Orban OPTIMOD 8685, Operating Manual

Page: 242 / 357

4-14
MAINTENANCE ORBAN MODEL 8685
c) Verify that the frequencies measured at the 8685’s O
UTPUT
1/2 follow the
values Table 4-4 on page 4-11 within the given tolerances.
13. Test Digital I/O and Sync for Input/Output 3/4 (C/LFE).
Connect the 8685’s O
UTPUT
1/2 BNC connector to its I
NPUT
3/4 BNC connector,
connect the analyzer to
O
UTPUT
3/4,
and follow the procedure in step 4 by anal-
ogy. Use Setups A
UDIT
38 through A
UDIT
42.
14. Test Digital I/O and Sync for Input/Output 5/6 (Ls/Rs).
Connect the 8685’s O
UTPUT
1/2 BNC connector to its I
NPUT
5/6 BNC connector,
connect the analyzer to
O
UTPUT
5/6,
and follow the procedure in step 4 by anal-
ogy. Use Setups A
UDIT
43 through A
UDIT
47.
15. Test the Sync Input.
A) Connect the BNC “Tee” connector to the 8685’s S
YNC
input.
B) Connect
O
UTPUT
1/2
to one end of the “Tee” connector.
C) Connect
I
NPUT
5/6
to the other end of the “Tee” connector.
D) Connect the AES3id analyzer to
O
UTPUT
5/6 (
where it should be already)
.
E) Follow the procedure in step 4 by analogy. Use Setups A
UDIT
48 through
A
UDIT
52.
F) Skip to step 17.
The following steps test the optional HD-SDI module, which has three AES3id inputs
and outputs in addition to an AES3id/AES11id/Wordclock sync input.
16. Test the optional SDI/HD-SDI I/O module
Detailed instructions on testing the optional HD-SDI I/O are beyond the scope of
this edition of the manual but may be added in the future. An outline of the ap-
propriate tests is as follows:
A) Use a test set like the recommended Phabrix to verify that the 8685 can pass a
SMPTE-compliant SDI/HD-SDI signal from its input to output at 480i, 480p,
720p, 1080i, and 1080p at frames rates of 24, 25, and 30 frames/second and
24*(1000/1001) and 30*(1000/1001) (pull-down) frames/second.
B) Verify that the rise time, fall time, and jitter appearing at the 8685’s SDI out-
put meets the following SMPTE specifications. Be sure to use cable with 75
ohm coax and connectors; 50 ohm cable/connectors will degrade the perform-
ance.