Orban OPTIMOD 6200, Руководство по эксплуатации

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OPTIMOD MAINTENANCE
4-13
E) Connect a THD analyzer to the Left Input XLR connector. Set the THD analyzer's
bandwidth to 22kHz.
F) Connect the oscillator to the Left Input XLR connector.
G) Inject the Left Input with a level of +20dBu at 1kHz.
H)
Measure and verify THD+N is below 0.01% from 30Hz to 20kHz (0.005% typi-
cal).
I) Disconnect the THD analyzer from the Left Monitor (output) XLR connector, and
connect to the Right Monitor (output) XLR connector.
J)
Repeat the above measurements for Right Monitor (output) XLR connector.
K) Disconnect the oscillator and THD analyzer from the 6200.
8. Verify Digital Receiver and Transmitter Sync.
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) Press
Escape
, then press the DIG OUT CALIB soft key.
G) Set DO SYNC to external: Press DO SYNC soft key, use the control knob to select
external, then release the
DO SYNC
soft key.
H)
Connect the digital source generator to the AES/EBU Digital Input XLR connector
of the 6200.
I)
Inject the Digital Input with a sample rate of 32kHz, 44.1kHz and 48kHz. As the
input sample rate changes, also change the DO RATE to match the input sample
rate: Press
DO RATE
soft key, use the control knob to select a sample rate, then re-
lease the
DO RATE
soft key.
J) View TP606 (FSYNC) on Channel 1 of an oscilloscope, then view TP610 (SYNC
INPUT) on Channel 2 of an oscilloscope. Verify that both signals are synced to-
gether at all sample rates.
K) Set DO SYNC to internal: Press DO SYNC soft key, use the control knob to select
internal, then release the
DO SYNC
soft key.
L)
Verify that both signals are not synced together at any combination of sample rates
and
DO RATE
settings: Press
DO RATE
soft key, use the control knob to select a
sample rate, then release the
DO RATE
soft key.
M) Disconnect the digital source generator from the 6200.