User Manual

Model 2440 Functional Block Diagram
Receiver Low Noise Amplifier (LNA)
Receive Gain:
Freq Response:
Noise Figure:
16 dB nominal
+/-1 dB over operating range
4 dB typical
Operating Range:
Operating Mode:
Connectors:
Indicators:
Lightning
Protection:
DC Surge
Protection:
2400-2483 MHz
Bi-directional, half-duplex. Senses RF
carrier from transmitter and
automatically switches from receive to
transmit mode.
N-female
TX and RX LEDs on both the amplifier
and the DC bias injector
Direct DC ground at antenna connector.
DC injector serves as lightning arrestor
if properly grounded.
600 Watt TVS at 12 VDC input from
transmis
2.1 General Specifications
Transmitter Amplifier
Transmit Gain:
Freq Response:
Transmit Output
Power:
Duty Cycle:
Transmit Input
Power to Amp:
14 dB nominal for standard amp
(Other versions may have different gains)
+/-1 dB over operating range
250 mW nominal
Up to 640 mW for FHSS radios
Up to 400 mW for DSSS radios
50% Maximum
3mW minimum (+5dBm),
100mW (20 dBm) maximum
(Special versions are available with higher
input power.)
Mechanical, Power and Environmental
Operating
Temperature:
Power:
Dimensions:
Mounting Bracket
for amplifier:
Kit Weight:
-20°C to +60°C
105-240 VAC if using the power
supply provided with the amp kit
or
11 – 14 VDC @ 900 ma peak,
400 ma avg. with an alternate
power source
Amplifier:
4.5” x 2.6” x 1.2 ”
DC Power injector:
5.4”
X 2.4” X 1.3 ”
Accommodates pole/mast
diameters
from 3/4” to 3”
Approx. 1.5 lb. with U-bolts
View showing the DC Injector and the
pole mounted outdoor amplifier
attached to its mounting bracket.
Page 2Page 13
Authorized Cables with Minimum Lengths
NOTE: This table is for reference only. In order to comply with FCC Part 15
Certification, the installer must insure that actual coax cable used
between the DC injector and the amplifier has at least 3.3 dB of
insertion loss.
Caution: If the power output from the amplifier exceeds +24 dBm or
the antennas used are in excess of 24 dBi gain, the FCC
regulatory limits specified in Part 15.247(b)(3)(i) could be
exceeded.
NOTE:
1. MPE distance figures are based on a conservative “worst case” prediction, i.e.
+24 dBm into antenna using formula S=EIRP/(4piR2) and no calculaton for duty
factor. In practice the minimum distance will be much shorter.
2. The minimum MPE distance has been calculated for the maximum allowed
Power Density (S) limit os 1.0 mW/cm2 in the Frequency range 1500 - 100,000
MHz for uncontrolled environments (Ref. 2).
Reference:
1. FCC Part 15, sub-clause 15.247 (b)(4)
2. FCC OET Bulletin 65, edition 97-01
3. FCC Supplement C to OET Bulletin 65, edition 97-01
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