Campbell Scientific RF300-Series DRL VHF/UHF Radio Transceivers - Manual (Page 56)

APPENDIX H. RF300 RADIO SPECIFICATIONS
H-4
TABLE H-3. RF300 Radio Specifications - Loader Board
TRANSMIT
Transmit Current
Adds no more than 27 mA to transceiver Transmit current.
Audio Response
Wide Band Input
DC Coupled
+1/-3 dB from DC to 5 kHz (referenced to 1 kHz)
AC Coupled +1/-3 dB from 1 kHz to 5 kHz (referenced to 1 kHz)
Wide Band Output Bias
DC Coupled
2.5V DC
±
1% temp compensated to
±
100 mV.(Must be supplied to
Tx/Rx)
AC Coupled 2.5V DC
±
1% temp compensated to
±
100 mV.(supplied in Tx/Rx,
internally set)
Narrow Band Input
FSK Input
+1/-3 dB from 65 Hz to 2.5 kHz (referenced to 1 kHz) -30
dB/octave above 3 kHz
Audio Input +1/-3 dB from 6 dB/octave pre-emphasis from 300-3000 Hz
(referenced to 1 kHz (per TIA/EIA-603)) -42 dB/octave above 3
kHz.
Narrow Band Input Bias
FSK or Audio
2.5V DC
±
1% temp compensated to
±
100 mV.(supplied in Tx/Rx,
internally set)
Modulation Capability
Wide Band Input
See transmitter specifications
Narrow Band Input Adjustable, factory preset for 60%
±
10% maximum rated system
deviation with a 400 mV RMS, 1 kHz input.
Audio Distortion <= 5% with 1 kHz tone at 60% maximum rated system deviation
Audio Input Impedance
Wide Band Input
>= 40 k Ohms
Narrow Band Input >= 40 k Ohm or 600 Ohm, programmable
RECEIVE
Current Drain
Adds no more than 27 mA to transceiver receiver current
Carrier Detect
Attack Time
Within 2ms of receiving an RF signal 20 dB greater than an RF
signal which produces at least 25 dB SINAD before squelching.
Dynamic Range 30 dB minimum -116 to -86 dBm
Audio Response
DC Coupled
+1/-3 dB from DC to 5 kHz (referenced to 1 kHz)
AC Coupled +1/-3 dB from a 7 dB/octabe pre-emphasis curve from 300-3000
Hz referenced to 1 kHz (per TIA/EIA-603) - 18 dB/octave above 3
kHz
Output Load
Wide Band Output
Load > 10k ohm
Narrow Band Output Load > or = 600 ohm
Output Level
Wide band Output
100-200 mV RMS
±
5% over voltage and temp variation
Narrow band Output 200-1600 mV RMS
±
over voltage and temp variation at
±
60%
max system dev, 1 kHz tone
Distortion, Narrow/ Wide band
Output < or = 5% with 1 mB RF input.
Overload < or = to 10 % with RF input > or = to1 mV and < or = to 100 mV