RAD Data comm ASM-20 - Manual (Page 31)

Controls and Indicators 3-1
Chapter 3
Operation
This chapter:
• Describes the controls and indicators of ASM-20 and their functions
• Explains the operation procedures
• Provides jumper and switch information.
Installation procedures given in
Chapter 2, Installation and Setup must be
completed and checked before attempting to operate the ASM-20.
3.1 Power On
Apply AC power by connecting the AC power cord to an acceptable AC source.
The PWR LED should light up, indicating that the ASM-20 is on. If the local and
remote ASM-20 units are in operation and passing data, the following indicator
conditions will exist:
• PWR: On
• RTS: On
or Flashing
• TD: Flashing or Off
• RD: Flashing or Off
• DCD: On or Flashing
• TEST: Off.
If you do not obtain the above LED indications following initial power on, check
that the three test push buttons are not depressed.
3.2 Controls and Indicators
All controls (push button switches) and LED indicators are located on the ASM-20
front panel. Their functions are described in
Table 3-1 and correspond to the
identification numbers in Figure 3-1 and Figure 3-2 .