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Directional Coupler Implementation

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HardwareChap

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I'm going to use an RF coupler to feed the transmit into the receive (in a TDM system) to measure power. I'm planning on using:

https://www.minicircuits.com/pdfs/DCW-30-272+.pdf

For the external termination resistor, should I use a 50 Ω resistor?

I'm feeding 30 dBm @ 1.4 GHz into pin 1 (input), so, should I see ≈ 29.87 dBm at pin 6 (output) and 2.4 dBm at pin 3 (coupled)
 

Yes, it should be terminated with a 50Ohm resistor with minimum parasitics. Output powers are correct, however you may experience loss due to microstrip lines.
 

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