User Manual
Transceiver Module TC695
Page 8 / 6
UM-TC695-V1-0.DOC [ Word 2000 ] sedh/dous
HBC-radiomatic GmbH • 74564 Crailsheim • Germany
2004-12-15
Information and specifications subject to change without notice.
www.hbc-radiomatic.com
Technical Data
Common data (RX+TX):
Frequency range: 902.025 ... 918.000 MHz
Operating voltage: 5.6 ... 7.2 V
Channel pattern: 25 kHz
LF transmission bandwidth: 150 Hz .... 4.8 kHz
Modulation type: F9D
Operating temperature range: -30 ... +70 °C
Transmitter:
Output power: +10 dBm
Frequency deviation: +/- 5 kHz
Current consumption when transmitting: 140 mA
Switch-over time (RX-TX): < 300 µs
Receiver 1 (traffic channel receiver):
Sensitivity: -107 dBm (20dB S/N)
First IF: 45 MHz
Second IF: 455 kHz
Current consumption when receiving: 75 mA
Switch-over time (TX-RX): < 300 µs
LF output voltage: 150 mV RMS at +/-5 kHz deviation
Receiver 2 (scanner receiver):
Sensitivity: -107 dBm (20dB S/N)
First IF: 21.4 MHz
Second IF: 455 kHz
Current consumption: 20 mA
Measure channel changeover time with field strength < 30 ms
Transceiver operating modes:
Manual
After applying the operating voltage the frequency can be set with the address lines
A0 ... A6 and the unit can be switched over from receive to transmit with the PTT line.
The field strength data of all scanned RF channels is available at TXD (RS232) (can be
displayed with the PC program: Database field strength, dwell time, stored maximum
field strength for each RF channel, installation software on HBC
G: HFE/TC695/TC695.EXE).
Automatic
After applying the operating voltage the transceiver issues its identity code, consisting of
an 8 byte string, every 30 msec to the SPI (MOSI, SS and CLK). The default data
transmission rate is 125 kBit/sec (adjustable up to 1 Mbit/s SW). The default data
receiving rate is up to 1 Mbit/sec. After the first valid response to the cyclic transmission
of the ID code the transceiver only reacts to a request from the other end. Time between
request and response to the SPI about 300 µSek.
