9
when the jumper is in the
position. Fine adjustment of the in-
put level to the processor is made using the front-panel menu. (See
Page 13).
Jumper positions for most
studio-line-level inputs.
Jumper positions for lower-level,
consumer-type equipment.
Figure 2 -
Analog Input Gain Range Jumpering
LINE OUTPUTS
Analog and digital outputs are available concurrently.
Digital Output
The rear-panel
AES/EBU DIGITAL I/O OUTPUT
is an XLR-male
connector delivering an electronically-balanced (transformerless)
digital signal. When the 261 is fed with a digital input, this output
will assume the same sampling rate. When the 261 is fed left-and-
right analog inputs, the output sampling rate is selected by the
front-panel menu. (See Page 12)
Left and Right
Analog Output
Connections
Analog program line outputs are rear-panel male XLR connectors.
These are true active-balanced outputs with a symmetrical resistive
source impedance of 200 ohms. The nominal 0VU output line
level may be adjusted between 15dBu and +10dBu with the front-
panel menu and buttons. (See Page 13)
If the 261 is connected to feed single-ended (unbalanced) equipment,
connect the center conductor of the shielded interconnect lead to Pin
2 of the XLR connector and the shield both to Pin 1 and to Pin 3.
ALARM TALLY OUTPUTS
The 261 has rear-panel alarm tally outputs for three program au-
dio fault conditions: 1)
INPUT OVERLOAD
, 2)
AGC RANGE LIMIT
and 3)
PROGRAM LOSS
(silence-sense). These alarms are coinci-
dent with front-panel alarm indications, which are covered under
the corresponding discussions of processor operation.
The alarm outputs are NPN transistor saturations to ground. These
outputs can sink up to 100mA at source voltages up to about
30VDC. +5VDC and ground (
+5V
and
GND
) are provided on the
terminal strip as well. The +5V source is current-limited at about
10mA, but is sufficient to drive an opto-coupler or a remote LED in-
dicator. The alarm tally barrier strip may be unplugged from the
chassis to facilitate connection.
