User's Manual

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

July, 2009 v 1.0 Page 3 - 98

Signal 129 MHz Lock

• GPS communication error alarm is not signaled

• GPS lock alarm is not signaled

• 10 MHz lock alarm is not signaled

• 129 MHz is not locked.

I/A

• 129 MHz oscillator can loose the lock

• Hardware fault

Signal 960 MHz Lock 960 MHz is not locked. I/A

• Hardware fault

Down Converter Osc. Unlock

PLL of the Down-converter board not locked to 129 MHz

clock.

• Hardware fault

X (0)

ITU Wrong Input Standard

• Device in ITU470 mode

• Selected SDI signal standard is not NTSC

• Check input statistics

X (1)

RF Input Squelch

• Device in ATSC mode

• RF input alarm is not signaled.

• RF signal level under the squelch threshold

• Check Squelch alarm threshold

• Check input channel

• Check RF input source and signal

X (0)