User's Manual

Bronx Justice Centre Radio Repeaters
Handbook Number: 80-283501HBKM Page: 70 of 86
4.4.1 Uplink & Downlink Shelf Description
This 8U shelf holds all the electronics modules for the 800MHz BDA except for the downlink power
amplifier shelf and the PSU shelf. The alarms are a volt-free, relay contact pair, ‘D’ connector pins 1 &
2.
4.4.2 Uplink & Downlink Shelf Electrical Specifications
PARAMETER SPECIFICATION
851-869 MHz (downlink)
800MHz tuned frequency ranges:
806-824 MHz (uplink)
856-861MHz
IF Band select downlink channels:
866-869MHz
811-816MHz
IF Band select uplink channels:
821-824MHz
IF Bandwidths: 3MHz or 5MHz
Gain Adjustment: 0 - 30dB (in 2dB steps)
Uplink Power: >10Watts
Downlink Power: >80-100Watts
AGC: Fitted in all channel selective modules
Noise Figure: <6dB (@ maximum gain)
VSWR: better than 1.5:1
Impedance: 50ȍ
RF Connectors: N type, female
Alarms Fitted:
(‘D’ connector, pins 1 & 2)
1 Amplifiers
4.4.3 Uplink & Downlink Shelf Mechanical Specifications
PARAMETER SPECIFICATION
Height: 8U
Width: 19" (482.6mm)
Shelf:
Depth:
<450mm(excluding heatsinks, connectors,
handles and feet)
operational: -20°C to +60°C Temperature
range:
storage: -40°C to +70°C
Weight: <20kg
Humidity: 5 – 95% non-condensing
RF Connectors: N type female
Environmental protection: IP44
4.4.4 Uplink & Downlink Shelf System Diagram See section 4.3.4