Installation
TDS 500B, 600B and TDS 700A Service Manual
2–3
Memory modules with on-board batteries allow the TDS 500B, 600B and
700A 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.
Operating Environment
The following environmental requirements are provided to ensure proper
operation and long instrument life.
Operate Digitizing Oscilloscopes where the ambient air temperature is from 4_ C
to +45_ C (+50_ C for the TDS 500B and 700A) with no diskette in the floppy
drive. Store the oscilloscopes in ambient temperatures from –22_ C to +60_ C
with no diskette in the floppy drive. After storage at temperatures outside the
operating limits, allow the chassis to stabilize at a safe operating temperature
before applying power.
The Digitizing Oscilloscopes are cooled by air drawn in and exhausted through
their cabinet side panels by an internal fan. To ensure proper cooling of the
oscilloscope, allow at least two inches clearance on both sides and 3/4 inch on
the bottom of the oscilloscope. (The feet on the bottom of the oscilloscope
provide the required clearance when set on flat surfaces.) The top of the
oscilloscope does not require ventilation clearance.
CAUTION. If air flow is restricted, the Digitizing Oscilloscopes’s power supply
may temporarily shut down.
Applying and Interrupting Power
Consider the following information when you power on or power off the
instrument, or when power is interrupted due to an external power failure.
Upon power on, the oscilloscope runs a power-on self check. If it passes, the
oscilloscope displays a “passed” status message and a prompt to press CLEAR
MENU to continue. If it fails, the oscilloscope displays a diagnostic log that
identifies the area(s) that failed and a prompt to press CLEAR MENU to
Memory Backup Power
Operating Temperature
Ventilation Requirements
Power On
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