User manual

ADCP-75-154 • Issue 3 • August 2006
Page 17
© 2006, ADC Telecommunications, Inc.
5.2 DD900 Full Band Masthead Unit
Table 2 provides typical specifications for the DD900 Masthead Unit.
Table 2. DD900 Full Band Masthead Unit
CATEGORY PARAMETER SPECIFICATION
ELECTRICAL
Nominal impedance of RF input and outputs 50 Ohm
Frequency Range
TX 925–960 MHz
RX 880–915 Mhz
Duplex Filter Bandwidth 35 MHz
Passband (RX)
Gain 12 dB
Noise Figure 1.4 dB typical
Dynamic Range
Input at 1 dB compression +3.0 dB
IIP3 +15 dBm
Insertion Loss of TX Path (TX to Antenna) 0.2 dB
FILTER
Passband Return Loss
TX Band 18 dB
RX Band 18 dB
Intermodulation –115dBm
POWER
Operational Voltage 7 to 15 VDC
Operational Current
140 mA
± 10 mA
Alarm Current Level
350
± 10 mA
PHYSICAL
Dimensions (HxWxD) 332 x 250 x 83 mm
Weight 6.6 kg
Color Silver
Housing Aluminum
ENVIRONMENTAL
Operating Temperature
–40
° C to +65° C
Outdoor Protection IP65
QUALITY
MTBF < 500,000 hours
Lightening Protection IEC 801-5 and IEC 1312