OPTIMOD-AM DIGITAL
MAINTENANCE
4-11
B)
Be sure you are still in
B
YPASS
mode [see step (3.F)].
C)
Navigate to
S
ETUP
>
D
IG
I
N
C
ALIB
and
S
et the
I
NPUT
to
D
IGITAL
.
D)
Connect the digital source generator to the AES3 Digital Input XLR connector
of the 9400.
E)
Set the frequency of the digital source generator to 400 Hz and its output
level to 6 dB below full scale.
F)
Inject the Digital Input with a sample rate of 32 kHz, 44.1 kHz, 48 kHz, 88.2
kHz, and 96 kHz. Use 24-bit words.
G)
Listen to the analog outputs of the 9400 and verify that the output sounds
clean and glitch-free regardless of the input sample rate.
H)
Leave the digital source generator connected to the 9400.
7.
Test Digital Sample Rate Converter (Transmitter).
A)
Connect an AES3 analyzer (like the Audio Precision System 2) to the 9400’s
AES3 Digital Output #1.
B)
Set the sample rate of the digital source generator to 48 kHz.
C)
Navigate to
S
ETUP
>
D
IG
O
UT
C
ALIB
.
D)
Change the
D
O
R
ATE
to 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz, and
verify that the frequencies measured at the 9400’s AES3 output follow the
values in the chart below within given tolerances:
Sample Rate
Tolerance (PPM)
Tolerance ( Hz)
32.0 kHz
100 PPM
±1.60 Hz
44.1 kHz
100 PPM
±4.41 Hz
48.0 kHz
100 PPM
±2.40 Hz
88.2 kHz
100 PPM
±
8.82 Hz
96.0 kHz
100 PPM
±
4.80 Hz
E)
Repeat steps (A) through (D) for Digital Output #2.
F)
Disconnect the digital source generator from the 9400.
8.
Optional tests.
A)
You can test each GPI (Remote Interface) input for functionality in the obvi-
ous way, by programming a function for it and then verifying that the func-
tion executes when you activate the input. To program a GPI input, see
Remote Control Interface Programming
on page 2-46.
B)
You can test the RS-232 Port 1 for functionality by verifying that you can con-
nect to a PC through a null modem cable. See
Networking and Remote Con-
trol
starting on page 2-47 (in particular, step 4 on page 2-49).
C)
You have made all of the previous tests with the 9400 is
B
YPASS
mode. In most
cases, these tests are sufficient to determine that the 9400 is working cor-
rectly. However, the
B
YPASS
mode does not use all of the DSP chips, so the
Summary of Contents for Optimod-AM 9400
Page 1: ...Operating Manual OPTIMOD AM 9400 Digital Audio Processor Version 1 2 Software...
Page 7: ...Operating Manual OPTIMOD AM 9400 Digital Audio Processor Version 1 2 Software...
Page 52: ......
Page 204: ......
Page 232: ......
Page 260: ......
Page 261: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 29...
Page 267: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 35 CPU Module...
Page 273: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 41 RS232 BOARD PARTS LOCATOR...
Page 275: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 43 8300 POWER SUPPLY PARTS LOCATOR...
Page 284: ...6 52 TECHNICAL DATA ORBAN MODEL 9400 DSP BOARD PARTS LOCATOR DRAWING 32170 000 14...
Page 292: ...6 60 TECHNICAL DATA ORBAN MODEL 9400 DISPLAY BOARD PARTS LOCATOR...
Page 293: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 61 DISPLAY BOARD...