LG 3803 - Manual (Page 9)

CAUTION
1.2.2 Maximum Input Voltage
There is restriction when applying input signals.
Applying excessive voltage to the connector may result instrument damage.
Connector Allowable Input Voltage
REMOTE CONTROL
INC, DEC, RESET Pins
-0.5 V/+5.5 V
FREQ STD 10 MHz INPUT 2.5 Vp-p
SYNC, VALID, CLOCK, DATA -0.5 V/+5.5 V
CAUTION
1.2.3 Reverse Voltage, Excessive Voltage
Do not apply external voltage to the output connectors.
If the cable touches such as DC power source, internal attenuator may be burned-out.
Do not apply 5 Vp-p or greater signal to the output connector.
If ±2V or greater DC component is superimposed, block it using a capacitor.
1.2.4 Backup of Control Settings
This instrument retains the panel settings even when the power is turned off. The
setting can be recalled when the power is turned on.
When the instrument is left for five years without supplying power, the stored data may
be lost.
Notes on Backup Data
Data must be backed up properly since stored data may be lost or changed caused
by incorrect operation, malfunction, or maintenance. A notepad may be helpful in
some cases.
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