Power Cord Information; Operating Voltage; Memory Backup Power - Tektronix TDS 520A Service Manual

General Information
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Power Cord Information

A power cord with appropriate plug configuration is supplied with each
TDS 520A, 524A, 540A, & 544A Digitizing Oscilloscope. Table 2 1 gives the
color coding of the conductors in the power cord. If you require a power cord
other than the one supplied, refer to Figure 2 1 Power Cord and Plug
Identification.
Table 2 1: Power Cord Conductor Identification
Conductor
Ungrounded (Line)
Grounded (Neutral)
Grounded (Earthing)

Operating Voltage

This oscilloscope operates with any line voltage from 90-250 VAC
any line frequency from 47-63 Hz. There are two fuses, either of which may
be used throughout the line voltage and frequency ranges. (The two fuses
are not totally interchangeable as each requires a different fuse cap.)

Memory Backup Power

Memory modules with on board batteries allow TDS 520A, 524A, 540A, &
544A Digitizing Oscilloscopes to retain some types of data upon loss of the
AC power source. The stored adjustment constants, saved front panel
settings, current front panel settings (instrument status), and waveforms
saved in memory are retained.
The on board batteries of the memory modules have a shelf life of about five
years. Partial or total loss of stored settings upon power on may indicate that
the memory modules need to be replaced.
Color Alternate Color
Brown Black
Light Blue White
Green/Yellow Green
Operating Information
with
RMS