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CHPA
S
ERIES
D
OC
.01023245
R
EV
.R
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B-1
B-1
Appendix B
Control Appearance and Content
B.1 Overview
This chapter lists the function of each control key, indicator, and display item on the HPA. For
operational procedures, see Chapter 5, “Operation,”
and Chapter 4, “Initial Power-On and -
Checkout.”
B.2 Buttons
The front panel displays data using a 4-line by 20-character vacuum fluorescent alphanumeric
display and six LEDs (see Figure B-1). A push-button keypad is used for operating the HPA and
entering data. Numerical data will not be entered until the user has pressed the ENTER button.
Data entry that relies on the arrow keys will be updated when the arrow keys are pressed. The
Quick Access Codes are the only exceptions to these rules
Figure B-1. Front Panel Picture