Orban OPTIMOD 6200, Operating Manual

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4-14
MAINTENANCE Orban Model 6200
9. Test Digital Receiver Sample Rate Lock.
A) Verify 6200 software controls are set to their default settings. (Refer to page 4-9.)
B)
Press
Setup
button to re-access Setup menu.
C)
Press
I/O CALIB
soft key to access I/O CALIB menu.
D) Press DIG IN CALIB soft key.
E) Set INPUT to digital: Press INPUT soft key, use the control knob to select digital,
then release the
INPUT
soft key.
F) Connect the digital source generator to the AES/EBU Digital Input XLR connector
of the 6200.
G)
Inject the Digital Input with a sample rate of 32kHz, 44.1kHz and 48kHz. Use 24-
bit words.
H) Measure the frequency of the AES/EBU receiver at TP614. Verify that the meas-
ured frequency corresponds with the input sample rate.
I) Connect AES/EBU digital source to Sync XLR Input connector and repeat steps 9-
C through 9-H using TP618 to verify sample rate lock.
J)
Disconnect the digital source generator from the 6200.
10. Test Digital Transmitter Sample Rate.
A) Verify 6200 software controls are set to their default settings. (Refer to page 4-9.)
B) Press Setup button to re-access Setup menu.
C)
Press
IO CALIB
soft key to access I/O CALIB menu.
D)
Press DIG IN CALIB soft key.
E)
Set
INPUT
to digital: Press
INPUT
soft key, use the control knob to select digital,
then release the
INPUT
soft key.
F)
Change the DO RATE to 32kHz, 44.1kHz and 48kHz, and verify that the frequen-
cies measured at TP606 (FSYNC) follow the chart below within given tolerances:
Press
DO RATE
soft key, use the control knob to select a sample rate, then release
the
DO RATE
soft key.
Sample Rate Tolerance (PPM) Tolerance (Hz)
32kHz 50 PPM ±1.60 Hz
44.1kHz 100 PPM ±4.41 Hz
48kHz 50 PPM ±2.40 Hz
11. Check frequency response of Digital I/O
A) Verify 6200 software controls are set to their default settings. (Refer to page 4-9.)
B) Press Setup button to re-access Setup menu.
C)
Press
IO CALIB
soft key to access I/O CALIB menu.