INSTALLATION AND OPERATING MANUAL FOR RHBDA-PS8-0.
TABLE OF CONTENTS PARAGRAPH PAGE NO RHBDA OVERVIEW RHBDA BLOCK DIAGRAM DESCRIPTION OPTIONAL EXTERNAL FILTER (Figure 1) RHBDA BLOCK DIAGRAM DRAWING (Figure 2) ELECTRICAL SPECIFICATIONS MECHANICAL CONNECTIONS ENVIRONMENTAL CONDITIONS RHBDA CONNECTIONS MECHANICAL OUTLINE DRAWING (Figure 3) OPTIONAL ALARM CONDITIONS (Figure 3a) RHBDA INSTALLATION RHBDA OPERATION FRONT PANEL ADJUSTMENT (Figure 4) BACK PANEL CONNECTORS (Figure 4a) RF EXPOSURE WARNING DIAGNOSTICS GUIDE Page 2 3 3 3 4 5 6 6 6 7 7 8 9 10 10 11 1
RHBDA OVERVIEW: The RHBDA assembly enhances the coverage area of radio communications in buildings and RF shielded environments. The unit features low noise figure and wide dynamic range. It is based on a duplexed path configuration with sharp out of band attenuation allowing improved isolation between the receiving and transmitting paths. RHBDA BLOCK DIAGRAM DESCRIPTION: Refer to Figure 1 for the following discussion.
Figure 2 1. 2. 4. 5. 3. 6. RHBDA BLOCK DIAGRAM 1. Downlink Filter - has a narrow bandpass and high selectivity. 2. Downlink LNA & Attenuator – 0-30 dB in 2-dB steps of attenuation on the Downlink input signal with a pre-amplifier that has 20 dB gain. 3. Downlink HPA – is a High power amplifier with an ALC circuit which offers 40dB Gain. 4. Uplink Filter - has a narrow bandpass and high selectivity. 5.
ELECTRICAL SPECIFICATIONS: Frequency Range Uplink Downlink : 806-824 MHz : 851-869 MHz System Pass band Gain @ min attenuation Downlink : 60 dB (Typ.) Uplink : 60 dB (Typ.) Variable Step Attenuator Range (2-dB steps) Uplink : 0-30 dB Downlink : 0-30 dB Pass band Ripple : ±1.5 dB (Typ.) Noise Figure @+25°C at max gain Uplink : 5.0 dB (Max.) 3rd Order Intercept point Downlink : +55 dBm (Typ.) *Output Power @ 1dB Compression Downlink : +44 dBm (Typ.
MECHANICAL SPECIFICATIONS: Size : 19.0 x 13.0 x 5.25 inch : (482.2 x 330.2 x 133 mm) RF Connectors : N-Type Female Weight : 23.0 Lbs. (10.45 kg.) approx. ENVIRONMENTAL CONDITIONS: The unit is designed for indoor applications: Operating temperature: - 20°C to + 55°C Storage temperature: - 50°C to + 90°C RHBDA CONNECTIONS The RHBDA Rack AC power is accepted through a standard 3-wire male plug (IEC320) with phase, neutral and ground leads (See Figure 3).
Figure 3 RHBDA Mechanical Outline BASE-IN BASE-OUT MOBILE GND POWER 0...30 dB Gain Adjustment UPLINK 0...30 dB Gain Adjustment DOWNLINK RACK BDA BAND D Figure 3a Conditions for Optional Alarm The alarm monitors current of both uplink and downlink amplifiers. An alarm condition will occur if either uplink or downlink amplifiers are (Relay Shown in Non-Alarm Condition) over or under its current tolerance or if there is no DC power present.
RHBDA INSTALLATION DO NOT APPLY A.C. POWER TO THE RHBDA UNTIL CABLES ARE CONNECTED TO BOTH PORTS OF THE RHBDA AND THE ANTENNAS. 1. Side the RHBDA into the 19” accessible rack. Mount the RHBDA to the rack. Using appropriate screws, attach the RHBDA to the rack at the four mounting holes on the Front panel. 2. Ensure that the isolation between the donor antenna and the service antenna is at least 12 dB greater than the RHBDA gain.
RHBDA OPERATION Refer to figure 3 for adjustment access location and label. Variable Step Attenuator The RHBDA’s gain can be reduced on the Rack Unit by up to 30 dB on the Uplink and Downlink, in 2 dB steps using the variable step attenuators. Gain adjustment is made with rotary switches accessible via the Front panel on the RHBDA enclosure. Arrows on the shafts of these switches point to the value of attenuation selected.
Figure 4 Rack Front Panel Adjustment Downlink ALC & Alarm LED’s Uplink ALC & Alarm LED’s Power Switch Downlink Attenuator 4 2 0 28 30 0 4 14 16 18 20 2 12 10 12 14 16 18 30 6 22 24 26 2 Uplink Attenuator 28 2 20 26 Figure 4a Rack Back Panel Connections UL/DL In & Out Connectors Mobile Connector Page 10 AC Power Inlet Optional Alarm Connector 6 8 10
RF EXPOSURE WARNING The antenna used for this transmitter must be fixed-mounted on outdoor permanent structures. In order to satisfy the FCC RF exposure requirements, the BDA/antenna installation must comply with the following: The downlink indoor antenna (Omni type or similar directional antenna) must be installed so as to provide a minimum separation distance of 0.35 meters (35 cm) between the antenna and persons within the area. (This assumes a typical antenna with Unity gain (VSWR ≤ 1.
