Crystal Vision
Installation
TANDEM-300 User Manual R1.2
67
14/02/2008
7.3 Using GPI outputs
GPO 5 and GPO 6 can be assigned from Statesman and/or the card-edge controls to signal
an error condition when loss of video, audio or AES reference occurs.
GPO 5 and GPO 6 may be assigned to signal paths as follows:
GPO 5 assignment
GPO 6 assignment
SDI 1 / De-embedder A / Embedder C
SDI 1/2 De-embedder B
A GPO will be asserted low if any of the following conditions arise:
•
loss of SDI input
•
loss of selected embedded audio group input if de-embedder enabled
•
loss of AES 1 input to DIP2 or DIP2-RS card
•
loss of AES 2 input to DIP2 or DIP2-RS card if that error condition in enabled
by Statesman, or set to 'flag' by card-edge control - ignored if box not ticked, or
set to 'mask', respectively.
•
loss of AES reference input to DOP2-75 or DOP2-110 if that error condition in
enabled by Statesman, or set to 'flag' by card-edge control - ignored if box not
ticked, or set to 'mask', respectively
•
loss of 'active audio content' if that error condition in enabled by Statesman, or
set to 'flag' by card-edge control - ignored if box not ticked, or set to 'mask',
respectively
Loss of active audio content or silence occurs when audio peaks are sustained at below 30
VU / -50 dBFS for a period longer than the Silence Detect Delay.
Values for Silence Detect Delay for both sides start at 1.5s and then in increments of 8s
from 8s to 120s.
DTB-AV GPI connections
GPI lines ‘a’ to ‘f’ of each TANDEM card connect to the rear remote connector as
follows:
Slot no.
‘a’ pin
‘b’ pin
‘c’ pin
‘d’ pin
‘e’ pin
‘f’ pin
1
1 2 3 4 5 6
2
9 10 11 12 13 14
Note:
Remote connector is 15 way normal density D-type socket. Frame ground is pin 15.
