IBM 3164 ASCII Manual page 174

Viewing distance
Most operators will find that they can view the screen comfortably at a
distance of 33 to 51 centimeters (13 to 20 inches). This distance, of course
will depend on the individual's eyesight, visual conditions, work-station
layout, and features of the reference or source material.
Product and environmental safety
The following safety factors should be considered:
• Emergency disconnection of power to the branch circuits serving the
equipment.
• Clearances for both operating and service personnel (see the dimensions
and clearances in this chapter). Access clearance for each IBM 3164
must be considered.
• Grounding of branch circuits.
• Lightning protection for power lines and signal lines.
The installation must meet local and national code requirements.
Acoustic noise emission
The following chart shows the typical noise emission values of the IBM 3164.
These values are preliminary and are subject to change.
Acoustic Noise Emission
LwAd LpAm
<LpA>m
Type
Description
Operating Idling Operating Idling Operating Idling I
(dB) (dB) (dB) (dB) (dB) (dB)
3164 DISPLAY
TERMINAL
45
46
22 23 22 22 NO
Notes:
LwAd is the declared sound power emission level production series of machines.
LpAm is the mean value of the sound pressure emission levels at the operator
position (if any) for a production series of machines.
< LpA> m is the mean value of the space-averaged sound pressure emission levels at
the one-meter positions for a production series of machines.
I Impulsive Noise. Entry is either Yes or No.
T Prominent Discrete Tones. Entry is either Yes or No.
All measurements made in accordance with ISO DIS 7779, and reported in conformance
with ISO DIS 7574/4.
T
NO
6-5