Andrew NBPCS-9002W Users Manual

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