When used with a compatible SPM series level measuring set-up, the RFZ-12 enables measurements of return losses of balanced and unbalanced items-under-test simply and easily.  The RFZ-12 can be used up to 4.5 MHz.

It has built-in switchable reference impedances, to ensure simple operation, and high accuracy.

Specifications:
Frequency Range: 200 Hz to 4.5 MHz
Impedance Standards Balanced (integral, switchable): 124, 135, 150, 600ohms (unbalanced adds 75 ohms)
Attenuation at r=1 balanced items-under-test: 40 dB
Attenuation at r=1 unbalanced-items-under-test 46 dB
    

INCLUDES, AS PICTURED:
RFZ-12
RN-120  Standard Impedance Accessory with 3 pole CF plug
Termination, 3 pole