Crystal Vision
Installation
TANDEM-110 User Manual R1.8
81
07/07/2010
Using monitoring outputs
TANDEM-110 has a dedicated audio monitor router that monitors the connection
between each option card and the main router. One output is converted to a balanced
stereo signal and is fed to the card edge headphone socket. The same output can also be
made available at the rear connector by enabling the ‘Monitor Bus’. The following stereo
audio signal sources may be selected:
8 router feeds to output sub-PCB cards; I1+2, I3+4, J1+2 and J3+4, if available
8 direct input sub-PCB card outputs; G1+2, G3+4, H1+2 and H3+4, if available
The analogue output is a four wire connection; each wire carries Left+, Left-, Right+, and
Right-, which form two balanced line drivers. The '+' and '-' outputs each being true and
complimentary (inverted) drives from each signal source.
If enabled the analogue monitoring audio four-wire circuit is connected to the 26 way
high density connectors or the rear extension of the rack frame, and also to extra pins on
the RM04.
A number of TANDEM-110, TANDEM-200 and Demon modules may be wired to a
shared pair of active loudspeakers. Audio levels to be monitored via the analogue bus or
using headphones should not 10 VU (-8 dBFS) or overload distortion may occur.
When 'OFF' is selected, the Bus goes high impedance. Should two or more TANDEMs be
selected as 'Bus ON' when there are multiple TANDEMs sharing common active
loudspeakers, the audio will be the sum of all channels set to ON. In this case the output is
likely to suffer distortion at high signal levels.
TAD202 has a dedicated analogue audio bus output, which can NOT be switched to a
high impedance state. TAD202 can not share the same analogue bus connections as
TANDEM-110, TANDEM-200, & Demon.
