3-DRX
SECTION 2
INSTALLATION
After unpacking the 3-DRX check for physical damage to the unit due to shipping. If
there is any problem with the unit please contact the factory immediately and notify the
carrier of the damage.
The inputs for the 3-DRX are XLR or BNC type with selectable terminations. The
selections are 75 Ohm, 110 Ohm, or bridging. Appropriate cable for digital audio should
be used. Shielded pair wire should be used to connect to the AES-3 inputs or coax
connected to the BNC inputs.
The outputs for the 3-DRX are AES-3
OR
AES-3ID. Only one output should be used at a
time. Select the appropriate output by switching SW-3 #4 ON for AES-3ID (the BNC) or
OFF for the AES-3 (XLR) output you are planning to use. SW-3 #3 provides a switchable
110 Ohm termination for the “SYNC” input.
The 3-DRX
analog
inputs are high impedance, balance bridging inputs with pin 2 as
“hot”. Levels up to +24 dBu can be accommodated. The 3-DRX operates at a fixed bit
depth of 24 bits however the sampling rate is rear panel selectable via the first two
switches on SW-3. Select the desired sampling rate from the following table:
SW-3 #1
SW-3 #2
32 kHz
ON
ON
44.1 kHz
OFF
ON
48 kHz
ON
OFF
EXT SYNC
OFF
OFF
The “SYNC” can be from another serial digital source or paralleled with either the Source
1 or Source 2 inputs. This allows the A/D converter to be synchronized with an external
source.
The remote I/O connector is multi-functional (see remote I/O connector diagram). This
connector provides relay closure output indicating which source is active. It also
provides an open collector output indication of operating mode (Automatic or Manual).
This port also is used for connection to an RS-232 terminal such as a PC running
“Hyperterm” or other such “dumb terminal” mode. The connection is at 9600 baud, 8 bits,
no parity, one stop bit, no handshaking. If an RS-232 is attached to the 3-DRX then no
other inputs or outputs (other than the relay outputs) should be connected to the unit.
The 3-DRX can also be accessed via a modem attached to this port as well.
NOTE: The 3-DRX determines if there is an RS-232 serial terminal attached to the
remote control I/O port on power-up. A terminal should not be attached after
power-up as doing so will interfere with normal operation of the 3-DRX.
