background image

 
MECHANICAL SPECIFICATIONS: 

 

Size 

 

      : 

13.5 

12.5 

5.6 

inch 

: (343 x 317.5 x 142.3 mm) 
 

RF 

Connectors 

 

    : 

N-type 

Female 

 
Weight 

      : 

20.9 

Lbs. 

(9.5kg.) 

approx. 

 

ENVIRONMENTAL CONDITIONS: 

 

The unit is designed for indoor applications: 
 
Operating temperature: - 20

°

C to + 50

°

 
Storage temperature: - 50

°

C to + 90

°

 

BDA CONNECTIONS 

 

The BDA AC power is accepted through a standard 3-wire male plug (IEC-320) with 
phase, neutral and ground leads. The AC power is wired to a high efficiency DC 
switching power supply which is CE and UL approved. The power supply runs the 
amplifiers and the Power On lamp. The metal enclosure of the BDA is connected to 
ground.  
 
A 9-pin D-Sub connector provides failure alarm output contacts (see diagram next 
page) as well as an optional 12 VDC (250mA) auxiliary output.    
 
The RF connections are made via two type “N” female connectors. The RF connector 
labeled “BASE” must be connected to the antenna pointing towards the base station. 
The RF connection labeled “MOBILE” must be connected to the antenna facing the 
area to be covered by the BDA. 
 
The RF connections must be made through cables with characteristic impedance of 
50 ohms. 
 

The isolation between the base station antenna and the mobile antenna should 
be at least 12 dB higher than the BDA gain. Isolation less than this value can 
cause gain ripple across the band. Isolation equal to or less than the BDA gain 
will give rise to oscillations which will saturate the amplifiers and possibly 
cause damage to the BDA.  

 
 

 
 
 
 

 

Page 5 

Summary of Contents for BDA-2W-80-A

Page 1: ...INSTALLATION AND OPERATING MANUAL BDA PS7 PS8 2 2W 80 A DUAL BAND BI DIRECTIONAL AMPLIFIER ...

Page 2: ...IONS 4 MECHANICAL SPECIFICATIONS 5 ENVIRONMENTAL CONDITIONS 5 BDA CONNECTIONS 5 MECHANICAL OUTLINE DRAWING Figure 1 1a 6 BDA INSTALLATION 7 BDA OPERATION 8 UPLINK MECHANICAL OUTLINE ADJUSTMENT Figure 2 9 DOWNLINK MECHANICAL OUTLINE ADJUSTMENT Figure 3 10 RF EXPOSURE WARNING 11 DIAGNOSTICS GUIDE 11 Page 2 ...

Page 3: ... from the base station and amplifies and transmits them to the subscriber The BDA Uplink path receives RF signals from the subscriber and amplifies and transmits them to the base station The Uplink and Downlink occupy three distinct frequency bands The frequency bands are as follows 794 824 MHz for the Uplink and 764 776 MHz 851 869 MHz for the Downlink Two triplexers isolate the paths and route e...

Page 4: ...k 26 dBm Isolation between Up Down Link 100 dB min Input Output Impedance 50 Ohms VSWR Input Output 1 5 1 max Pass band Gain min attenuation 80 dB minimum Power Supply 110VAC 1 42Amp 240VAC 0 71 Amp 50 to 60 Hz The Manufacturer s rated output power of this equipment is for single carrier operation For situations when multiple carrier signals are present the rating would have to be reduced by 3 5 d...

Page 5: ... connector provides failure alarm output contacts see diagram next page as well as an optional 12 VDC 250mA auxiliary output The RF connections are made via two type N female connectors The RF connector labeled BASE must be connected to the antenna pointing towards the base station The RF connection labeled MOBILE must be connected to the antenna facing the area to be covered by the BDA The RF con...

Page 6: ...line Figure 1a Relay Shown in Non Alarm Condition The alarm monitors current of both uplink and downlink amplifiers An alarm condition will occur if either uplink or downlink amplifiers are over or under its current tolerance Page 6 Conditions for Optional Alarm ...

Page 7: ...a to the BDA connector labeled BASE and the cable from the service antennas to the BDA connector labeled MOBILE 4 Open the adjustment access panels on the sides of the BDA and verify that both of the attenuator s are positioned to its maximum setting 30 dB Close the panels 5 Connect the AC power cord to the BDA and then to the power source Verify that the Power ON lamp is illuminated Installation ...

Page 8: ... to the factory preset level of 26 dBm ALC function is located on each amplifier and accessible via the access door on the BDA enclosure A red indicator lamp located on each amplifier illuminates when output power meets or exceeds the ALC set point The indicator is functional regardless of the position of the ALC momentary switch To establish proper operating gain on the Uplink and Downlink sides ...

Page 9: ...Figure 2 Uplink Adjustment Access Panel and Label Page 9 OFF ON ALC 0 30 UPLI NK ...

Page 10: ...Figure 3 Downlink Adjustment Access Panel and Label Page 10 0 30 DOW NLINK OFF ON ALC ...

Page 11: ...equires no periodic maintenance There are no user serviceable components inside the BDA This section covers possible problems that may be related to the installation or operating environment a Gain Reduction Possible causes Bad RF cables and RF connections to antennas damaged antennas b Excessive Intermodulation or Spurious Possible causes Amplifier oscillation caused by insufficient isolation The...

Reviews: