User Manual

3.2 Before Operating
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Chapter 3 Operation Overview
Measured waveforms can be backed up.
The quantity of backup memory affects how long data can be retained (backup
time).
FFT spectra cannot be backed up.
Typical Backup Times
(Beginning at least two hours after power-on)
Smaller memory capacity permits longer backup time.
Charging State
An indicator shows the charging state at the lower right of the screen.
3.2.4 If the Model 9719 Memory Backup Unit is
Installed
Memory Capacity
Backup Time (@25ºC)
8860 8861
With Model 9715-03 Memory Board
(Model 8860: 1 board, Model 8861: 2 boards)
At least
10 hours
At least
5 hours
Display Charging State
Rapid charging
Rapid charging finished
Backup waveform data is cleared in the following cases:
• When an input module is replaced
• After power-on, if power is cut before the Opening screen appears
• Waveform data may not be backed up if the instrument is turned off during
internal processing (such as waveform compression).
• The NiMH battery on the backup unit has a self-discharge characteristic. If the
instrument is not used for a long time, turn the power on to charge the battery
at least once every two months.
• Charge at an ambient temperature between 10 and 40ºC. Charging outside of
this range may result in insufficient charging, and battery capacity may be
reduced or battery life shortened prematurely.