless Digital Oscilloscope V2.0
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Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
More support：
Please scan the following two-dimensional code or access
links to get more information.
：
a. FreeTest Introduction
b. Datasheet
c. Software usage description
d. Latest APP
e. Latest firmware
f. Others
www.fescale.com / www.fescale.com.cn
Functional introduction
FreeTest is the world's leading mobile laboratory equipment
research and development expert, and is committed to
creating a new generation of electronic measurement
equipment for the "industry 4" era. FreeTest is the laboratory
equipment R & D center of Guangzhou flet Precision
Electronic Technology Co., Ltd., the center is composed of a
high quality and rich electronic industry practitioner, with
100% of undergraduate and above education. FreeTest
wireless digital storage oscilloscope is the main product of
FreeTest. After a long period of research and evolution, the
third generation of wireless oscilloscopes have been
introduced. With the extreme stability of the system
performance and excellent signal acquisition function, it can
help users to obtain the most real and detailed measurement
results.
At the same time, the FreeTest wireless digital storage
oscillograph is used by the oscilloscope body as the front end
data acquisition device, and through the built-in Linux system
and the WIFI connection with the mobile phone. The wireless
bandwidth up to 150Mbps can seamlessly display the sample
results before the customer's face; we also specially customize
the custom for the user. The mobile phone operation software
for Android system allows users to use the most popular and
high-performance desktop mobile phones as the client to
perform equipment operation and algorithm processing; at
the same time, the user can introduce the most fluent and
convenient display mode of user experience.
The biggest feature of FreeTest wireless digital storage
oscilloscope is to use WIFI to connect the mobile phone for
operation display; let the oscillograph, the traditional and
important laboratory instrument, get a more humanized
operating interface and have more possibilities. FreeTest has
introduced commercial wireless measurements before the
industry, and the mature multi-stage physical sampling
architecture brings you higher measurement progress, stable
wireless connection, and more than 20 meters of remote
operation and results for you to get the distance.
Full dual channel analog sampling; FreeTest provides you with
the mainstream two independent sampling links, and has a
multilevel physical distributary sampling function that is
superior to the industry mainstream two level sub voltage all
hardware automatic switching. The more precise signal carry
selection provides you with more accurate sampling results.
The 1KHz/3.3V reference source; the mainstream digital
voltage reference signal output based on the mobile test
application optimization, provides you with more debugging
possibilities in addition to accurate calibration signals.
The latest Android software technology automatically
matches your mobile client. The display precision of your
mobile phone determines the degree of the display of the
waveform. It can support the highest 2K screen at present and
bring you Retina Display's measurement display.
The WIFI connects to support the IEEE802.11n&
IEEE802.11b/g protocol; the effective wireless communication
distance is over 20 meters, but you can get the latest test
results even if you are not in the laboratory. This function is
especially suitable for Outfield measurement scenarios, such
as vehicle measurement and maintenance, communication
tower detection, UAV field test and maintenance, etc. So that
you can keep the oscilloscope on your body at all times.
FreeTest Wireless Digital Oscilloscope Using
FreeTestwireless oscilloscope is giving you a more free
measurement environment, and speeds up every stage of
debugging - from the quick discovery and capture of the
exception events, to the search waveform records to find the
concerned events, and then to the analysis of the event
characteristics and device behavior.
Remote high speed waveform capture
If you want to debug the design problem, you must first know
the problem. Each design engineer will spend a lot of time
looking for problems in the circuit. If there is no suitable
debugging tool, this task will take a long time and be very
troublesome.
FREETEST Wireless Digital Oscilloscope V2.0
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Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
Trigger
FreeTest can quickly understand the actual work of the device.
This wave shape capture rate is more than 120000 wfms/s,
and can quickly view the common problems of the digital
system, such as the less amplitude pulse, the burr, the timing
problem, and so on, with a very high probability.
To adapt to a longer low probability trigger, the remote
debugging support provided by FreeTest allows the customer
to see the results at any time in the office and keep you better
in the high-intensity debugging task.
Finding equipment problems is only the first step, and then
you must capture care events to determine the root cause. To
achieve this goal, FreeTest provides a complete set of
triggering functions, including rising edge triggers, drop edge
triggers, automatic display triggers, and automatic range
triggering to help you quickly find concerned events. You can
capture many concerned events in one collection, even
thousands of serial packets to further analyze, while
maintaining high resolution to amplify the fine signal details.
One button recording and one button screenshots are more
convenient and valuable test letters.
It can be stored in your mobile phone or TF card. Large
capacity storage media support a large number of screenshots
and video storage.
Gesture zoom and roll
The display and operation interface of a pure capacitor screen
can be arbitrarily zoomed through two fingers. The non step
scaling factor allows you to amplify or narrow the picture of
the time axis and the amplitude axis arbitrarily.
Multipoint measurement
FREETEST Wireless Digital Oscilloscope V2.0
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Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
FreeTest supports multipoint measurement. As long as the
finger is pulled down on the top of the screen, a
measurement point can be selected for the current selected
channel. The measurement points can be placed at the
position of the waveform at will; the current amplitude
reading can be automatically displayed in the measurement
point.
Mathematical operation
FreeTest supports a variety of common mathematical
computations. Including: mathematical functions: additive,
subtraction, multiplication, absolute value, reverse integral,
differential, fast Fourier transform (FFT): support Hammin,
triangl, and Blackma window functions.
frequency signal can reach up to 1 degrees.
Digital signal decoding（UART/RS485/RS232/SPI/IIC
）
Automatic Measurement
FreeTest provides automatic measurement function, with only
one button, you can see a variety of measurement parameters.
Including: frequency, frequency, peak value, maximum,
minimum, mean, RMS, etc.
Li Saru figure (XY mode)
Li Saru's figure is a regular and stable closed curve synthesized
by two harmonic frequencies in the direction perpendicular to
each other. The lissara diagram can be used to measure the
frequency ratio and phase difference of the two signals.
The FreeTest wireless oscilloscope supports Li Sharu waveform
measurement of various waveforms, and provides the specific
phase reading value. The phase measurement of the same
FreeTest oscilloscope supports a variety of bus protocol
analysis and decoding functions. TTL level, 232 level and 485
level serial communication protocol analysis and decoding, SPI
bus signal analysis and decoding, I2C bus analysis and
decoding, and other common protocols support.
FreeTest specially optimizes the decoding speed of the
common bus protocol, achieves the limit sampling utilization
within the bandwidth range, and can achieve high automation
test.
PWM Pulse analysis function
Pulse width modulation (PWM) is a very effective technique
for digital transmission to control analog circuits. It is widely
used in many fields from measurement, communication to
power control and transformation; it is also a hot topic in
people's research.
FREETEST Wireless Digital Oscilloscope V2.0
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Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
FreeTest analyzes PWM from a more professional perspective,
the level range supports from 100mV to 120V, the recognition
rate of the pulse width is 0.02%, supporting the frequency
measurement function; giving you the accuracy of the
speechless
comparison.
Eye map (signal integrity analysis)
The eye diagram is due to the afterglow effect of the
oscilloscope, which overlaps each waveform generated by the
scanning, thus forming the eye diagram. The effect of cross
code crosstalk and noise can be observed from the eye map,
which embodies the characteristics of the whole digital signal
and estimates the degree of the system, so the eye map
analysis is the core of the signal integrity analysis. It can also
be used to adjust the characteristics of the receiving filter in
order to reduce the intersymbol interference and improve the
transmission performance of the system.
Afterglow mode
The persistence mode overlays multiple waveforms on the
same picture, and more frequent data or updated waveforms
show brighter colors than the old ones. This is very useful for
finding burrs.
You can look for hidden rare incidents from a series of
repetitive normal events.
Connection mode of equipment
1、The equipment body must be connected with the standard
probe through the BNC interface.
2、See the switch on the front panel of the equipment to
"ON".
At this point, the POWER light is on. Wait for a minute, LED-A
flickers, LED-S is shining or flashing, and the device is in
normal working condition.
3、The mobile phone opens WIFI, opens the "Mobile Scope" APP, and
clicks the WIFI icon to realize the connection.
FREETEST Wireless Digital Oscilloscope V2.0
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Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
5、Functional verification can be carried out by 1KHz standard
square wave.
The waveform is a square wave with a ratio of 50% and an
amplitude of 3.3V.
4、At this time, the sampling data can be displayed normally,
and graphics scaling, parameter setting and other operations
can be done through the mobile phone interface.
FreeTest Wireless oscilloscope adaptable operation end (App：MobileScope)
APP Introduction
MobileScope is a suitable operating terminal APP for the
development of FreeTest wireless digital storage oscilloscope,
which supports the Android system with the largest share of
the mobile phone system, and can run smoothly in most of
the Android smartphones. MobileScope is connected to the
device by WIFI to display the perfect test data and provide a
variety of measurement operations and waveform display
modes. It is your trustworthy test operation platform.
APP Parameters
Automatic setting: support
Automatic range: support
Reference signal: 1Khz
Automatic measurement: frequency, peak value, maximum
value, minimum value, mean value, RMS and so on.
Sampling mode: waveform averaging, sample sampling and
peak detection
Mathematical functions: addition, subtraction, multiplication,
absolute value, reverse, integral and differential.
Fast Fourier transform (FFT): supporting window functions
such as Hammin, triangl and Blackma.
Cursor cursor: time cursor, amplitude cursor
Transmission channel: communication interaction between
terminal APP software and devices via WIFI
Transmission rate: 16 frames per second
WIFI transmission distance: the linear distance is greater than
20 meters
Endurance time: battery life is more than 6 hours
Display resolution: mobile phone display, consistent with
mobile phone screen.
Display true color: mobile phone display, consistent with
mobile phone screen.
Waveform screenshot: support
Waveform recording: support
Virtual oscillograph: support
FREETEST Wireless Digital Oscilloscope V2.0
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Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
1.
Download
the
latest
version
of
APP's
Apk
fileonthe
official
APP Provide
To ensure product quality, FreeTest team will optimize and
update App functions in time according to customer needs
and user feedback. Users can access the following URLs for
feedback: www.fescope.com, we will follow up in time to
ensure that MobileScope can provide you with a good test
operation service.
APP Update
Users can view version information in MobileScope and check
for updates:
Click on the "System" subdirectory "more" in the side
operation bar to download and update the App.
APP Instructions for installation and use
website, open the Apk file in the mobile phone and install it in
accordance with the relevant steps of the mobile phone, and
install the icon of the MobileScope on the mobile desktop
after installation, that is, the installation is successful.
2. Click the icon to enter MobileScope, click the WIFI button
on the lower right corner to view the connection, and select
the device WIFI to connect, then you can start the operation.
Users can also access the website www.fescope.com to
download the latest version of MobileScope's Apk file.
Product photos
FREETEST Wireless Digital Oscilloscope V2.0
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Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
Automatic
measurement
(Frequency
domain):
3
items,
oneofwhich
canbedisplayed
on
screen
at
any
time.
Advanced
Mathematics:
defining
a
large
number
of
algebraic
expressions,
including
waveforms,
reference
waveforms,
Product technical data
Acquisition system
Acquisition mode
Sampling: collect the value of the sample.
Peak detection: the sampling burrs of all scanning speeds are narrowed to 1.5 ns (1 GHz models), 2 ns (500 MHz model),
5 ns (200 MHz), 7 ns (100 MHz model), 8 ns (80 MHz model).
Average: the average contains 2~512 waves.
Envelope: minimum maximum envelope reflects the peak detection data of multiple acquisition. The number of optional
waveforms of envelopes is 1 to 2000; infinity.
High resolution: real time rectangle can reduce random noise and improve vertical resolution.
Scroll: scroll the waveform from right to left on the screen, scanning speed below or equal to 40 ms/ lattices.
Waveform measurement
Cursor: waveform and screen
Automatic measurement (Time domain): 27 items, at any time, you can display up to 4 items on screen. Measurements
include: cycle, frequency, rise time, descent time, positive duty cycle, negative duty cycle, burst width, phase, positive
overshoot, negative overshoot, total overshoot, peak, peak, amplitude, height, low, maximum, minimum, average, cycle
average, root mean square, periodic mean square, positive pulse number, negative pulse The number, the number of
rising edges, the number of falling edges, the area and the area of the cycle.
Measurements include channel power, adjacent channel power ratio (ACPR) and occupied bandwidth (OBW).
Measurement statistics: average, minimum, maximum and standard deviation.
Reference level: user definable reference level is used for automatic measurement, which can be specified in percentage
or unit form.
Strobe: isolate specific events in the collection and measure them, using screen or waveform cursors.
Waveform histogram: waveform histogram provides a set of data values to indicate the total number of hits in the user
defined area on the display screen. Waveform histogram is not only an intuitive representation of hit distribution, but
also a numeric array of measurable values.
Source: Channel 1, channel 2, reference, mathematics
Type: vertical, horizontal.
Waveform histogram measurement: 12 items, at any time, 4 items can be displayed on the screen at most. The number
of waves, the number of hits in the frame, the number of peak hits, the median, the maximum, the minimum, peak, peak,
average, standard deviation, Sigma 1, Sigma 2, Sigma 3.
Waveform mathematics
Arithmetic: the addition, subtraction, multiplication and division of the waveform.
Mathematical functions: integral, differential, FFT.
FFT: spectrum. The FFT vertical scale is set to linear RMS or dBV RMS, and the FFT window is set to rectangle, Hamming,
Hanning or Blackman-Harris.
Spectrum Mathematics: the addition and reduction of the spectral trace.
mathematical functions (FFT, integral, differential, logarithm, exponent, exponent, square root, absolute value, sine,
cosine, tangent, arc, angle), scalar, up to two adjustable variables, and parametric measurements (cycles, frequencies)
Delay, rise, decline, positive width, width, width, width, phase, positive duty ratio, negative duty cycle, positive overshoot,
negative overshoot, total overshoot, peak peak, range, root mean square, root mean square, high, low, maximum,
minimum, average, cycle average, area, area, and trend chart. For example, (Intg (Ch1 - Mean (Ch1)) x 1.414 * VAR1).
Power supply
Power supply voltage: 5V DC + 10%
Charging interface: Micro USB
Power consumption: less than 2W
Battery capacity: 2800mAh/3600mAh
Physical characteristics
FREETEST Wireless Digital Oscilloscope V2.0
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Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
Appearance size: length 160 mm, width 84 mm, thickness 28 mm.
Weight: net weight of 600 grams
Application mode: mobile handheld
Heat dissipation: natural heat dissipation
EMC、Environment and Safety
Temperature:
Working conditions: -10 C to +55 C (+14 F F to 131 F)
Non working status: -40, C to +71 +71 C (-40 F F to 160 F)
Humidity:
Working condition: +40 C, 5% to 90% relative humidity +40 ~ C to +55 C, 5% to 60% relative humidity.
Non working state: maximum +40 C, 5% to 90% relative humidity +40 C to +55 C, 5% to 60% relative humidity +55 C
to +71 C, 5% to 40% relative humidity, non condensing
Altitude:
Working state: 3000 meters (9843 feet)
Non working state: 12000 meters (39370 feet)
Laws and regulations:
EMC: EC Committee directive 2004/108/EC
Security: UL61010-1:2004, CAN/CSA-C22.2 No. 61010.1: 2004, low voltage instruction 2006/95/EC and
EN61010-1:2001, IEC 61010-1:2001, ANSI 61010-1-2004, ISA 82.02.01
Random vibration:
Non working status: 2.46 GRMS, 5 to 500 Hz, each axis 10 minutes, 3 coordinate axes (30 minutes).
Working state: 0.31 GRMS, 5-500 Hz, each coordinate axis for 10 minutes, 3 coordinate axes (30 minutes)
conforming to IEC60068 2-64 and MIL-PRF-28800 third.
To attack:
Working state: 50 G, half sine, 11 ms duration, three times per axis impact (total impact 18 times) conforming to the
IEC 600682-27 and MIL-PRF-28800 third standards
Noise emission:
Sound power level: 22 dBA (in line with ISO 9296 standard)
Equipment accessories
Name Quant
FREETEST Oscilloscope body x1
40M probe x2
Probe calibration kit x1
Charger x1
After sale and quality assurance x1
Identification of toxic or harmful
substances or elements
x1
FREETEST Wireless Digital Oscilloscope V2.0
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Wireless Digital Oscilloscope Datasheet : F28M6D/F28M7D/F21M6D/F21M7D
List of equipment selection
FREETEST Wireless Digital Oscilloscope V2.0
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