Standard Model

Turns Counting Dial

Knob Control Option

Direct Reading dB Option

• Standard Option: 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: AF068Ka-10
• 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 AV068Ka-10 would be changed to: AV868Ka-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 AV068Ka-10 would be changed to: AV968Ka-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 AV068Ka-10 would be changed to: AV768Ka-10, if ordering this unit with the Direct Reading in dB Option. ( In short, the section of P/N: AV0, is substituted with: AV7 )