27
© Tieline Pty. Ltd. 2015
Genie Distribution User Manual v1.6
6. Use the up
and down
arrow buttons to highlight and select the audio channels.
7. Use the left and right arrow buttons to adjust the levels for both inputs up or down
simultaneously.
8. Press the
RETURN
or
HOME
buttons to exit the screen.
Important Note:
·
To gang channels quickly press
and press and release the right arrow button to
open the
Input Audio
Level
adjustment screen and follow the preceding instructions.
Intelligent Gain Control (IGC)
The codec's inbuilt DSP limiter automatically takes care of any instantaneous audio peaks that
occur in demanding broadcast situations.
Input IGC
(Intelligent Gain Control) is enabled by default
and is automatically activated at +20 dBu (G5 audio scale) and +14dBu (G3 audio scale) to prevent
audio clipping.
There are three settings;
Auto
,
Fixed
and
Off
. If
Auto
is configured the codec will detect when
incoming audio levels have reduced sufficiently and automatically return input levels to the gain
setting prior to IGC being activated. The codec takes just 250 milliseconds to detect audio levels
have returned to normal (after
IGC Level
has been initiated) and will return the levels to the previous
setting within half a second. This response is linear.
To adjust this setting in the codec:
1. Press the
SETTINGS
button.
2. Navigate to
Audio
and press
.
3.
Navigate to
Input IGC
and press
.
4. Select the channel you want to adjust and
press
.
5. Navigate to the preferred setting and
press
.
Configure Audio Reference Metering when Connecting to Tieline G3 Codecs
New generation Genie, Merlin and Bridge-IT IP codecs have more audio headroom than Tieline G3
audio codecs, therefore the audio metering reference scale needs to be adjusted when connecting
to a Commander or i-Mix G3 codec with one of these codecs. The G3 metering scale is between -
11dBu and +18dBu. Tieline codecs perform this metering adjustment automatically when they
connect to each other or this can be programmed to occur by default.
1. Press the
SETTINGS
button.
2. Navigate to
Audio
and press
.
3. Navigate to
Ref Level
and press
.
4. Select
Tieline G3
and press
.
Audio levels should average around the nominal 0vu point and audio peaks should not exceed
+16dbu as indicated by the PPM meter.
