Data Sheet

QPRO Technical Data Sheet
Document 1137-0901, REV K 26
57600 bps.
• GSM Serial Port – RS-232 3-wire can be used on QPRO models which include the GSM feature for
firmware updates. For QPRO models that do not include the GSM feature this port can be used by
the application directly.
4.1.5.1 MTS
The following RS-232 lines are available for the MTS port: RX, TX, DTR, CD, DSR. The signal names are
from the perspective of the DTE. The interface protocol for this port complies with the RS-232 standard
serial specification.
4.1.5.2 DTR
The DTR line is an RS-232 input that is used in the power supply wake-up circuitry to wake up the QPRO
from sleep mode. In order to wake the QPRO via DTR, a 1.8 Volt rise on the DTR line with a rise time of less
than 100µs is required. MTS_DTR is a software readable digital input. The low and high thresholds are 0.8
volts and 2.0 volts respectively.
NOTE: If DTR is de-asserted, you must wait at least 3.5 seconds before re-asserting the DTR to allow
enough time for a controlled power down sequence to occur.
4.1.5.3 Logger
This RS-232 RX/TX pair is available for a second serial port. This port is named from the perspective of the
QPRO, as it is typically used for logging and debugging activities. See the Q4000/QPRO User’s Manual for
details of the Logger port operations.
4.1.6 Interface Connector Electrical Specification
Note: All lines are protected against over-voltage and transients (see Signal Description Section). The Max
(Min) Nominal Voltage column is intended to provide information about the voltage limits for normal
operation. See the following table for pinout information.
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