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General Radio 1156-A
Decade scaler
General Radio 1156-A Decade Scaler

Available from 1965 to 1968

Catalog History
 Document Year Page
Catalog S 1965 125
Catalog T 1968 178
(All manuals in PDF format unless noted otherwise)

The General Radio 1156-A Decade Scaler was introduced in Catalog S (1965) and remained available through Catalog T (1968).

The 1156-A is a 10 to 1 divider used to pre-scale the input signal to a frequency meter or counter. Pairing the 1156-A to a GR counter is made easier by incorporating input and output connectors that can be relocated to the rear of the instrument. Included are covers for the relocated connector holes to make a clean installation.


  • Input: DC to 100 MHz
  • Output: DC to 10 MHz
  • Sensitivity: 0.1, 0.2, 0.5, and 1 Vp-p at 50 Ω; 1 Vp-p at 500 Ω
  • Input Impedance: 50 Ω or 500 Ω, switch-selected
  • Output Impedance: 250 Ω