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5. No display after pressing [RUN/STOP]
• Check if the trigger mode is set to normal or single in the menu, and whether
the level exceeds the waveform range. If so, move the level to the centre or set
trigger mode to AUTO.
• Press [AUTO] to complete the setup.
6. Display speed is slow after average sampling time is enabled:
• If average sampling is carried out for more than 32 times, the display speed
will drop. This is normal.
• You can reduce the intervals of average sampling.
7. Trapezoidal waveform display:
• This is normal. The reason is possibly horizontal time base range is too low.
You can improve horizontal pixel aspect ratio and enhance the display quality
by increasing the horizontal time base.
• If the display type is vector, the connection between sampling dots may cause
a trapezoidal waveform. Set the display type to dot to solve this problem.
UPGRADE
Product program upgrade
• You can obtain the program upgrade pack from our marketing department or
download it online from our website. Use the built-in program upgrade system of
the oscilloscope to upgrade the program so that it is the latest version released by
Tenma and UniTrend.
• You have to own a compatible oscilloscope manufactured by Tenma. To check
the model, hardware version and software version of the unit, go to the system
information sub-menu under the user menu.
• The software upgrade pack that corresponds with the model and hardware version
of the oscilloscope requiring upgrade is available online from our website or from
our marketing department. The software version should be higher than the one
currently installed.
• Prepare a USB device (disk format FAT). After decompressing the program upgrade
pack, save it in the USB root directory. The program upgrade document has the
sufx “uts”.
• The FLASH type of the program upgrade pack must be the same as the
oscilloscope to be upgraded.
Upgrade procedure
• 1. Power off the oscilloscope then insert the USB device with the program
upgrade document into the USB HOST jack.
• 2. Press [POWER] to power on the oscilloscope and enter the program upgrade
system welcome screen. The following message be appear, “Welcome to the USB
program upgrade system. Please press [F5] to start upgrade or [F1] to cancel”.
• Follow the on-screen prompts to select the le and upgrade the program.
Caution: If power is disconnected or the unit is turned off during this stage of program
upgrade, the oscilloscope will fail to function normally. In that case you have to re-insert
the USB device and complete the upgrade step by step as prompted before normal
operation can be resumed.
When you restart the oscilloscope after successful upgrade, the system will initialise
itself. It will take 30 seconds to 1 minute for the operation screen to appear.
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