Description
The CMA-b is a low noise, single channel VHF preamplifier with excellent gain and the ability to accept a wide
range of input signal levels, making it ideal for CATV and MATV headend installations. The CMA-b mounts on
the antenna mast and power is duplexed on the downlead, eliminating a separate power supply lead.
Features
• Very Low Noise Figure
• Excellent Gain, Flat Response
• Excellent Adjacent Channel Overload Rejection
• Output Monitor Jack Permits Testing Without Service Interruption
©2007 Blonder Tongue Laboratories, Inc. All rights reserved. Specifications are subject to change without notice. Trademarks are the property of their respective owner.
651094300M
INSTRUCTION MANUAL
One Jake Brown Road
Old Bridge, NJ 08857-1000 USA
(800) 523-6049 • (732) 679-4000 • FAX: (732) 679-4353
www.blondertongue.com
CMA-b
Low Noise, Single Channel Preamplifier
Stock No. 4706
Gain
CMA-b ch. 2 - 6:
29 dB, 26 dB min
CMA-b ch. 7 - 13:
26 dB, 25 dB min
CMA-b FM:
24 dB, 20 dB min
Bandpass Flatness
Channels 2 - 13:
6 MHz +/- 0.25 dB
FM:
1 dB, 2 dB max.
Noise Figure
CMA-b ch. 2 - 6:
Less than 3.5 dB
CMA-b ch. 7 - 13:
Less than 2.5 dB
CMA-b FM:
2 dB, 3 dB max.
Input Impedance:
75 ohms
Selectivity:
12 dB down 9 MHz
from center freq.,
10 dB min.
Minimum Recommended
Input for TASO Grade 1 (Excellent
Picture)
CMA-b 2 - 6 & 7 - 13: 300 µv (-10 dBmv)
Maximum Input for Just-Perceptible Cross
Modulation
CMA-b ch. 2 - 6:
36 dBmv
CMA-b ch. 7 - 13:
28 dBmv
Maximum Input for Just-Perceptible
Intermodulation
CMA-b ch. 2 - 6:
33 dBmv
CMA-b ch. 7 - 13:
26 dBmv
Operating Ambient
Temperature Range: -40˚ F to 140˚ F
Output Monitor Jack: -20 dB (Backmatched)
Power Requirement: -21 VDC at 40 ma
Connectors (75 ohms)
Input: Type F, Output, Type F, Output Monitor: Type F
Housing:
Cast Aluminum
Dimensions:
5" x 3-7/8" x 2-5/16"
Shipping Weight:
1 lb., 5 oz.
Specifications (Typical)
