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Narrow
Band Variable Attenuators (All Custom Made / Consult Factory) 
High Power Handling 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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| "AT....V" Series are Voltage-Controlled-Attn. (VCA) |
| "AT....D" Series are Digital-Controlled-Attn. (DCA) |
| "AT....C" Series are Current-Controlled-Attn. (CCA) |
Specifications for Standard High Power Models (60 dB Range)
| 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 | 30dB | 40dB | 60dB | |||||||
| AT-A050-60V | 0.25 - 0.5 | 1.7 | 1.4:1 | +27dbm
(O) +33dbm (S) |
5µs (20µs<PW<0.1S) |
0.3 | 0.8 | 1.2 | 1.5 | 1.6 | -HV |
| AT-A050-60D | -HD | ||||||||||
| AT-A050-60C | -HC | ||||||||||
| AT-AB50-60V | 0.275
- 0.750 |
1.7 | 1.4:1 | +27dbm
(O) +33dbm (S) |
5µs (20µs<PW<0.1S) |
0.7 | 1.5 | 2.1 | 2.6 | 2.9 | -HV |
| AT-AB50-60D | -HD | ||||||||||
| AT-AB50-60C | -HC | ||||||||||
| AT-B050-60V | 0.5 - 1 | 1.7 | 1.4:1 | +28dbm
(O) +33dbm (S) |
4µs (10µs<PW<0.1S) |
0.3 | 0.8 | 1.2 | 1.5 | 1.6 | -HV |
| AT-B050-60D | -HD | ||||||||||
| AT-B050-60C | -HC | ||||||||||
| AT-C050-60V | 1 - 2 | 1.7 | 1.4:1 | +29dbm
(O) +33dbm (S) |
3µs (10µs<PW<0.1S) |
0.3 | 0.8 | 1.2 | 1.5 | 1.6 | -HV |
| AT-C050-60D | -HD | ||||||||||
| AT-C050-60C | -HC | ||||||||||
| AT-CD50-60V | 1.5 - 3 | 1.7 | 1.4:1 | +30dbm
(O) +33dbm (S) |
3µs (10µs<PW<0.1S) |
0.3 | 0.8 | 1.4 | 1.7 | 1.95 | -HV |
| AT-CD50-60D | -HD | ||||||||||
| AT-CD50-60C | -HC | ||||||||||
| AT-D050-60V | 2 - 4 | 1.7 | 1.4:1 | +30dbm
(O) +33dbm (S) |
3µs (10µs<PW<0.1S) |
0.3 | 0.8 | 1.2 | 1.5 | 1.75 | -HV |
| AT-D050-60D | -HD | ||||||||||
| AT-D050-60C | -HC | ||||||||||
| AT-H050-60V | 3 - 6 | 1.8 | 1.6:1 | +30dbm
(O) +33dbm (S) |
3µs (10µs<PW<0.1S) |
0.3 | 0.8 | 1.0 | 1.3 | 1.8 | -HV |
| AT-H050-60D | -HD | ||||||||||
| AT-H050-60C | -HC | ||||||||||
| AT-E050-60V | 4 - 8 | 2.0 | 1.7:1 | +30dbm
(O) +33dbm (S) |
3µs (10µs<PW<0.1S) |
0.3 | 0.8 | 1.3 | 1.7 | 1.9 | -HV |
| AT-E050-60D | -HD | ||||||||||
| AT-E050-60C | -HC | ||||||||||
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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: |
60 dB Nominal | ||
| Control
Characteristics: |
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| - Voltage Controlled Units (-HV) | 0V
to +6V,
Slope = 10dB/Volt, Impedance=5~10Kohms (0V = 0dB Attenuation (Reference)) |
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Digital Controlled Units (-HD) |
8
Bit Positive Binary TTL ( LSB=0.25dB, MSB=32dB), Impedance=5~10Kohms |
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| - Current Controlled Units (-HC) | 0 - 15 mA Forward Current (approx.) | ||
| 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 - 60 dB | ± 1.20 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 (-HV) | Solder Pins | ||
| - Supply and Control (-HD) | 15-Pin D-Type Subminiature Male | ||
| Temperature
Coefficient: |
±0.05 dB/°C (Over -20°C to +70°C) | ||
| 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) units with options listed here may be subject to lower or higher cost than the standard units. 3) Some options may not be available on all models, consult factory |
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| RF
Connectors |
Transfer
Functions (-HV series) |
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| B1 [ J1 SMA(M) ] | F1 [ Slope = 5dB/Volt ] / (-HV series) | |||
| B2 [ All SMA (M) ] | F2 [ Negative Control Voltage ] / (-HV series) | |||
| F3 [ Reverse Control Voltage (0V = Max Attenuation)] / (-HV series) | ||||
| Control
Connector (-HV series) |
F3 [ Inverse Logic ("00.....00" = Max Attenuation)] / (-HD series) | |||
| C1 [ SMC (Jack), 50 Ω ] |
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Attenuation Range (select this option when less than 60dB attenuation is needed) |
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| C2 [ SMB (Jack), 50 Ω ] |
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G1 [ 30dB Attenuation Range Max] | ||
| G2 [ 40dB Attenuation Range Max] | ||||
| C3 [ SMA(F) ] | G3 [ 50dB Attenuation Range Max] | |||
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Control Impedance |
Other Options (Consult Factory) |
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| D1 [ 50 Ω, Internally Terminated ] |
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- Other Transfer Functions (-HV series) | ||
| - Higher/Lower Resolution (-HD series) | ||||
| Control
Function Resolution (-HD series) |
- Higher Power | |||
| E1 [ 9 Bit Positive Binary TTL ] | - Etc. | |||
| E2 [ 10 Bit Positive Binary TTL ] | ||||
| E3 [ 11 Bit Positive Binary TTL ] | ||||
| E4 [ 12 Bit Positive Binary TTL ] | ||||
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