Modes of operation, Power up, Boot fail – Wegener Communications 4422 User Manual
Page 29: Alarm, warning, & normal, Section 3 operation, 1 modes of operation, Ower, Larm, Arning, Ormal
Page 29
Page 29 of 72
UTY4422-002
SECTION 3
OPERATION
3.1
MODES OF OPERATION
3.1.1 Power
Up
At power up, the unit does a quick checksum test on the EEPROM. When the test passes, the
unit then initializes various devices and configures itself according to the EEPROM settings. It
then waits for the receiver board to complete its boot-up. When the receiver board boots up, the
unit sends a tune request to the receiver board and the Welcome Banner to the serial port. The
unit then enters alarm mode until all of the alarm conditions are cleared. Total boot-up time is
approximately 25 seconds, but may vary somewhat.
Also, while in power up mode, each of the Unity 4422’s LED's will
. See
3.1.2 Boot
Fail
If any of the boot fail conditions occur, the unit will enter “boot fail” mode. While in this mode,
the unit is essentially dead. All audio and video is muted, the alarm relay is closed, the general-
purpose relays are all open, and the unit does not attempt carrier acquisitions, etc.
3.1.3
Alarm, Warning, & Normal
(Page 31) for a complete list of alarm/warning conditions
and for information on the LED's during these modes. The overall behavior of the unit is very
similar for any of these modes, and the following is a list of their differences:
• Alarm and User Relays. See Section
• Video, if used, is alarm frozen if No
Data for less than 5 seconds, No Video for less
than five seconds, or in fade mode for less than 10 seconds.
• Video is muted for all alarm conditions except Alarming Eb/No.
• Audio is muted for all alarm conditions except Alarming Eb/No and No Video Data.
• LED's are unique for each of these modes.