Installation and Operating Manual BDA-PS8NEPS-20/20-70-M BDA-PS8-20/20-70-M BDA-PS7W-20/20-70-M BDA-PS9-20/20-70-M Single Band Mini Bi-Directional Amplifier
Table of Contents SAFETY OPERATION INSTRUCTIONS .......................................................................................................... 3 OVERVIEW ............................................................................................................................................................... 4 FCC NOTE .................................................................................................................................. 4 IC NOTE ................................
SAFETY OPERATION INSTRUCTIONS BEFORE USE Review this manual and insure that all conditions are compatible with the amplifier's specifications. Safe operation may be impaired if this equipment is not used as intended. GENERAL DESCRIPTION This symbol is marked in the manual and denotes important safety operation instructions. Please read carefully before continuing.
OVERVIEW The BDA assembly extends the coverage area of radio communications in buildings and RF shielded environments. The BDA has dual RF paths to extend coverage in two distinct frequency bands. 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. FCC NOTE This is a Class B device.
GENERAL OPERATIONAL DESCRIPTION The BDA Downlink path receives RF signals 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 two distinct frequency bands. See table on page 6 for list of bands and corresponding band codes. Frequencies applicable to your unit will also be on unit’s specification sheet.
Table 1 CODE BDA‐PS7W‐20/20‐70‐M (US ) BDA‐PS7W‐20/20‐70‐M BDA‐PS7‐20/20‐70‐M (Canada) BDA‐PS8NEPS‐20/20‐70‐M (US) BDA‐PS8‐20/20‐70‐M BDA‐NPSPAC‐20/20‐70‐M BDA‐SMR‐0.15/0.15W‐35‐E BDA‐SMR‐0.5/0.
MECHANICAL SPECIFICATIONS: Size : 10 x 6.2 x 3.0 inch RF Connectors : N‐type Female Weight : 4.6 Lbs. approx.
AVAILABLE, OPTIONAL FEATURES The following options are available, (please review the specification provided with the unit, to verify the features included in your BDA ) Visual Alarms All G‐Wave systems include local visual alarms as a standard. Local visual alarms are LED lights located in the unit that indicate various failures. For a list of corresponding alarms, please see Variable Gain Adjustment and LED Indicators.
BDA CONNECTIONS The BDA uses an external power supply which connects through a single pin 15V DC input located on the back of the unit. A optional 9‐pin D‐Sub connector provides failure alarm output contacts. 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.
BDA INSTALLATION DO NOT APPLY A.C. POWER TO THE BDA UNTIL CABLES ARE CONNECTED TO BOTH PORTS OF THE BDA AND THE ANTENNAS. 1. Mount the BDA on the wall with the RF connectors pointing DOWN. Using appropriate screws and anchors, attach the BDA to the wall at the four mounting holes on the side flanges. 2. Ensure that the isolation between the donor antenna and the service antenna is at least 15 dB greater than the BDA gain.
MECHANICAL OUTLINE 11 | P a ge
BDA OPERATION ALC (Automatic Level Control) To minimize intermodulation products, each amplifier in the BDA contains an ALC feedback loop. The ALC circuit senses the output power and limits it to the factory preset level as specified on each product specification. Each amplifier in the BDA contains an ALC feedback loop. The ALC circuit senses the output power and limits it to the factory preset level.
Conditions for DC Backup Alarm The alarm monitors the AC power. If the AC power fails and DC is connected, the DC Alarm LED will indicate DC power is drawn. (Relay Shown in Non‐Alarm Condition) VARIABLE STEP ATTENUATOR BDA gain can be reduced by up to 30 dB in 2 dB steps using the variable step attenuator. Gain adjustment is made with rotary switches accessible via the access door of the BDA enclosure. Arrows on the shafts of these switches point to the value of attenuation selected.
LEDs and Fault Alarms G-WAVE amplifiers are shipped from the factory with 30 dB of attenuation dialed in. Units are not shipped with full gain to ensure input signal does not overdrive the ALC limitation of the unit. If the attenuation rotary switch is dialed to 30 – This indicates the unit has 30 dB of attenuation and is running on minimum gain potential of the system. *Oscillation Detect (ODSC) and MOBILE are optional features that may be populated into the O26 pin‐out.
LED INDICATOR DESCRIPTIONS AND FIELD TESTING Alarm LED AC Power DL Alarm UL Alarm Description Illuminates when the AC voltage is supplied, the unit is ON, and the AC/DC power supply is operating. Illuminates when the DL amplifier fails. Illuminates when the UL amplifier fails. DL ALC Illuminates when DL composite power reaches the ALC set. UL ALC Illuminates when UL composite power reaches the ALC set.
DIAGNOSTICS GUIDE The BDA provides long term, care‐free operation and requires 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. Gain Reduction Possible causes: Bad RF cables and RF connections to antennas, damaged antennas. Occasional Drop‐out of some Channels Possible causes: One channel with very strong power dominates the RF output of the amplifier.
APPENDIX 1 Conditions for Donor Alarm (26‐pin) This functionality applies only for a Donor antenna with a DC short. Alarm monitors the connection of the BDA to the donor antenna. An alarm condition will occur if there is a disconnect at the donor antenna. Uplink and Downlink amplifiers will shut down. Donor Alarm, Current DL, and Current UL will indicate.
APPENDIX 2 Antenna Separation variable definitions: 18 | P a ge
