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OPTIMOD
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.
Inject the Left Input with a level of +20dBu at 1kHz.
G)
Measure and verify THD+N is below 0.01% from 30Hz to 20kHz (0.005% typi-
H)
cal).
Disconnect the THD analyzer from the Left Monitor (output) XLR connector, and
I)
connect to the Right Monitor (output) XLR connector.
Repeat the above measurements for Right Monitor (output) XLR connector.
J)
Disconnect the oscillator and THD analyzer from the 6200.
K)
8. Verify Digital Receiver and Transmitter Sync.
Verify 6200 software controls are set to their default settings. (Refer to page 4-9.)
A)
Press
B)
Setup
Press
C)
IO CALIB
Press
D)
DIG IN CALIB
E)
Set
to digital: Press
INPUT
then release the
Press
F)
Escape
G)
Set
DO SYNC
external, then release the
H)
Connect the digital source generator to the AES/EBU Digital Input XLR connector
of the 6200.
Inject the Digital Input with a sample rate of 32kHz, 44.1kHz and 48kHz. As the
I)
input sample rate changes, also change the DO RATE to match the input sample
rate: Press
DO RATE
lease the
DO RATE
View TP606 (FSYNC) on Channel 1 of an oscilloscope, then view TP610 (SYNC
J)
INPUT) on Channel 2 of an oscilloscope. Verify that both signals are synced to-
gether at all sample rates.
Set
K)
DO SYNC
internal, then release the
Verify that both signals are not synced together at any combination of sample rates
L)
and
DO RATE
sample rate, then release the
Disconnect the digital source generator from the 6200.
M)
button to re-access Setup menu.
soft key to access I/O CALIB menu.
soft key.
INPUT
soft key.
INPUT
, then press the
DIG OUT CALIB
to external: Press
DO SYNC
DO SYNC
soft key, use the control knob to select a sample rate, then re-
soft key.
to internal: Press
DO SYNC
DO SYNC
settings: Press
DO RATE
DO RATE
soft key, use the control knob to select digital,
soft key.
soft key, use the control knob to select
soft key.
soft key, use the control knob to select
soft key.
soft key, use the control knob to select a
soft key.
4-13
MAINTENANCE
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