For example: Agilent E4440A or Anritsu 68369
SIGNAL GENERATOR 10 MHz -20 GHZ

Model:SMR20-B1-B11-B14-B15

Manufactured by: Rohde and Schwarz

Category:Signal Generators

Rohde and Schwarz SMR20-B1-B11-B14-B15 Overview

SMR-B1 OCXO Reference Oscillator
SMR-B11 
Frequency Extension- extends the low-end frequency of the basic unit from 2 GHz down to 10 MHz
SMR-B14 Pulse Generator high-quality pulse generator featuring a pulse width and pulse delay of 20 ns to 1 s. 
SMR-B15 RF Attenuator 

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