Memory Backup - JRC JRL-2000F Manual

6
BASIC OPERATION
6.7 Memory Backup
I
Two types of memory are utilized in the JRL-2000F:
• Memory for preset data.
• Memory for maintaining the JRL-2000F's operating states.
Memory for preset data
The preset data written during automatic tuning operations are stored in EEPROM (ROM that
can be electrically rewritten). The preset data are not erased when the JRL-2000F's power
supply is turned oft and the amplifier enters the
STOPPED
state.
Memory for maintaining the JRL-2000F's operating states
Data for maintaining the various operating states of the JRL-2000F (!POWER!,~. meter settings,
antenna switch settings, frequency band settings, etc.) are stored in RAM, which is backed
up by a battery.
The backup state of the memory changes depending upon the DIP switch settings described
in section 7.5.
The backup period for the RAM is approximately two weeks if the battery is fully charged.
During this period, the previous operating state is recovered whenever the JRL-2000F is turned
on. lf the battery has been discharged, the contents of the RAM are lost and the some or
all of the following default settings are recalled depending on the operating mode:
• I
POWER
I :
Off
• Antenna switch: 1
• IE]:
oft
• Meter selection: [fQJ and [jQ]
The above settings are the facory default settings. When the battery is discharged, it can
be recharged by leaving the amplifier in the antenna switch mode or antenna tuner mode
for about three hours or more.
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