238 Chapter4
Assembly Replacement
Procedure 10 . BT1 Battery
Procedure 10.BT1 Battery
WARNING Battery BT1 contains lithium polycarbon monofluoride. Do not
incinerate or puncture this battery. Dispose of discharged
battery in a safe manner.
CAUTION To avoid loss of the calibration constants stored on the A2 controller
assembly, connect the spectrum analyzer to the main power source and
turn on before removing the battery.
The battery used in this instrument is designed to last several years.
An output voltage of +3.0 V is maintained for most of its useful life.
Once this voltage drops to +2.6 V, its life and use are limited and the
output voltage will deteriorate quickly. When the instrument is turned
off, stored states and traces will only be retained for a short time and
may be lost. Refer to “State- and Trace-Storage Problems,” in Chapter
10 , “Controller Section.” The battery should be replaced if its voltage is
+2.6 V or less.
Removal/Replacement
1. Remove any option module attached to the rear panel.
2. Locate the battery assembly cover on the spectrum analyzer rear
panel. Use a screwdriver to remove the two flathead screws securing
the cover to the spectrum analyzer.
3. Remove the old battery and replace it with the new one, ensuring
proper polarity.
4. Measure the voltage across the new battery. Nominal new battery
voltage is approximately +3.0 V. If this is not the case, check the
battery cable and A2 controller assembly.
5. Secure the battery assembly into the spectrum analyzer.
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