Texas Instruments TRF1500 - Manual (Page 64)

SWRA004A
TRF1500 Integrated Dual-Band RF Receiver User’s Guide 65
Low-Band Receiver Mixer Stand-Alone Test Guide
This section involves measuring the Low Band Receiver Mixer. All
unused ports will be terminated into 50
Ω
. Before measuring the
low band Mixer separately, the EVM board must be modified as
follows: Remove C12 and place C54. The EVM board is now
modified to use J15 as the input port of the Receiver Mixer.
Table 8. Low-Band Receiver Mixer Parameters
PARAMETERS Min Typ Max UNIT
Rx Mixer Input Frequency 869 881.5 894 MHz
LO frequency 979.52 992.02 1004.52 MHz
Rx Mixer Output Frequency 110.52 MHz
RF Input Power -30 dBm
LO Input Power -5 dBm
Power Conversion Gain 12 dB
RF Input Return Loss 9 dB
Power Leakage LO In at RF In -50 dB
Noise Figure 7.5 dB
1dB Input Compression Point -6 dBm
Third Order Input Intercept Point(IIP3) 3.5 dBm
Low-Band Receiver Mixer: Power Conversion Gain
Control state: 011000
SEE APPENDIX A: TEST BENCH SETUPS
Test setup Figure 20
The receiver mixer conversion gain (dB) is the measured power
(dBm) at the IF frequency minus the RF source power (dBm). It is
measured using a RF source and a spectrum analyzer.
1) Set the RF source power (RF P
in
) and the desired frequency
(see Table 8). Connect the RF source to the EVM RF port,
J15.
2) Set the LO source power (LO P
in
) and the desired frequency
(see Table 8). Connect the LO source to the EVM LO input
port, J12.
3) Set the spectrum analyzer to measure at the IF frequency (see
Table 8).
4) Connect the EVM IF output port, J11, to the spectrum
analyzer.