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Narrow
Band High Range Variable Attenuators (All Custom Made / Consult Factory) 
High Dynamic Range Linearized Voltage or
Digital Controlled Excellent Linearity and Flatness Temperature Compensated
Available
with variety of options Other Frequencies available (Consult
Factory)- Specifications are subject to change without notice - Click on "  "
to see the actual response curves (subject to availability) |
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RF Circuit |
Voltage Control Driver |
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Digital Control Driver |
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Common Specifications | |
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Available Options | |
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> Specifications are subject to change
without notice |
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| Voltage Controlled Attenuator (VCA) / (AT-X8XX-HV Series) |
| Digital Controlled Attenuator (DCA) / (AT-X8XX-HD Series) |
Specifications for Standard Models (80 dB Dynamic Range Maximum)
Model
No. |
Frequency (Ghz) |
Insertion
Loss (dB) Max |
VSWR Max |
Power
Rating Operating (CW/PK) Survival (CW/AVG) |
Settling Time (1) |
Attenuation Flatness (-/+ dB) |
Outline Drawing |
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| 10dB | 20dB | 40dB | 60dB | 80 dB | |||||||
| AT-H800-HV | 3 - 6 | 2.2 | 1.6:1 | +20dbm
(O) +30dbm (S) |
1µs (5µs<PW<0.1S) |
0.3 | 0.8 | 1.3 | 1.5 | 2.0 | -HV |
| AT-H800-HD | -HD | ||||||||||
| AT-N800-HV |
8
- 18 |
3.6 | 1.9:1 | +20dbm
(O) +30dbm (S) |
1µs (5µs<PW<0.1S) |
0.9 | 1.6 | 2.3 | 2.4 | 2.3 | -HV |
| AT-N800-HD | -HD | ||||||||||
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1) "settling time" is defined as the time attenuation level transits from one attenuation level to within -/+1dB of another attenuation level |
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| All Standard Models: | |||
 Impedance: |
50 Ω | ||
| Mean
Attenuation Range: |
80 dB Nominal | ||
| Control
Characteristics: |
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| - Voltage Controlled Units (AT-X8XX-HV series) | 0V
to +8V,
Slope = 10dB/Volt, Impedance=5~10Kohms (0V = 0dB Attenuation (Reference)) |
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- Digital Controlled Units
(AT-X8XX-HD series) |
9
Bit Positive Binary TTL ( LSB=0.25dB, MSB=64dB), Impedance=5~10Kohms |
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| Transfer
Function Accuracy (Mean Attenuation): |
0 - 0.8 dB | ±50% Max | |
| >0.8 - 10 dB | ± 0.40 dB Max | ||
| >10 - 30 dB | ± 0.50 dB Max | ||
| >30 - 50 dB | ± 0.90 dB Max | ||
| >50 - 70 dB | ± 1.35 dB Max | ||
| >70 - 80 dB | ± 1.85 dB Max | ||
| Power
Supplies: |
+12 to +15 VDC @ 70mA Max | ||
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(Supplies are internally regulated) |
-12 to -15 VDC @ 70mA Max | ||
| Connectors: |
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| - RF Input / Output | SMA (female), Removable | ||
| - Supply and Control (AT-X8XX-HV) | Solder Pins | ||
| - Supply and Control (AT-X8XX-HD) | 15-Pin D-Type Subminiature Male | ||
| Temperature
Coefficient: |
±0.025 dB/°C (Over Operating Temperature Range) | ||
| Environmental Ratings: | ||
| Temperature: |
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| - Operating | -40° C to +85°C | |
| - Storage | -50° C to +100°C | |
| Humidity: |
Mil-STD-202F, Method 103B Condition B | |
| Shock: |
Mil-STD-202F, Method 213B Condition B | |
| Vibration: |
Mil-STD-202F, Method 204D Condition B | |
| Altitude: |
Mil-STD-202F, Method 105C Condition B | |
| Temp.
Cycle: |
Mil-STD-202F, Method 107D Condition B | |
| Available Options: | ||||
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1) Units with options
listed here may be subject to some specification
tradeoffs from the standard, consult factory 2) Some options may not be available on all models, consult factory |
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| RF
Connectors |
Control
Function Resolution (AT-X8XX-HD series <>
"80dB Range") |
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| B1 [ J1 SMA (male) ] | E1 [ LSB = 1/8 dB <> 10-Bits <> "fractional steps" ] | |||
| B2 [ All SMA (male) ] | R1 [ LSB = 0.1 dB <> 10-Bits <> "decimal steps" ] | |||
| E2 [ LSB = 1/16 dB <> 11-Bits <> "fractional steps" ] | ||||
| Control
Connector (-HV series) |
R2 [ LSB = 0.05 dB <> 11-Bits <> "decimal steps" ] | |||
| C1 [ SMC (Jack), 50 Ω ] |
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E3 [ LSB = 1/32 dB <> 12-Bits <> "fractional steps" ] | ||
| C2 [ SMB (Jack), 50 Ω ] |
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Transfer
Functions |
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| F1 [ Slope = 5dB/Volt ] / (AT-X8XX-HV series) | ||||
| C3 [ SMA(Female) ] | F3 [ Reverse Control Voltage (0V = Max Attenuation)] / (AT-X8XX-HV series) | |||
| F3 [ Inverse Logic ("00.....00" = Max Attenuation)] / (AT-X8XX-HD series) | ||||
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Control Impedance (AT-X8XX-HV series) |
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| D1 [ 50 Ω, Internally Terminated ] |
Attenuation Range (AT-X8XX-HD series <>
Limited Range) |
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| G1 [ 63.875 dB Attenuation Range / 9-Bits (LSB=1/8 dB) <> fractional steps] | ||||
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