Standard

Model

Turns Counting Dial

Option

Knob Control

Option

Direct Reading in dB

Option

• Standard Model: Models utilize a 1/4” dia. multi-turn screwdriver-slotted shaft adjustment of the mechanical lead-screw 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: AF074-10

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 AV074-10 would be changed to: AV874-10, 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 AV074-10 would be changed to: AV974-10, 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 tape-driven 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 anti-backlash 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 AV074-10 would be changed to: AV774-10, 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: AF774-10 (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: AV774-10/3.6 (Calibration 3.6 GHz)

• Motor Drive option available for remote applications.

GENERAL SPECIFICATIONS

07 SERIES CVA

Applicable Mil-Specs

Designed to meet or exceed: MIL-DTL-24215

Electrical

RF Power: 7W average, 3kW peak

RF Connectors: SMA Standard, For Type-N, 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 MIL-F-14072

Weight: 2.5oz / 71gm (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

Standard
Model

Turns Counting Dial Option

Knob Control
Option

Direct Reading
in dB Option

• Standard Model Models utilize a 1/4” dia. multi-turn screwdriver-slotted shaft adjustment of the mechanical lead-screw 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: AF082-10

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 AV082-10 would be changed to: AV882-10, 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 AV082-10 would be changed to: AV982-10, 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 tape-driven 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 anti-backlash 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 AV082-10 would be changed to: AV782-10, 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: AF782-10 (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: AV782-10/0.6 (Calibration 0.6 GHz)

• Motor Drive option available for remote applications.

GENERAL SPECIFICATIONS

08 SERIES CVA

Applicable Mil-Specs

Designed to meet or exceed: MIL-DTL-24215

Electrical

RF Power: 7W average, 3kW peak

RF Connectors: SMA Standard, For Type-N, 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 MIL-F-14072

Weight: 5.2oz / 150gm

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