7700 MultiFrame Manual
7707MTA-HD Multi-Signal HD/SD, AES, and Control Fiber Transmitter
Revision
1.3
Page-19
4.2.11. Selecting AES Sample Rate Conversion
Audio must have a sample rate of 48KHz, and be synchronous to video for embedding. To accommodate
other input audio sample rates, or asynchronous signals, the 7707MTA-HD provides sample rate
conversion. Sample rate conversion should be turned on for normal operation, however, Dolby-E audio
uses a proprietary encoding scheme that is not compatible with sample rate conversion; it should be
disabled for Dolby-E. Note that Sample Rate Conversion adds 3.2ms audio latency when enabled. To
enable or disable sample rate conversion, select the
CTRL
(Control) menu item in menu level 1, followed
by the
AES1, AES2, AES3,
or
AES4
(Audio Inputs 1 through 4) and
SRC
(Sample Rate Convert) menu
items.
CTRL
AES1 – AES4
SRC
ON
OFF
ON
Enable sample rate conversion
OFF
Disable sample rate conversion
4.2.12. Selecting the Audio Delay
Audio may be delayed with respect to video in addition to the 7707MTA-HD’s inherent latency by up to 42
ms. To set the audio delay, select the
CTRL
(Control) menu item in menu level 1, followed by the
AES1,
AES2, AES3,
or
AES4
(Audio Inputs 1 through 4) and
DLY
(Delay) menu items.
CTRL
AES1 – AES4
DLY
0 – 42ms
0-42
Audio delay in milliseconds
4.2.13. Selecting the Serial Data Type
The serial data interface of the 7707MTA-HD is configurable as RS-422, RS-232, or RS485. To select the
data type, select the
CTRL
(Control) menu item in menu level 1, followed by the
SER
(Serial Data),
followed by the
TYPE
(Data Type).
CTRL
SER
TYPE
232
422
485
232
Configures card to transmit RS232
422
Configures card to transmit RS422
485
Configures card to transmit RS485
