TX6n/5n/4n Reference Manual 45
System Connection Examples
■Thru-output for digital connections
For digital connections (the standard AES-IO card), the “thru” output from the [IN] jack to the [THRU] jack will be a signal
that has passed through the buffer if the power is on, or a signal that bypasses the buffer if the power is off.
If the power is on, the signal is regenerated in the buffer, theoretically allowing daisy-chain connection of any number of units.
At this time, a slight latency occurs (40 nsec when operating at 96 kHz), but even if ten units are connected this will be only 400
nsec (a mere 0.14 mm when calculated as a difference in distance).
If the power is off (or if the power will not turn on because the amplifier has malfunctioned), a relay circuit will bypass the
buffer and directly “thru-output” the input signal so that the signal to the daisy-chained amplifiers connected downstream is not
interrupted. At this time, there will be a slight interruption in the sound due to the switching of the relay circuit. (Power-on ➝
off will take approximately 200 ms, and power off ➝ on will take approximately 10 ms.)
■Regarding digital connections
When using a digital connection (the standard AES-IO card), please note the following points regarding connection cables.
•You must use a 110Ω digital cable to make digital connections. Do not use an analog mic cable. Although the same XLR con-
nector as for analog connections is used, take care not to inadvertently connect a digital signal and analog signal.
•A high-quality 110Ω digital cable can be extended to approximately 100 meters when operating at 96 kHz (theoretically to
approximately 200 meters when operating at 48 kHz). However, this length cannot be guaranteed in some cases, due to dif-
ferences in cable quality and the number of connector contacts. Please use cables that are impedance-matched and have min-
imal attenuation through the high-frequency range (12 MHz).
•If you need to extend a digital cable longer than 100 meters, we recommend that you use an impedance conversion connector
to change from the 110Ω XLR connector to a 75Ω coaxial (BNC) connector, and use a 75Ω coaxial video cable to convey the
signal. Even in this case, the signal will be dependent on the quality of the cable, but can usually be extended up to 300
meters.
• As far as possible, connect the digital cable directly to the TXn amplifier itself without routing it through a patch panel on
your amp rack, etc. Routing the signal via a patch panel will make impedance matching more difficult.
• If you want to distribute a digital signal to multiple amplifiers, we recommend that you use the TXn’s “thru” output to make
daisy-chain connections, or distribute it using an external device (such as a digital mixer in which an AES/EBU card is
installed, or a DME series unit). Using a parallel cable to distribute the signal cannot be recommended from the viewpoint of
impedance matching.
DIGITAL (AES/EBU)
THRU IN
RelayRelay
Buffer