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Operation
CONTACT 1, 2 IN/OUT I
4.2.6
The CONTACT IN/OUT LEDs indicate the presence of relay/contact closure signals. A green CONTACT
IN/OUT LED indicates a closed relay contact, and a red LED indicates an open relay contact.
ENABLED 1, 2 I
4.2.7
The ENABLED 1 (left) and ENABLED 2 (right) LEDs monitor the selected mode of Data channels 1 and
2. They have five states as follows:
! Green indicates a valid mode has been selected.
! Red indicates an invalid mode (spare or TEST mode) has been selected.
! Flashing red/green indicates that no mode has been selected.
! Flashing green/off indicates a valid mode is configured remotely.
! Flashing red/off indicates either an invalid mode or the Test mode is configured remotely.
V
T
4.3
IDEO
EST
The S768DAV includes an internal video test pattern generator that can ease installation and
troubleshooting. The test patterns generated can notify the user of a fiber or video source failure by
outputting specific test patterns on the user's monitor. This mode verifies proper functionality of the digital
decoding process and the fiber-optic interconnections.
Follow the procedures described in paragraph 2.5 to enable the test pattern generator. Figure 13 shows
the test patterns displayed on the monitor.
Disabling the test pattern generator causes no on-screen display during failure conditions.
Single White Bar
No Video Input
to Transmitter
Figure 13. On-Screen Monitor Displays
T
M
4.4
EST
ODE
The Test mode enables you to verify the operation of the video, audio, and data circuits in the S768DAV
units, as well as the fiber connection from the S768DAV transmitter to the S768DAV receiver. To execute
the test mode, perform the following.
Note: Either DATA SELECT switch (SW-1 or SW-2) can be set to position F to enable the video ramp test pattern and the 1 kHz
test tone generator to verify video and audio operation.
24
NDICATORS
NDICATORS
P
ATTERNS
Double White Bar
No Optical Input
to Receiver
S768DAV – S7768DAV User Manual
Ramp Test Pattern
Test Mode Selected
at Transmitter
11-0768DAV-B/ December 2003
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