Marki amplified quadruplers come in two different configurations. One is an amplifier followed by a quadrupler and another amplifier (AQA) and the other is a doubler followed by an amplifier followed by a doubler (DAD). The former offers higher output levels and better suppression of the fundamental while the latter offers better suppressions of the higher order harmonics. As with all multipliers and mixers, it is important to drive amplified quadruplers with the recommended drive level.
Electrical Specifications - Specifications guaranteed from -30 to +70°C, measured in a 50-Ohm system.
Parameter INPUT OUTPUT Min Typ Max
  (GHz) (GHz)      
Input (dBm)          
F(in) 5.0-12.5   +5   +8
Output Converted Power (dBm)          
4F(out)   20.0-47.0 +13 See  
    47.0-50.0 +9 Plot  
Suppressions (dBc)          
F(in) Fundamental   5.0-12.5   See  
2F(out) Second Harmonic   10.0-25.0   Plots  
3F(out) Third Harmonic   15.0-37.5      
Bias Requirements (mA) 1          
+5 Volts DC       400 500
-5 Volts DC       15 30
1The negative bias must be applied before or concurrent with the positive bias to avoid damage. A heat sink is required. Amplifier is NOT guaranteed to be unconditionally stable. Broadband 50 Ω loading conditions without feedback are required to prevent irrepairable damage.