TDT RZ2 Manual page 204

5-6
Level
The RM has an internal speaker that is driven by channel 1 output. The Level knob
controls the volume of the speaker and analog channels 1 and 2 when connected to
the 1/8" audio jack labeled OUT. To achieve the full output level specified in your
circuit on these two channels, set the Level knob to Max.
RM1/RM2 Processor Back Panel Features
USB In
The USB input on the RM acts as a USB hub. Multiple RM devices can be ganged
together to increase signal processor power. A standard USB, A to B, cable is
required for setup.
USB Out
The USB output connects either to another RM device, a UB4, or to the host
computer's USB interface. The RM can be connected to PCs with either USB 1.1 or
USB 2.0 hubs.
Digital I/O
The female DB-9 connector allows direct access to the digital inputs and outputs.
Pinout information is provided on the label above the connector. Bits 0 - 3 (which
map to pins 5, 9, 4, and 8 on the male DB-9 connector) are inputs and bits 4
- 7 (which map to pins 3, 7, 2, and 6 on the male DB-9 connector) are
outputs. Ground is labeled G (which maps to pin 1 on the male DB-9 connector).
Note: The digital lines drive about 25 milliamps.
Amplifier (RM2 only)
A fiber optic connector is found on the RM2 for use with the Medusa RA4/RA16
preamplifier, the Loggerhead RA8GA, and the associated headstage assemblies.
Ext. Pow. (External Power)
An external power supply can be used as an alternative to drawing power from the
USB connection. An adapter allowing the device to be powered form an AC power
source is available upon request. A battery with an output range of 6-9 volts, such
as a motorcycle battery, could also be used to power the device.
TDT recommends separate external power sources when using multiple RM devices.
Mobile Processors Digital Input/Output
The Mobile Processors are equipped with 8 bits of programmable digital input/output,
accessed via the Digital I/O 9 pin connector on the back panel. See "RM1/RM2
Processor Technical Specifications" on page 5-9, for a pinout diagram.
RM1/RM2 Mobile Processors
System 3