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General Radio 1021-P3B
Standard signal generator
General Radio 1021-P3B VHF Unit

Available from 1954 to 1965

Catalog History
 Document Year Page
Catalog M 1951 135
Catalog O 1956 93
Catalog P 1959 91
Catalog Q 1961 91
Catalog R 1963 124
Catalog S 1965 152
(All manuals in PDF format unless noted otherwise)

The General Radio 1021-P3B UHF Unit is part of the Type 1021-A series of Standard Signal Generators introduced in Catalog N (1954). It remained available through Catalog S (1965).

Type 1021-A models equipped with 1021-P3B were given the designation Type 1021-AV.


  • Carrier Frequency Range: 40 MHz to 250 MHz in 2 bands.
  • Frequency Calibration: Direct reading to ±1%.
  • Output Voltage: Continuously adjustable from 0.5 μV to 1.0 V, open-circuit.
  • Output Impedance: 50 Ω ±10%.