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Manual Step Attenuators
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Electrical Specifications
| Model |
837 |
839 |
1/839 |
865 |
| Impedance (ohms) |
50 |
50 |
50 |
600 |
| Frequency Range (MHz) |
DC-1500 |
DC-2000 |
DC-1000 |
DC-1 |
| Attenuation Range (dB) |
0-102.5 |
0-101 |
0-22.1 |
0-132 |
| Minimum Steps (dB) |
0.5 |
1 |
.1 |
1 |
| Attenuation Pad Values (dB) |
0.5,1,2,3,6, 10,20,30,30 |
1,2,3,5,10, 20,20,20,20 |
.1,.2,.3,.5, 1,2,3,5,10 |
1,2,3,6,10, 20,30,30 |
| Insertion Loss (MHz) |
DC-250 |
0.3 |
0.3 |
0.3 |
0.1(DC-1MHz) |
| 250-1000 |
0.6 |
0.6 |
0.6 |
------ |
| 1000-1500 |
1.0 |
1.0 |
------ |
------ |
| 1000-2000 |
------ |
1.0 |
------ |
------ |
| VSWR (MHz) |
DC-250 |
1.1:1 |
1.1:1 |
1.1:1 |
1.1:1(DC-1MHz) |
| 250-1000 |
1.3:1 |
1.3:1 |
1.3:1 |
------ |
| 1000-1500 |
1.4:1 |
1.4:1 |
------ |
------ |
| 1000-2000 |
------ |
1.4:1 |
------ |
------ |
| Attenuation Accuracy Per Step (+
or – dB) |
|
|
|
|
| .1-.3 dB steps |
DC-250 MHz |
------ |
------ |
0.05 |
------ |
------ |
| 250-1000MHz |
------ |
------ |
0.1 |
------ |
| .5-10dB steps |
DC-250MHz |
0.1 |
------ |
0.1 |
------ |
| 250-1000MHz |
0.2 |
------ |
0.2 |
------ |
| 1000-1500MHz |
0.3 |
------ |
------ |
------ |
| 1-10dB steps |
DC-250MHz |
------ |
0.1 |
------ |
0.05(DC-1MHz) |
| 250-1000MHz |
------ |
0.2 |
------ |
------ |
| 1000-1500MHz |
------ |
0.3 |
------ |
------ |
| 1000-2000MHz |
------ |
0.3 |
------ |
------ |
| 20dB steps |
DC-250MHz |
0.1 |
0.1 |
------ |
0.1(DC-1MHz) |
| 250-1000MHz |
0.3 |
0.3 |
------ |
------ |
| 1000-1500MHz |
0.5 |
0.5 |
------ |
------ |
| 1000-2000MHz |
------ |
0.5 |
------ |
------ |
| 30dB steps |
DC-250MHz |
0.2 |
------ |
------ |
0.2(DC-1MHz) |
| 250-1000MHz |
0.5 |
------ |
------ |
------ |
| 1000-1500MHz |
1.0 |
------ |
------ |
------ |
| Maximum Input Power |
3
watts continuous operation,-55 to +85 degrees C,
800
watts 1% duty cycle, 100 volts peak-to-peak maximum |
| Model |
847 |
849 |
| Impedance (ohms) |
75 |
75 |
| Frequency Range (MHz) |
DC-1000 |
DC-1500 |
| Attenuation Range (dB) |
0-102.5 |
0-101 |
| Minimum Steps (dB) |
0.5 |
1 |
| Attenuation Pad Values (dB) |
0.
5,1,2,3,6 10,20,30,30 |
1,2,3,5,10 20,20,20,20 |
| Insertion Loss (MHz) |
DC-250 |
0.3 |
0.3 |
| 250-500 |
0.6 |
0.6 |
| 250-1000 |
0.6 |
0.6 |
| 1000-1500 |
------ |
1.0 |
| VSWR (MHz) |
DC-250 |
1.1:1 |
1.1:1 |
| 250-500 |
1.3:1 |
1.3:1 |
| 250-1000 |
1.3:1 |
1.3:1 |
| 1000-1500 |
------ |
1.5:1 |
| Attenuation Accuracy Per step (+
or – dB) |
| .1-.3 dB steps |
DC-250MHz |
------ |
------ |
| 250-500MHz |
------ |
------ |
| .5-10dB steps |
|
0.1 |
------ |
| 250-500MHz |
0.3 |
------ |
| 250-1000MHz |
0.3 |
------ |
| 10dB steps |
DC-250MHz |
------ |
0.1 |
| 250-1000MHz |
------ |
0.3 |
| 1000-1500MHz |
------ |
0.5 |
| 20dB steps |
DC-250MHz |
0.1 |
0.1 |
| 250-1000MHz |
0.4 |
0.4 |
| 1000-1500MHz |
------ |
0.7 |
| 30dB steps |
DC-250MHz |
0.2 |
------ |
| 250-1000MHz |
0.8 |
------ |
| Maximum Input Power |
3
watts continuous operation,-55 to +85 degree C,
800
watts 1% duty cycle, 100 volts peak-to-peak maximum |
Model 837
| Attenuation Range |
0-102.5 dB |
| Impedance |
50Ω |
| Frequency Range |
DC to 1500 MHz |
| Attenuation Steps, dB |
0.5,1,2,3,6,10,20,30,30 |
| Max. Input Power |
3 watts continuous operation, -55
to +85 degrees C >800 watts 1% duty cycle, 100VP/P
max. |
| Connectors |
BNC Standard (Options: SMA, TNC) |
| Weight |
12 ozs., .34 kgs. |
| |
DC-250 MHz |
250-1000 MHz |
1000-1500 MHz |
| Insertion Loss, dB |
0.3 |
0.6 |
1.0 |
| VSWR |
1.1:1 |
1.3:1 |
1.4:1 |
| 0.5-10 dB Steps, +/- dB |
0.1 |
0.2 |
0.3 |
| 20 dB Steps, +/- dB |
0.1 |
0.3 |
0.5 |
| 30 dB Steps, +/- dB |
0.2 |
0.5 |
1.0 |
Model 839
| Attenuation Range |
0-101 dB |
| Impedance |
50Ω |
| Frequency Range |
DC to 2000 MHz |
| Attenuation Steps, dB |
1,2,3,5,10,20,20,20,20 |
| Max. Input Power |
3 watts continuous operation, -55
to +85 degrees C >800 watts 1% duty cycle, 100VP/P max. |
| Connectors |
BNC Standard (Options: SMA, TNC) |
| Weight |
12 ozs., .34 kgs. |
| |
DC-250 MHz |
250-1000 MHz |
1000-2000 MHz |
| Insertion Loss, dB |
0.3 |
0.6 |
1.0 |
| VSWR |
1.1:1 |
1.3:1 |
1.4:1 |
| 1-10 dB Steps, +/- dB |
0.1 |
0.2 |
0.3 |
| 20 dB Steps, +/- dB |
0.1 |
0.3 |
0.5 |
Model 1/839
| Attenuation Range |
0-22.1 dB |
| Impedance |
50Ω |
| Frequency Range |
DC to 1000 MHz |
| Attenuation Steps, dB |
.1,.2,.3,.5,1,2,3,5,10 |
| Max. Input Power |
3 watts continuous operation, -55
to +85 degrees C >800 watts 1% duty cycle, 100VP/P max. |
| Connectors |
BNC Standard (Options: SMA, TNC) |
| Weight |
12 ozs., .34 kgs. |
| |
DC-250 MHz |
250-1000 MHz |
| Insertion Loss, dB |
0.3 |
0.6 |
| VSWR |
1.1:1 |
1.3:1 |
| .1-3 dB Steps, +/- dB |
0.05 |
0.1 |
| .5-10 dB Steps, +/- dB |
0.1 |
0.2 |
Model 865
| Attenuation Range |
0-132 dB |
| Impedance |
600Ω |
| Frequency Range |
DC to 1 MHz, usable to 10 MHz |
| Attenuation Steps, dB |
1,2,3,6,10,20,30,30,30 |
| Max. Input Power |
3 watts continuous operation, -55
to +85 degrees C >800 watts 1% duty cycle, 100VP/P max. |
| Connectors |
BNC Standard (Options: SMA, TNC) |
| Weight |
12 ozs., .34 kgs. |
| |
DC-1 MHz |
| Insertion Loss, dB |
0.1 |
| VSWR |
1.1:1 |
| 1-10 dB Steps, +/- dB |
0.05 |
| 20 dB Steps, +/- dB |
0.1 |
| 30 dB Steps, +/- dB |
0.2 |
Model 847
| Attenuation Range |
0-102.5 dB |
| Impedance |
75Ω |
| Frequency Range |
DC to 1000 MHz |
| Attenuation Steps, dB |
0.5,1,2,3,6,10,20,30,30 |
| Max. Input Power |
3 watts continuous operation, -55
to +85 degrees C >800 watts 1% duty cycle, 100VP/P
max. |
| Connectors |
BNC Standard (Options: “F”) |
| Weight |
12 ozs., .34 kgs. |
| |
DC-250 MHz |
250-1000 MHz |
| Insertion Loss, dB |
0.3 |
0.6 |
| VSWR |
1.1:1 |
1.3:1 |
| 0.5-10 dB Steps, +/- dB |
0.1 |
0.3 |
| 20 dB Steps, +/- dB |
0.1 |
0.4 |
| 30 dB Steps, +/- dB |
0.2 |
0.8 |
Model 849
| Attenuation Range |
0-101 dB |
| Impedance |
75Ω |
| Frequency Range |
DC to 1500 MHz |
| Attenuation Steps, dB |
1,2,3,5,10,20,20,20,20 |
| Max. Input Power |
3 watts continuous operation, -55
to +85 degrees C >800 watts 1% duty cycle, 100VP/P
max. |
| Connectors |
BNC Standard (Options: “F”) |
| Weight |
12 ozs., .34 kgs. |
| |
DC-250 MHz |
250-1000 MHz |
1000-2000 MHz |
| Insertion Loss, dB |
0.3 |
0.6 |
1.0 |
| VSWR |
1.1:1 |
1.3:1 |
1.5:1 |
| 1-10 dB Steps, +/- dB |
0.1 |
0.3 |
0.5 |
| 20 dB Steps, +/- dB |
0.1 |
0.4 |
0.7 |
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