Orban Optimod-FM 8300 Operating Manual page 201

OPTIMOD-FM DIGITAL
6. Test Digital Sample Rate Converter (Receiver).
A) Verify 8300 software controls are set to their default settings. (Refer to page
4-7.)
B) Be sure you are still in B
C) Navigate to S
D) Set the I
NPUT
E) Connect the digital source generator to the AES3 Digital Input XLR connector
of the 8300.
F) Set the frequency of the digital source generator to 400 Hz and its output
level to 6 dB below full scale.
G) 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.
H) Listen to the analog outputs of the 8300 and verify that the output sounds
clean and glitch-free regardless of the input sample rate.
I) Leave the digital source generator connected to the 8300.
7. Test Digital Sample Rate Converter (Transmitter).
A) Connect an AES3 analyzer (like the Audio Precision System 2) to the 8300's
AES3 digital output.
B) Set the sample rate of the digital source generator to 48 kHz.
C) Navigate to S
D) Change the D
verify that the frequencies measured at the 8300's AES3 output follow the
values in the chart below within given tolerances:
Sample Rate
32.0 kHz
44.1 kHz
48.0 kHz
88.2 kHz
96.0 kHz
E) Disconnect the digital source generator from the 8300.
8. Test the 8300's stereo encoder.
A) Connect an accurate stereo monitor like the Belar FMMS-1 ("Wizard") stereo
demodulator to the 8300's C
This is labeled
8300's rear panel.
mode [see step (3.F)].
YPASS
/ D I C .
ETUP IG N ALIB
to D .
IGITAL
.
/ D O C
ETUP IG UT ALIB
to 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz, and
R
O ATE
Tolerance (PPM)
100 PPM
100 PPM
100 PPM
100 PPM
100 PPM
OMPOSITE
and appears on a BNC connector on the
C O
OMPOSITE UT
Tolerance ( Hz)
O 1.
UTPUT
MAINTENANCE
±3.20 Hz
±4.41 Hz
±4.80 Hz
±8.82 Hz
±9.60 Hz
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