User's Manual

Screen Service SDT 200UB – SDT 500UB ARK-1 ATSC Operations

July, 2009 v 1.0 Page 3 - 96

Fan Speed

One of the fans speeds is under the minimum speed level

(1,000 rpm).

I/A

• Check fans connections

• Verify that fans are not damaged; in this case substitute them.

The substitution can be performed during device normal

operations

ITU No SDI Input

• Device in ITU470 mode

• Selected SDI input not locked.

• Check input statistics

X (1)

GPS Lock

• GPS is selected as frequency reference

• GPS communication error alarm is not signaled

• GPS signal is not lock.

I/A

• Check cable and GPS antenna connections

• Hardware fault

X (0)

GPS Communication Error

• GPS is selected as frequency reference

• Communication errors between ARK ATSC main

board and GPS board.

I/A

• Hardware fault

X (0)