Trilithic

Benchtop Attenuators

Benchtop Attenuators

  • Wide Frequency Range
  • High Accuracy Rate
  • Price Competitive
  • Flexible Design Configurations

BMA benchtop attenuators offer a wide variety of step sizes, impedances, dynamic ranges, connectors. The units combine two or three of the RSA series units in a durable case suitable for bench or portable use.

Reliability Metrics

Mean Time Between Failure (MTBF) 1.09 x 106 hours
Mean Time to Repair (MTTR) 10 hours
Inherent Availability (Ai) 99.9%

50 ohm, SMA, N, or BNC Connectors

Model BMA-3511 BMA-35111 BMA-35110
Frequency Range
DC to 1.0 GHz
DC to 1.0 GHz
DC to 3 GHz
Impedance
50 Ohms
50 Ohms
50 Ohms
Attenuation
0 - 11 by .1 dB
0 - 111 dB in .1 dB Steps
0 - 100 by 1 dB
Average Power
2 Watts (25° C)
2 Watts (25° C)
1 Watt (25° C)
Switching Life
200,000 Steps Minimum
200,000 Steps Minimum
200,000 Steps Minimum
Rotation
Clockwise for increasing
attenuation in 30 degree indexing
Clockwise for increasing
attenuation in 30 degree indexing
Clockwise for increasing
attenuation in 30 degree indexing
Connectors
Female: SMA, BNC, N
Female: SMA, BNC, N
Female: SMA, BNC, N
(BNC not recommended above 1 GHz)
Temperature
0 to 50° C
0 to 50° C
0 to 50° C
Insertion Loss
DC - 1.0 GHz 1.25 dB max
DC - 1.0 GHz 1.70 dB max
DC - 1.0 GHz 1 dB max
1.0 - 3.0 GHz 2 dB max
Accuracy
DC - 1.0 GHz
±0.05 dB 0 - 1 dB (.1 dB steps)
±0.25 dB 1 - 10 dB (1 dB steps)
DC - 1.0 GHz
0 -1 dB ±0.05 dB
1 -10 dB ±0.25 dB
10-111 dB ±0.35 dB or 1.5 %
(Whichever is Greater)
DC - 1.0 GHz
±0.25 dB 1 - 10 dB (1 step)
±0.25 dB or 1.5%* 10 - 100 dB (10 step)
 
1.0 - 2.0 GHz
±0.35 dB 1 - 10 dB (1 step)
±0.35 dB or 2%* 10 - 100 dB (10 step)
 
2.0 - 2.5 GHz
±0.5 dB 1 - 10 dB (1 step)
±0.5 dB or 2%* 10 - 80 dB (10 step)
3% 90 - 100 dB (10 step)
 
2.5 - 3.0 GHz
±0.5 dB 1 - 10 dB (1 step)
±0.5 dB or 3%* 10 - 90 dB (10 step)
6% 90 - 100 dB (10 step)
 
* Whichever is greater
VSWR Return Loss
Frequency Range VSWR
DC - 1 GHz 1.3 : 1 max
Frequency Range VSWR
DC - 1.0 GHz 1.3 : 1 max
Frequency Range VSWR
DC - 1.0 GHz 1.3 : 1 max
1.0 - 2.0 GHz 1.4 : 1 max
2.0 - 3.0 GHz 1.5 : 1 max

75 ohm, BNC or F Connectors

Model BMA-711 BMA-780 BMA-781
Frequency Range
DC to 1 GHz
DC to 1 GHz
DC-1 GHz
dB Value
0 to 11 by 0.1 dB
0 to 80 by 1 dB
0 to 81 by 0.1 dB
Connectors
Female: BNC, F
Female: BNC, F
Female: BNC, F
Impedance
75 Ohms
75 Ohms
75 Ohms
VSWR
1.25:1 to 0.5 GHz
1.35:1 to 1 GHz
1.25:1 to 0.5 GHz
1.35:1 to 1 GHz
1.25:1 to 0.5 GHz
1.4:1 to 1 GHz
Accuracy
±0.04 dB to 0.5 GHz (0 to 1 dB)
±0.2 dB to 0.5 GHz (1 to 11 dB)
±0.06 dB to 1 GHz (0 to 1 dB)
±0.3 dB to 1 GHz
±0.2 dB to 0.5 GHz (0 to 10 dB)
±0.75 dB to 0.5 GHz (10 to 80 dB)
±0.3 dB to 1 GHz (0 to 10 dB)
±1.0 dB to 1 GHz
±0.04 dB to 0.5 GHz (0 to 1 dB)
±0.2 dB to 0.5 GHz (1 to 10 dB)
±0.75 dB to 0.5 GHz (10 to 81 dB)
±0.06 dB to 1 GHz (0 to 1 dB)
±0.3 dB to 1 GHz (1 to 10 dB)
±1.0 dB to 1 GHz (10 to 81 dB)
Insertion Loss
1.1 dB max. to 0.5GHz
1.5 dB max. to 1 GHz
01 dB max. to 1 GHz
.65 dB max. to 0.5 GHz
1.5 dB max. to 0.5 GHz
2 dB max. to 1 GHz
Temperature
-20° to +125° C
-20° to +125° C
-20° to +125° C
Average Power
0.5 Watt (25° C)
0.5 Watt (25° C)
1 Watt (25°C)
Peak Power
750 Watts, 3µSec. pulse
50 Watts, 3µSec. pulse
750 Watts, 3µSec. pulse
Rotation
Clockwise for
increasing attenuation
in 30° indexing
Clockwise for
increasing attenuation
in 30° indexing
Clockwise for
increasing attenuation
in 30° indexing
Weight
2 lb. 6 oz.
2 lb. 6 oz.
3 lb. 6 oz.
Housing
Baked enamel on aluminum
Baked enamel on aluminum
Baked enamel on aluminum
Width (inches)
6.625"
6.625"
10.125"
Height (inches)
2.625"
2.625"
2.625"
Depth (inches)
4.125"
4.125"
4.125"
Think Ahead.
Copyright © 2010 Trilithic, Inc. All Rights Reserved
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    50 ohm Bench Mount Manual Variable Attenuator BMA-3511
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    2 Watt DC-3GHz 50 ohm bench mount manual variable attenuator with SMA connector(s), 0-110 dB in 1 dB steps.
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    50 ohm Bench Mount Manual Variable Attenuator BMA-35111
    2 Watt DC-1GHz 50 ohm bench mount manual variable attenuator with SMA connector(s), 0-111 dB in 0.1 dB steps.
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    2 Watt DC-1GHz 50 ohm bench mount manual variable attenuator with BNC connector(s), 0-11 dB in 0.1 dB steps.
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    50 ohm Bench Mount Manual Variable Attenuator BMA-35110
    2 Watt DC-3GHz 50 ohm bench mount manual variable attenuator with BNC connector(s), 0-110 dB in 1 dB steps.
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    50 ohm Bench Mount Manual Variable Attenuator BMA-35111
    2 Watt DC-1GHz 50 ohm bench mount manual variable attenuator with BNC connector(s), 0-111 dB in 0.1 dB steps.
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    50 ohm Bench Mount Manual Variable Attenuator BMA-3511
    2 Watt DC-1GHz 50 ohm bench mount manual variable attenuator with N connector(s), 0-11 dB in 0.1 dB steps.
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    50 ohm Bench Mount Manual Variable Attenuator BMA-35110
    2 Watt DC-3GHz 50 ohm bench mount manual variable attenuator with N connector(s), 0-110 dB in 1 dB steps.
  • Request a Quote
    50 ohm Bench Mount Manual Variable Attenuator BMA-35111
    2 Watt DC-1GHz 50 ohm bench mount manual variable attenuator with N connector(s), 0-111 dB in 0.1 dB steps.
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    75 ohm Bench Mount Manual Variable Attenuator BMA-711
    2 Watt DC-1GHz 75 ohm bench mount manual variable attenuator with BNC connector(s), 0-11 dB in 0.1 dB steps.
  • Request a Quote
    75 ohm Bench Mount Manual Variable Attenuator BMA-780
    2 Watt DC-1GHz 75 ohm bench mount manual variable attenuator with BNC connector(s), 0-80 dB in 1 dB steps.
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    75 ohm Bench Mount Manual Variable Attenuator BMA-781

    2 Watt DC-1GHz 75 ohm bench manual variable attenuator with BNC connector(s), 0-81 dB in 0.1 dB steps.

  • Request a Quote
    75 ohm Bench Mount Manual Variable Attenuator BMA-711
    2 Watt DC-1GHz 75 ohm bench mount manual variable attenuator with F connector(s), 0-11 dB in 0.1 dB steps.
  • Request a Quote
    75 ohm Bench Mount Manual Variable Attenuator BMA-780
    2 Watt DC-1GHz 75 ohm bench mount manual variable attenuator with F connector(s), 0-80 dB in 1 dB steps.
  • Request a Quote
    75 ohm Bench Mount Manual Variable Attenuator BMA-781

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