Advanced Wireless Communications AWR-ERM100, Руководство пользователя

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time. Separate speaker and auxiliary outputs allow either de-emphasized voice or flat data output. A carrier detect output is pulled high when the channel is busy.
Alternately, the MON ITOR input can be used as a carrier and tone detector output.
A dual colored LED appears on the edge of the board. It has the following functions:
Bright RED while transmitting Bright GREEN when carrier is present on channel,
INSTALLATION
The antenna should be installed in a location to minimize radiation to the AWR-ERM100 board and DB-20 connector harness. Antenna positioning is also important in
minimizing interference to the receiver. PCs and motors are notorious producers of electrical noise. In a noisy environment the receiver squelch level can be raised to
avoid unwanted spurious reception.
To maximize transmission power, the power supply cable should be of sufficient gauge to minimize voltage drop. Measuring the voltage between pin 5 and pin 15 on
the DB-20 connector while transmitting will show the actual radio voltage. For higher duty transmitter cycles, heating of the board should be considered. An external heat
sink can be added to the bottom of the board only version using the two mounting holes on both sides of the RF PA shield. On the shielded board model the shield will
help heat sink the unit. On the encased model the heat is conducted out of the aluminum end cap opposite the connectors. When transmitting with higher duty cycle
usage at elevated ambient temperatures, without heat sinking, the internal board heat may push the reference oscillator Y301 temperature higher than the 60 ºC
specified limit for 2.5 ppm (VHF) or 1.5 ppm (UHF) operation. Some form of additional cooling may be employed to avoid this situation.
SUB D 20 PIN CONNECTOR
The AWR-ERM100 is equiped with a 20 pin female sub D connector with the following functions:
Pin# Function
1 Least significant channel select bit (CS0)
2 Channel select 1 (CS1)
3 Channel select 2 (CS2)