Figure 14.
Connecting to the RF test points with the SMB adapter
it is listed what typical power levels can be expected while the ST25RU3993-EVAL board is
operating in its default configuration.
Table 19.
RF test points - default power levels
RF test
point
Description
Typical RF power level
RF-TP1
ST25RU3993 RF output signal (single-ended). Measure here to evaluate the power
and the spectral properties of the RF signal at the 0-dBm output. This RF signal is
the input for the external power amplifier.
-1.9 dBm
RF-TP2
External power amplifier RF output signal. Measure here to evaluate the power, Gain
and the spectral properties of the RF signal at the output of the external power
amplifier.
30.7 dBm
RF-TP3
Internal power amplifier RF output signal (single-ended). Measure here to evaluate
the power and the spectral properties of the RF signal at the output of the internal
power amplifier.
20.5 dBm
RF-TP4
RX signal. Measure here to evaluate the self-jammer signal or a RN16 tag response.
-14.5 dBm
-25 dBm (with Poynting
Patch-25 connected to
antenna port 1)
1. Internal power amplifier.
UM2353
Test points
UM2353
-
Rev 2
page 22/48
Summary of Contents for ST25RU3993-EVAL
Page 25: ...Figure 16 Schematic of UHF RFID reader device UM2353 Rev 2 page 25 48 UM2353...
Page 26: ...Figure 17 Schematic of external power amplifier UM2353 Rev 2 page 26 48 UM2353...
Page 28: ...Figure 20 Schematic of USB supply UART bridge UM2353 Rev 2 page 28 48 UM2353...
Page 29: ...Figure 21 Schematic of microcontroller UM2353 Rev 2 page 29 48 UM2353...
Page 30: ...Figure 22 Schematic of supply LDOs UM2353 Rev 2 page 30 48 UM2353...
Page 31: ...Figure 23 Schematic of external interfaces and connections UM2353 Rev 2 page 31 48 UM2353...
Page 32: ...Figure 24 Schematic of BT classic module UM2353 Rev 2 page 32 48 UM2353...
Page 33: ...Figure 25 Schematic of RF shield UM2353 Rev 2 page 33 48 UM2353...
Page 39: ...8 4 GND layer Figure 30 Layout GND layer UM2353 GND layer UM2353 Rev 2 page 39 48...