Excessive Sibilance ("Ess" Sounds); System Will Not Pass Line-Up Tones At 100% Modulation; System Will Not Pass Emergency Alert System ("Eas" Usa Standard) Tones At The Legally Required Modulation Level; System Receiving 6300'S Digital Output Will Not Lock - Orban OPTIMOD 6300 Operating Manual

5-4
TROUBLESHOOTING

Excessive Sibilance ("ess" sounds)

System Will Not Pass Line-Up Tones at 100% Modulation

System Will Not Pass Emergency Alert System ("EAS" USA Standard) Tones at the
Legally Required Modulation Level

System Receiving 6300's Digital Output Will Not Lock

AES Channel Status Bits Will Not Set the 6300 to Stereo or Dual-Mono Mode

Equipment Receiving the 6300's AES Output Changes Operation Mode Unexpectedly

Loudness Does Not Change When your adjust the Output Level Control

In applications where you are protecting a pre-emphasized link, if the 6300's output
is set to F in S
LAT YSTEM
supplied somewhere else in the system. This will cause very dull sound.
If "ess" sounds in speech (particularly with women's voices) seem too pronounced,
set the B5 T
HRESHOLD
brightness of music, so a careful compromise is usually required.)
This is normal. Sine waves have a very low peak-to-average ratio by comparison to
program material. The processing thus automatically reduces their peak level to
bring their average level closer to program material, promoting a more consistent
and well-balanced sound quality.
The 6300 can generate test tones itself. The 6300 can also be put into Bypass mode
(locally or by remote control) to enable it to pass externally generated tones at any
desired level. (See Test Modes on page 3-63.)
See System Will Not Pass Line-Up Tones at 100% Modulation (directly above) for an
explanation. These tones should be injected into the transmitter after the 6300, or
the 6300 should be temporarily switched to B
Be sure that the sample rate at the 6300's output is set to match the sample rate
that the driven system expects. (Use the DO1 RATE or DO2 RATE control as appropri-
ate.) Be sure that the 6300's output mode (AES3 or SPDIF) is set to match the stan-
dard expected by the driven system.
Be sure that the equipment driving the 6300 is set in AES3 or AES/EBU mode. (SPDIF
will not work.) Similarly, you must set the 6300's digital output mode (via the DO1
FORMAT or DO2 FORMAT control) to AES in order to send AES channel status bits to
downstream equipment.
Some equipment will respond incorrectly to AES Channel Status and/or User Bits. Try
turning both of these off in the 6300. (See step 21 on page 2-18 and step 22 on page
2-19.)
The output you are trying to adjust may have been set accidentally as the
R S . This setting is only correct when want the transmission channel's
EFERENCE OURCE
loudness to be constrained to a level set by the D
most audio-only applications, set the R
S > O
ETUP UTPUT , there will be no preemphasis unless it is
control more negative. (Note that this will also reduce the
EFERENCE
to pass the tones.
YPASS
R
IALNORM EFERENCE
S to O
.
OURCE FF
ORBAN MODEL 6300
control. For