19/02/2015
Atm Inc. Coax Components > Attenuators, Continously Variable (CVA)
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Attenuators, Coaxial
Continuously Variable Miniature (CVA) models
ATM manufactures a wide variety of Continuously Variable, Level Set, and Low Frequency "CVA"
Attenuators. While there exists some overlap in performance between different models, careful
review of the mechanical outline drawings and the corresponding tables should reveal the right
model. As always, please feel to call us and discuss your needs with one of our design engineers.
Note: Throughout this page "CVA" may be used to mean: Continuously Variable Attenuator.
See Also:
Coax Attenuators, Variable, LowFreq.
Coax Attenuators, Variable, Med. High
Power
Coax Attenuators, Variable, Motor Driven
Coax Attenuators, Fixed
Coax Attenuators, Step
W/G Attenuators, Fixed
06 Series Continuously Variable Attenuators
Standard
Model
Turns Counting Dial
Option
Knob Control
Option
Direct Reading in dB
Option
Standard Option: Models utilize a 1/4” dia. multiturn screwdriverslotted shaft adjustment of the mechanical leadscrew drive. A
split bearing and locknut arrangement provide for vibration and shock proof positioning of the attenuation control shaft. The
standard option is mostly used in applications where dB value needs to be set within 0.025dB or better. The shaft is then locked
to hold the setting until a readjustment is needed.
Standard Model Example P/N: AF06410
Other Options:
Turns Counting Dial Option: Substitutes a 30 turn counting dial for the Standard Option configuration. The turns counting dial
contains an integral lock, and is ideal for use directly attached to the attenuator, or for easy panel mounting. See outline drawing
for panel mounting information. The Turns Counting Dial is NOT in dB, it is a reference dial only. These Dials are used in
applications where dB values need to be reset. Calibration charts of dB vs. Dial setting can be supplied for an additional charge.
Important ordering note! This option requires changing the P/N as follows:
As an example, a Standard Option P/N AV06410 would be changed to: AV86410, if ordering this unit with the
Turns Counting Dial Option. ( In short, the section of P/N: AV0, is substituted with: AV8 )
Knob Control Option: is quite similar to the Standard Option but with an extended, slotted shaft and knob. This configuration is
very adaptable to panel mounting and hand control.
Important ordering note! This option requires changing the P/N as follows:
As an example, a Standard Option P/N AV06410 would be changed to: AV96410, if ordering this unit with the
Knob Control Option. ( In short, the section of P/N: AV0, is substituted with: AV9 )
Direct Reading in dB Option: These models are tapedriven and read directly in dB. This option is best used on
Frequency Flat Models “AF type” as the Dial accuracy will be determined by the attenuation vs. frequency spec.
For single frequency or narrow bands the Level Adjust Models “AV type” can be used and the spot frequency added to the P/N
(see below). Most direct reading attenuators have poor dial resolution due to single turn designs. ATM’s direct reading
attenuators utilize a unique antibacklash drive sprocket and calibrated steel tape assembly result in a long calibrated tape
passing thru a viewing window, allowing attenuation values of less than 0.2 dB to be set. Each attenuator is individually
calibrated, providing excellent accuracy, readability, high resolution, reliability and stability.
Important ordering note! This option requires changing the P/N as follows:
As an example, a Standard Option P/N AV06410 would be changed to: AV76410, if ordering this unit with the
Direct Reading in dB Option. ( In short, the section of P/N: AV0, is substituted with: AV7 )
Specifying spot frequencies:
Frequency flat models are ordered as:
Example P/N: AF76410 (Calibration for full band)
Level Adjust models add the desired calibration frequency (in GHz) after the P/N as shown in the following example:
Example P/N: AV76410/3.6 (Calibration at 3.6 GHz.)
Motor Drive option available for remote applications.
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19/02/2015
Atm Inc. Coax Components > Attenuators, Continously Variable (CVA)
GENERAL SPECIFICATIONS
06 SERIES CVA
Applicable MilSpecs
Designed to meet or exceed: MILDTL24215
Electrical
RF Power: 7W average, 3kW peak
RF Connectors: SMA Standard to 26.5
Type K [2.9mm] for models above 26.5 GHz
TypeN: add "N/F" to part number.
Insertion Loss:
to 18 GHz: 0.5dB max.
to 26 GHz: 0.75dB max.
to 40 GHz: 1.50dB max.
Mechanical
Dimensions: (click for Outline drawing)
Standard Model | Turns Counting | Knob | Tape Drive | Motor Drive
Body: Aluminum
Connectors: Stainless Steel
Finish: Unique corrosion resistant 316 stainless steel
epoxy coating IAW MILF14072 Color Dusty Grey
Weight: 2.0oz / 57 gm (standard model only)
Environmental
Temp: 55 / +110 °C
Shock: 15 G's, 11ms, 1/2 sine
Vibration: 3 G's overall
Altitude: 40,000ft. Survival 25,000ft Operating
06 Series CVA
Frequency Flat Models, Narrow Band
Freq (GHz)
Atten
VSWR Flatness
Model No.
Range dB
Max
+/ dB
3.4 4.2
10
1.5
0.5
AF065C310
3.4 4.2
20
1.5
1.0
AF065C320
3.6 6.5
10
1.5
0.8
AF065C10
3.6 6.5
20
1.5
1.5
AF065C20
3.6 4.3
10
1.5
0.3
AF065C110
3.6 4.3
20
1.5
0.5
AF065C120
5.8 6.5
10
1.5
0.3
AF065C210
5.8 6.5
20
1.5
0.5
AF065C220
5.8 6.5
30
1.5
1.0
AF065C230
7.2 8.4
10
1.5
0.5
AF065X10
7.2 8.4
20
1.5
1.0
AF065X20
7.2 8.4
30
1.5
1.5
AF065K30
7.2 7.8
10
1.5
0.25
AF065X110
7.2 7.8
20
1.5
0.5
AF065X120
7.2 7.8
30
1.5
0.75
AF065X130
7.9 8.4
10
1.5
0.25
AF065X210
7.9 8.4
20
1.5
0.5
AF065X220
7.9 8.4
30
1.5
0.75
AF065X230
10.7 12.7
10
1.5
0.5
AF066X10
10.7 12.7
20
1.5
0.8
AF066X20
10.7 12.7
30
1.5
1.2
AF066X30
10.7 14.5
10
1.5
1.0
AF066K10
10.7 14.5
20
1.5
1.5
AF066K20
10.7 14.5
30
1.5
1.75
AF066K30
12.4 18.0
10
1.5
1.0
AF06710
13.0 14.5
10
1.5
0.2
AF067K10
13.0 14.5
20
1.5
0.3
AF067K20
13.0 14.5
30
1.5
0.5
AF067K30
17.0 18.6
10
1.5
0.75
AF067J10
17.0 18.6
20
1.5
1.0
AF067J20
17.0 18.6
30
1.5
1.5
AF067J30
17.0 18.6
40
1.5
2.0
AF067J40
* Triband units, flatness spec is per band:
C (5.856.45GHz), X (7.98.4GHz), Ku (1414.5GHz)
06 Series CVA
Level Adjust Models, Octave Band Models
Freq (GHz)
2.0 4.2
3.7 8.0
3.7 8.0
7.9 12.7
7.9 12.7
7.9 12.7
11.7 18.0
11.7 18.0
11.7 18.0
11.7 18.0
14.0 26.5
14.0 26.5
14.0 26.5
14.0 26.5
26.5 40.0
26.5 40.0
26.5 40.0
26.5 40.0
Atten
Range dB
10
10
20
10
20
30
10
20
30
40
10
20
30
40
10
20
30
40
VSWR
Max
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.7
1.7
1.7
1.7
2.0
2.0
2.0
2.0
Flatness
+ dB
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Model No.
AV06410
AV06510
AV06520
AV06610
AV06620
AV06630
AV06710
AV06720
AV06730
AV06740
AV06810
AV06820
AV06830
AV06840
AV06910
AV06920
AV06930
AV06940
06 Series CVA
Level Adjust Models, Wide Band Models
Freq (GHz)
2.0 8.0
4.0 12.4
4.0 18.0
6.0 18.0
6.0 18.0
6.0 18.0
10.0 26.5
10.0 26.5
18.0 40.0
18.0 40.0
Atten
Range dB
10
10
10
10
20
30
10
20
10
20
VSWR
Max
1.5
1.5
1.5
1.5
1.5
1.5
1.8
1.8
2.0
2.0
Flatness
+ dB
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Model No.
AV064F10
AV065G10
AV065H10
AV066H10
AV066H20
AV066H30
AV066J10
AV066J20
AV068Q10
AV068Q20
06 Series CVA
Frequency Flat Models, Octave Band
Freq (GHz)
2.0 4.0
4.0 8.0
8.0 12.4
12.4 18.0
Atten
Range dB
10
10
10
10
VSWR
Max
1.6
1.5
1.5
1.5
Flatness
+/ dB
1.5
2.0
1.0
1.0
Model No.
AF06410
AF06510
AF06610
AF06710
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