AE02B-A3659 Rev -- DESCRIPTION
CHAPTER 1
DESCRIPTION
1.1 OVERVIEW
The SelectAmp NBPCS-900-3 bi-directional channelized paging repeater provides selective frequency
amplification of user specified frequencies in the 901-902, 930-931 , and 940-941 MHz Narr owband PCS
bands. The unit can be configure d with up to three channe lizers allowing the user to configure the unit to
suit their needs. The channelizers are available in two v ersions: a 930 MHz, 12.5 kHz Bandwidth version
intended for POCSAG/FLEX and a 940 MHz, 50 kHz Bandwidth version intended for ReFLEX. Frequency
selection, gain adjustment and fault monitoring is accomplished with monitor and control circuitry and
firmware.
Within this manual , “F or w a rd Cha nn el ” refers to the RF signal pat h fr om th e ba se sta t i on to t h e page r an d
the “Reverse Channel” refers to the RF signal path from the pager to the base station.
1.2 ELECTRICAL SPECIFICATIONS
Table 1-1 below contains the electrical specifications.
Table 1-1 Electrical Specifications
Parameters Specification
Frequency Range Forward (930) = 928 – 932 MHz.
Forward (940) = 938 – 942 MHz.
Reverse = 897 – 903 MHz.
Composite Output Power Forward = 1 Watt.
Reverse = 500 mWatts.
Output 1 dB Compression Point Forward = 4 Watts.
Reverse = 1.3 Watts.
Power Gain
Fwd Channels
Rev Channel
Third Order Output IP3 Forward = +51 dBm.
50 to 95 dB nominal, adjustable from front panel.
50 to 85 dB nominal, adjustable from front panel.
Reverse = +43 dBm.
Document use is restricted to that described on cover 1-1
AE02B-A3659 Rev -- DESCRIPTION
1.2 ELECTRICAL SPECIFICATIONS (CONT.)
Table 1-1 (Cont.) Electrical Specifications
Parameters Specification
Forward 1 dB Bandwidth:
930 MHz, POCSAG/FLEX Channelizer
940 MHz, ReFLEX Channelizer
12.5 kHz.
50 kHz.
Reverse 3 dB Bandwidth
Group Delay
897 – 903 MHz.
Forward = ≤ 30µs
Reverse = ≤ 2µs
Adjacent Channel Rejection:
930 MHz, POCSAG/FLEX Channelizer
940 MHz, ReFLEX Channelizer
≥ 30 dB @ F
≥ 30 dB @ F
± 12.5 kHz.
o
± 55 kHz.
o
RF Port Impedance 50 ohms nominal.
Maximum Input Signal Without damage -30 dBm with gain set for minimum on all channels.
AC Input Power 100 to 240 VAC, 50/60 Hz, 3A
¼” x 1¼” 240V 3A SLO-BLOW FUSE
Status Front panel indicators.
Remote Fault Monitoring
Contact Closure: Normal = contacts closed (approx 23 Ω).
Fault = contacts open.
Document use is restricted to that described on cover 1-2
AE02B-A3659 Rev -- DESCRIPTION
1.3 MECHANICAL SPECIFICATIONS
Table 1-2 below contains the mechanical specifications.
Table 1-2 Mechanical Specifications
Parameters Specification
Size Amplifier:
Height: 13.3 cm (5.25 inches).
Width: 48.3 cm (19 inches).
Depth: 48.3 cm (19 inches).
Weight Amplifier: 40 lbs (18.2 kg).
Mounting Table top mount (rubber feet included) or
19” Rack Mount (slides optional).
Power Connections AC Power cord supplied with unit.
RF Connections Type N female.
Remote Fault Connection Type RJ-11, Pins 2,3.
1.4 ENVIRONMENTAL SPECIFICATIONS
Table 1-3 below contains the environmental specifications for the Band Selective Amplifier.
Table 1-3 Environmental Specifications
Parameters Specification
Temperature Range (Operating)
Humidity Range (Operating) 10% to 90% non-condensing.
Environmental Protection None.
Operating: 0° to +50°C
Storage: -20° to +70°C.
1.5 TECHNICAL ASSISTANCE
Technical assistance on this or any other Andrew product is available 24 hours per day through:
Andrew Customer Service
Telephone: 1-800-255-1479
Fax: 1-972-952-0019
Document use is restricted to that described on cover 1-3
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