Texas Instruments TRF1500 - Manual (Page 51)

SWRA004A
52 TRF1500 Integrated Dual-Band RF Receiver User’s Guide
Low-Band Transmit Mixer Test Guide
This section involves measuring the Transmit Mixer performance.
All tests apply for an IF output terminated into a 1 k
Ω
differential
load. To match the IF output to the 50
Ω
test equipment a
transformer balun is used. All unused ports are terminated into 50
Ω
.
Table 5. Low-Band Transmit Performance Parameters
PARAMETERS Min Typ Max UNIT
Tx Mixer Input Frequency Range 824 836.5 849 MHz
LO Input Frequency Range 941 953.5 966 MHz
Tx Mixer IF Frequency 117 MHz
RF Input Power -30 dBm
LO Input Power -5 dBm
Power Conversion Gain 19 dB
Noise Figure 7.8 dB
Input Return Loss 9.8 dB
Power Leakage LO In to Tx In -49 dB
Power Leakage Tx In to LO In -70.6 dB
1dB Input Compression Point -20 dBm
Second Order Input intercept Point (IIP2) 29.5 dBm
Third Order Input Intercept Point(IIP3) -11.5 dBm
Low-Band Transmit Mixer: Power Conversion Gain
Control state: 010100
SEE APPENDIX A: TEST BENCH SETUPS
Test setup Figure 20
The low band transmit mixer 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.
1) Set the RF source power (RF P
in
) and the desired frequency
(see Table 5). Connect the RF source to the EVM RF port,
J30.
2) Set the LO source power (LO P
in
) and the desired frequency
(see Table 5). Connect the LO source to the EVM LO input
port, J12.