Texas Instruments TRF2436EVM manual RX Operation, Physical Description

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Physical Description

2.2RX Operation

1.Set TR (J13) to logic 0.

2.Set PA_A SEL (J10) to logic 0.

3.Connect a differential LO source to the LOP/LON SMAs (or use an external balun).

Set the LO to an appropriate frequency, with the power level between 0 to +4 dBm. Remember that for A-band operation, the LO input frequency is doubled inside the TRF2436; so, the LO should be set to half the frequency desired at the mixer LO port.

4.For mixer stage measurement:

a.Terminate RFA (J9) and RFANTA (J6) into 50 Ω.

b.Connect an RF source to MFA (J8). Set to a desired RF frequency and typical power level of –20 dBm.

c.Connect a spectrum analyzer to the IF (J7) output.

d.Turn on the 3.3-V power supply (~90 mA).

e.Observe the IF output on a spectrum analyzer (374 MHz).

5.For LNA stage measurement:

a.Terminate IF (J7) and MFA (J8) into 50 Ω.

b.Connect an RF source to RFANTA (J6). Set to a desired frequency and typical power level of –40 dBm.

c.Connect a spectrum analyzer to RFA (J9).

d.Turn on the power supply.

e.Observe the LNA output on a spectrum analyzer.

f.Use jumper J14 (RXDGC) to select between LNA high (pins 2-3) and low gain (pins 1-2) modes.

3Physical Description

This section describes the physical characteristics and PCB layout of the EVM and lists the components used on the module.

SLWU038 –August 2006 TRF2436EVM 3

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