Telos Zephyr, User Manual

Page: 133 / 258

Section 8 DETAILED MENU REFERENCE 133
analog and digital audio outputs are simultaneously available.
Zephyr’s AES/EBU digital input/output interface module provides maximum flexibility
for connection to digital studio equipment. Sample rate conversion is possible on both
input and output paths, with support for external sample rates
of 32kHz, 44.1kHz, and 48kHz.
The interface may accept clock from an external source and may provide clock when
required. On the input side, sample rate conversion is normally used and may
accommodate a source clock frequency of 32kHz, 44.1kHz, or 48kHz. A special mode
permits bypass of sample rate conversion when it is desirable to synchronize source
equipment to the network clock. Zephyr does not have a dedicated clock output, but
the internal AES/EBU transmitter (which is locked to Telco clock and output at 32kHz
and 48kHz) can be used as a “master” clock source.
Selection of AES/EBU input sampling rate is accomplished by choosing the
item in the UTILITY menu and using the <NO (- )> button to change the mode
displayed. The <YES (+)> button must be pressed to accept and store your selection.
Available modes are:
•
NO (ANALOG)
When this mode is selected, the AES/EBU input is defeated and the analog audio
input is used.
•
S/R CONVERT
When this mode is selected, the AES/EBU input is active. The sample
rate is converted to match the sample rate selected in the RATE menu item. Possible
selections are 32kHz or 48kHz when using Layer III and 48kHz when using Layer II.
The analog input is defeated.
•
SYNC TO NET
When this mode is selected, the AES/EBU input is active. The AES/EBU digital
audio input must be externally synchronized to the clock provided by the AES/EBU
digital audio output signal. Operation is possible at 32kHz or 48kHz when using
Layer III or at 48kHz when using Layer II.
The analog input is defeated.
HOT TIP
Be certain the your audio input is synchronized to the network
clock. To accomplish this, you need to take the clock from
Zephyr’s AES/EBU output and synchronize your equipment to
that clock. 44.1kHz is not available in this mode.