Texas Instruments TRF1500 사용자 설명서
SWRA004A
26
TRF1500 Integrated Dual-Band RF Receiver User’s Guide
Low-Band Cascaded Test Guide
This section involves measuring the cascaded performance of the
Low Band LNA, Low Band MIXER and Low Band IF Amp. An
external SAW filter is utilized to complete the RF receiver section.
All tests apply for an IF output terminated into a 1 k
Low Band LNA, Low Band MIXER and Low Band IF Amp. An
external SAW filter is utilized to complete the RF receiver section.
All tests apply for an IF output terminated into a 1 k
Ω
differential
load. To match the differential IF output to the 50
Ω
test
equipment a transformer balun is used. All unused ports are
terminated into 50
terminated into 50
Ω
.
Table 3. LB LNA, LB Mixer, SAW Filter, and LB IF Amp Parameters
PARAMETERS
Min
Typ
Max
UNIT
RF Frequency Range
869
881.5
894
MHz
LO Frequency Range
979.52
992.02
1004.52
MHz
IF Frequency
110.52
MHz
RF Input Power
-30
dBm
LO Input Power
-5
dBm
Power Conversion Gain
26.0
dB
Power Conversion Gain Reduction
19.0
dB
Noise Figure
2.5
dB
RF Input Return Loss
5.6
dB
LO Input Return Loss
16.5
dB
LO Buffer Output Power
-10.3
dBm
Power Leakage LO In to RF In
-53.0
dBm
Third Order Input Intercept Point (IIP3)
-9.7
dBm
1dB RF Input Compression Point
-21.0
dBm
1dB Blocking Point
-18.0
dBm
LOW-Band Cascaded: Power Conversion Gain
Control state: 011000
SEE APPENDIX A: TEST BENCH SETUPS
Test setup Figure 20
The low band power 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.
(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 3). Connect the RF source to the EVM RF port,
J10.
J10.