User`s guide

Chapter 6 ____________________________________________________________ Technical Data
VAISALA ______________________________________________________________________ 133
TM32 Radio Modem
Table 60 TM32 Radio Modem Specifications
Property Description/Value
Interface RS-232 compatible interface. User
configurable for common baud rates to
38,400 and parity. Interface does not
require hardware handshake control.
Power External power supply range of 10 ... 26
VDC.
RF - 1.2W, 10.2W during TX.
Link rate 2400 or 4800 baud (optionally 9600
baud)
Transmission protocols Fast asynchronous, transparent, packet
switched, digipeater, or TDMA.
Modulation Gaussian Minimum Shift Keying (GMSK)
baseband modulation with programmable
transmit BT of 0.5 or 0.3.
FEC protocol Hamming code (12,8) with data interleave
for burst error correction up to 20
consecutive bits in transparent and
packet modes of operation.
General radio specifications Synthesized frequency control. Channel
spacing resolution of 6.25, 12.5 kHz, or
25kHz depending on model. Frequency
stability of 5 ppm.
Transmitter Modulation distortion <5%. Duty cycle
100%. Transmitter attack time 10 ms.
Spurious and harmonic FM -55 dBc. FM
hum and noise -40 dB.
Receiver Sensitivity -114 dBm (12 dB SINAD).
Adjacent channel selectivity -60 dB (25
kHz). Spurious and image rejection -60
dB. Intermodulation -60 dB. FM hum and
noise -40 dB. Conducted spurious -57
dBm.
RF connector Environmentally sealed BNC (50 W)
Type acceptance All models are type accepted and
certified for operation in the U.S. and
Canada.
Operating temperature
-22 ... 140 °F (-30 ... +60 °C)
Storage temperature
-67 ... 185 °F (-55 ... +85 °C)
Vibration/Shock IEC 68-2-55
Enclosure IEC 144/855420 IP 66 Dust-tight and
watertight.
Dimensions w × d × h 70 × 23 × 132 mm (2.75 × 0.9 × 5.2 in)
Weight 255 g (9 oz) excluding cable