User's Manual

TRM-300 / Integration guide
F070033PT_5.1_en
Page 26 of 26
en
12.5 RF EXPOSURE AND SAR REQUIREMENTS
Under Industry Canada regulations and FCC rules, this radio transmitter may only operate using an antenna
of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada or FCC. To reduce
potential radio interference to other users, the antenna type and its gain should be so chosen that the
equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful
communication.
The antenna used for this transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
 For D288Y21NxPT model, when used with an 8 dBi gain antenna must be installed to provide a
separation distance of at least 25 cm (10 in.) from any person(s) during normal operation in order to
comply with the FCC or IC RF exposure requirements.
Failure to observe these restrictions will result in exceeding the FCC or IC RF exposure limits.
All the instructions detailed in this manual must be followed in order to ensure compliance with SAR and RF
exposure limits.
Users can obtain Canadian information on RF exposure and compliance at the Industry Canada RSS-102
standard text.
The following label will be placed in conspicuous view on the TRM-300:
TRM-300 is restricted to occupational/controller use to safety RF energy exposure
limits. This radio is NOT authorized for general population.
Use only accessories, batteries and antennas approved by PowerTrunk Inc.
Use of non-approved accessories, batteries and antennas may exceed RF energy
exposure limits and/or occupational SAR values.
12.6 EXTERNAL INTERFACE SPECIFICATION
The next table summarizes the technical parameters for interfacing external data sources to TRM-300
terminal.
Port Type
Connector
Load specification
Radio frequency
Antenna connector
Impedance: 50 ohms
Audio input (PCM)
Auxiliary connector
Hi-Z, Digital 0 - 3.3 Volts.
Audio output (PCM)
Auxiliary connector
Hi-Z, Digital 0 - 3.3 Volts.
Data port (UART)
Auxiliary connector
Hi-Z, Digital 0 - 3.3 Volts.
Maximum data rate 115200bps