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General
Information Glossary of Electrical Specifications Manual Step Attenuators |
 Model 839 |
Key Benefits
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Weight: 12 ounces, .34 kilograms
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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 20,30,30,30 |
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Insertion Loss (MHz) DC-250 250-1000 1000-1500 1000-2000 |
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| 0.3 | 0.3 | 0.3 | 0.1 (DC-1 MHz) |
|
| 0.6 | 0.6 | 0.6 | ---- | |
|
1.0 |
1.0 | ---- | ---- | |
|
---- |
1.0 | ---- | ---- | |
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VSWR (MHz) DC-250 250-1000 1000-1500 1000-2000 |
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| 1.1:1 | 1.1:1 | 1.1:1 | 1.1:1 (DC-1 MHz) |
|
| 1.3:1 | 1.3:1 | 1.3:1 | ---- | |
| 1.4:1 | 1.4:1 | ---- | ---- | |
| ---- | 1.4:1 | ---- | ---- | |
| Attenuation Accuracy Per Step (+ or - dB) |
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.1-.3 dB steps DC-250MHz |
---- | ---- | 0.05 | ---- |
|
250-1000MHz |
---- | ---- | 0.1 | ---- |
|
.5-10 dB steps |
0.1 | ---- | 0.1 | ---- |
|
250-1000MHz |
0.2 | ---- | 0.2 | ---- |
|
1000-1500MHz |
0.3 | ---- | ---- | ---- |
|
1-10 dB steps DC-250MHz |
---- | 0.1 | ---- |
0.05 |
|
250-1000MHz |
---- | 0.2 | ---- | ---- |
|
1000-1500MHz |
---- | 0.3 | ---- | ---- |
|
1000-2000MHz |
---- | 0.3 | ---- | ---- |
|
20 dB steps DC-250MHz |
0.1 | 0.1 | ---- |
0.1 |
|
250-1000MHz |
0.3 | 0.3 | ---- | ---- |
|
1000-1500MHz |
0.5 | 0.5 | ---- | ---- |
|
1000-2000MHz |
---- | 0.5 | ---- | ---- |
|
30 dB steps |
0.2 | ---- | ---- |
0.2 |
|
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 |
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|
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-250 250-500 250-1000 1000-1500 |
0.3 0.6 0.6 ---- |
0.3 0.6 0.6 1.0 |
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VSWR (MHz) DC-250 250-500 250-1000 1000-1500 |
1.1:1
1.3:1 1.3:1 ---- |
1.1:1
1.3:1 1.3:1 1.5:1 |
| Attenuation Accuracy Per
Step (+ or - dB) .1-.3 dB steps DC-250MHz 250-500MHz .5-10 dB
steps 250-500MHz 250-1000MHz 1-10 dB
steps 250-1000MHz 1000-1500MHz 20 dB
steps 250-1000MHz 1000-1500MHz 30 dB
steps 250-1000MHz |
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| ---- | ---- | |
| ---- | ---- | |
| 0.1 | ---- | |
| 0.3 | ---- | |
| 0.3 | ---- | |
| ---- | 0.1 | |
| ---- | 0.3 | |
| ---- | 0.5 | |
| 0.1 | 0.1 | |
| 0.4 | 0.4 | |
| ---- | 0.7 | |
| 0.2 | ---- | |
| 0.8 | ---- | |
| Maximum Input Power |
3 watts continuous operation, -55 to +85 degrees C, 800 watts 1% duty cycle, 100 volts peak-to-peak maximum |
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BNC connectors are standard on all models.
SMA and TNC connectors are available as options for 50 ohm models.
F connectors are available as an option for 75 ohm models.
| Quantity (with BNC connectors) |
Quantity (with SMA connectors) |
Quantity (with TNC connectors) |
Quantity (with F connectors) |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Model | 1 | 2-9 | 10-24 | 1 | 2-9 | 10-24 | 1 | 2-9 | 10-24 | 1 | 2-9 | 10-24 |
| 837 | $299 | $281 | $268 | $314 | $296 | $283 | $314 | $296 | $283 | NA | NA | NA |
| 839 | $299 | $281 | $268 | $314 | $296 | $283 | $314 | $296 | $283 | NA | NA | NA |
| 1/839 | $299 | $281 | $268 | $314 | $296 | $283 | $314 | $296 | $283 | NA | NA | NA |
| 847 | $299 | $281 | $268 | $314 | $296 | $283 | $314 | $296 | $283 | $314 | $296 | $283 |
| 849 | $299 | $281 | $268 | $314 | $296 | $283 | $314 | $296 | $283 | $314 | $296 | $283 |
| 865 | $299 | $281 | $268 | $314 | $296 | $283 | $314 | $296 | $283 | NA | NA | NA |
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