4-12
MAINTENANCE ORBAN
MODEL
9400
previous tests may fail to detect faults in certain DSP chips. To verify that all of
the DSP chips are working correctly:
a)
Connect the oscillator to both 9400’s analog inputs.
b)
Navigate to
S
ETUP
>
T
EST
and set the 9400’s operating mode to
O
PERATE
.
c)
Recall the
G
EN
M
ED
preset.
d)
Set the oscillator’s frequency to 400 Hz and its output level to create 10 dB
of gain reduction as indicated on the
AGC
M
ASTER
gain reduction meter.
e)
Connect the N&D test set to the 9400’s left Analog Output #1.
f)
Navigate to
S
ETUP
>
IO
C
ALIB
>
O
UTPUT
>
A
NALOG
1
>
S
OURCE
and set the
9400’s left Analog Output #1 to emit the analog AM signal.
g)
Verify that combined noise and distortion are below 0.1%.
h)
Repeat steps (f) and (g) for the right Analog Output #1.
i)
Navigate to
S
ETUP
>
IO
C
ALIB
>
O
UTPUT
>
A
NALOG
1
>
S
OURCE
and set the
9400’s left Analog Output #1 to emit the digital radio AM signal.
j)
Verify that combined noise and distortion are below 0.1%.
k)
Repeat steps (i) and (j) for the right Analog Output #2.
9.
Return OPTIMOD-AM to service.
A)
Remove the 600
resistors connected across the outputs.
B)
Restore your normal operating parameters, using the notes you made in step
(1.B) on page 4-7.
C)
Navigate to
S
ETUP
>
T
EST
>
M
ODE
and choose
O
PERATE
.
D)
Recall your normal operating preset.
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...