Advanced Operations
Battery Running Time
The Built-in Battery Charger
Firmware Upgrade
DSO 094 uses one 3.7V 1200mAh Li-ion battery. When fully charged it can last
about 4 hours. If LCD backlight is turned off it can last longer.
The built-in charger is programmed to charge battery at current about 100mA. It
requires about 16 hours to fully charge a completely discharged battery. To charge
battery connect the USB port to PC or power adapter with USB connector. The
battery sign will blink indicating charging is under going.
From time to time firmware may need to be upgraded for new functions or
improved performance. This can be done by the built-in bootloader. For how the
bootloader works and how to use it please refer to
LedScope/e094.php
Set up USB Connection
To use USB connection PC driver for CP2102 needs to be installed. The driver can be
downloaded at
.
www.silabs.com/products/mcu/pages/usbtouartbridgevcpdrivers.aspx.
Windows driver is also available at
www.jyetech.com/Support/Drivers&Tools.php
Save Captured Waveform
Press [MENU], scroll to "SAVE WAVEFORM" and press [HOLD]. Follow screen
instructions to save waveform to selected buffer.
Recall Saved Waveform
Send Screen as Bitmap File
1 ) Connect USB cable. Run a PC application that can handle XModem Protocol
(Windows HyperTerminal, for example). Set communication format to
and prepare it for file receiving.
38400bps,
8 data bits, 1 stop bit, no parity, no flow control
2 ) Adjust captured waveform so that the interested portion is displayed on screen.
3 ) Enter MENU and execute "SEND SCREEN".
You will see screen as shown in photo at right.
Restore Factory Default Settings
Press [MENU], scroll to "RECALL WAVEFORM" and press [HOLD]. Follow
screen instructions to recall saved waveform from selected buffer. Recalled wave-
form is displayed under HOLD state.
4 ) You can either start sending by first pressing
[HOLD] button then enabling PC receiving.
Or you can first enable PC receiving then press
[HOLD] to start sending. We recommend you
use the former sequence because it usually
results in shorter wait time.
Change Record Length (waveform buffer size)
Change Trigger Position (Pre-trig Length)
Change Trigger Sensitivity
Press [MENU], scroll to "RECALL WAVEFORM" and press [HOLD]. Follow
screen instructions to select record length desired.
Trig position is where the trig point is over the whole waveform buffer (see figure
below). You may like to set trig position closer to buffer start or to buffer end
depending on which portion of waveforms you are more interested.
In DSO 094 trig position is represented as percentage of buffer size. To change it
press [MENU], scroll to "CHANGE TRIG POS" and press [HOLD].
Trig sensitivity is the minimum level required to produce trigs. In DSO 094 it is
expressed as number of one tenth of major screen division size.To change it p
Default value is 4.
ress
[MENU], scroll to "CHANGE TRIG SEN" and press [HOLD]. The adjustable
range is 2 - 40.
Pre-trig Length
Buffer Size
Trig position
Press [MENU], scroll to "RESTORE DEFAULT" and press [HOLD]. Default values
are listed in the table at next page.
Maintenance
Hint: The reboot function under Menu is a quick way to enter the bootloader.
Powered From USB
When connectting the device to USB good quality cable is strongly recommended.
Bad cable could create too much voltage drop and consequently the device may
not be able to work properly.
Parameter
Range
Time base
H. Position
Ch 1 Sen.
Ch 1 Couple
Ch 1 V. Pos.
Ch 2 Sen.
Trigger Slope
Trigger Level
Trigger Src.
Trigger Pos.
Ch 2 Couple
Ch 2 V. Pos.
Trigger Mode
Trigger Sen.
Record Length
Working Mode
10M/div -- 0.2us/div
0 -- (Rec. Len. - 100)
2V/div -- 10mV/div
DC, AC, GND
-127 -- +127
Auto, Normal, Single
Falling, Rising
Ch 1, Ch 2
0% -- 100%
2 -- 40
500 -- 8000 points
Y/T, Y/X
Default
-127 -- +127
2V/div -- 10mV/div
DC, AC, GND
-127 -- +127
1ms/div
0
10mV/div
10mV/div
10
-10
Auto
Falling
0
Ch 1
50%
4
1000
Y/T
Parameter Ranges and Defaults
Channel Configuration
DSO 094 can be set to display two channels or one channel only by the Channel
Configuration Switch at top-left corner of panel. When it is set to one channel only
the not-selected channel is not displayed. However, its signal is still captured.
Number of Channel
2
Max. Sampling Rate
Analog Bandwidth
Max. Sensitivity
Resolution
Max. Record Length
Max. Sampling Rate
Fastest Time Base
Max. Input Voltage
Input Impedance
Num. of Waveform Mem.
Screen Size
Power Supply
Current Consumption
Dimension
Weight
50MSa/s
0 -- 10MHz
10mV/div
50Vpk (1X probe), 400Vpk(10X probe)
1M ohm/20pF
8 bits
8000 points
0.2us/div
4
128 X 64
Battery/USB
~300mA
140 x 70 x 30mm
190g
Trigger Modes
Trigger Position
Auto, Normal, Single
0% -- 100%
Specifications
Built-in Test Signal
The built-in test signal is a square wave signal with fixed frequency of 1KHz and
amplitude of about 1V peak-to-peak..
Technical Support:
Forum: http://forum.jyetech.com
