BRSA Return Amplifier Trim Adjustments
DSC00874.JPG (1429591 bytes) The BRSA return amplifier is used in the Scientific-Atlanta trunk amplifier housing for systems of 550 MHz and below.  The block diagram of the BRSA circuitry is printed on the module lid for easy reference.  The BRSA frequency response network is visible in the photo below showing the internal components.  The animated GIF files below depict the effects of the response network controls.


Broadband International, Inc.

brsamot1.jpg (58409 bytes)

Mouse over an area of the picture to display the corresponding plot and description.

The range of all the network analyzer traces below is 0.3 MHz to 50 MHz.

PRODUCT MODEL BRSA      
Specifications      
PARAMETERS UNITS   NOTES
Technology   Hybrid  
Passband Mhz 5-42  
Gain dB 16 1
Frequency Response dB +/-.15 1
Station Tilt dB 0 1
Return Loss dB 18 1
DISTORTIONS AT RATED OUTPUT      
Rated at Output Levels dB 32  
Number of Channels   6  
Composite Triple Beat dB 102  
Crossmodulation dB 96  
Second Order Distortion dB 84  
Noise Figure dB 11 1
Current Consumption @24 V dc Amps 0.135  
Test Points +/- .5 dB dB -20 1
OEM P.N. BBI P.N. Values
372741 243025 30MHz 
 244025 40MHz