Hello Yamazaki, The 10 Ohm resistor function is to simulate the coin-cell battery voltage drop which typically is about 50 mV for 5 mA supply current.
This 10R will cause a voltage drop of 50 mV for 5 mA Rx Tx peak currents. For having this supply voltage drop, J24 has to be removed. When supplying from the LDO @ 1.5V (J23 open) the jumper J24 should be placed since the voltage drop from the 1.5V battery is much lower.
Hello Yamazaki,
The 10 Ohm resistor function is to simulate the coin-cell battery voltage drop which typically is about 50 mV for 5 mA supply current.
This 10R will cause a voltage drop of 50 mV for 5 mA Rx Tx peak currents. For having this supply voltage drop, J24 has to be removed.
When supplying from the LDO @ 1.5V (J23 open) the jumper J24 should be placed since the voltage drop from the 1.5V battery is much lower.
Normally we test with J24 always placed.
Best Regards,
JE_Dialog