Orban OPTIMOD 6200 Operating Manual page 129

OPTIMOD
The ripple and noise should not exceed 50mVp-p.
4. Test Analog ±5 volt supply (Power Supply Board).
Measure the analog +5 volt supply with the DVM. Verify the presence of +5 volts
A)
(±0.25V).
The analog +5 volt supply appears between TP2 and ground test point TP3
on the Power Supply Board.
Using the oscilloscope, measure the total ripple and noise on the +5 volt supply.
B)
The ripple and noise should not exceed 50mV.
Measure the analog −5 volt supply with the DVM. Verify the presence of −5 volts
C)
(±0.25V).
The analog −5 volt supply appears between TP5 and ground test point TP3
on the Power Supply Board.
Using the oscilloscope, measure the total ripple and noise on the −5 volt supply.
D)
The ripple and noise should not exceed 50mV.
5. Check Analog Input Clip Level.
Verify 6200 software controls are set to their default settings. (Refer to page 4-9.)
A)
Press
B) Setup
C) Press TEST soft key to access Test menu.
Recall bypass preset: Press
D)
pass, then release the
Bypass defeats all compression, limiting, and program equalization, but re-
tains MAX LPF
Connect the oscillator to the Left Input XLR connector.
E)
Inject the Left Input XLR connector with a level of +20dBu (matching the
F)
level setting) at 1kHz.
Connect the audio analyzer to the 6200's Left Monitor (output) XLR connector.
G)
H) Verify that the output is +12.6dBu ±1.5dB.
Apply 0dBu to the input of the unit.
I)
Vary the AI CLIP level control from +27.0dBu to +5.0dBu and verify the follow-
J)
ing Left Monitor (output) level readings:
button to re-access Setup menu.
MODE
soft key.
MODE
frequency setting.
soft key, use the control knob to scroll to by-
4-11
MAINTENANCE
AI CLIP