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RF Transceiver Measurements

This page of RF Transceiver test procedure describes how to test RF Transceiver.It covers RF Transceiver measurements such as gain, 1dB compression point, spurious, harmonics, S parameters etc. This will help RF engineers testing transceiver specifications against compliance requirement using spectrum analyzer, signal generator and power meter.

RF Transceiver is the device which houses two parts transmitter and receiver. RF Transmitter carry modulated information in the form of voice/data/image/video over desired RF frequency to the distant end. RF Receiver demodulates the information from received RF signal and feed them to the demodulator part.

RF transceiver position

Figure mentions location of RF Transceiver in wireless communication system. As shown transmitter part is interfaced between modulator and power amplifier. It is referred as up converter. Receiver part is interfaced between LNA and demodulator and known as down converter.

Following table mentions useful RF transceiver measurements for C band application. The specifications are categorized into RF upconverter and RF downconverter parts.

Following RF Transceiver test procedure describes how to test RF Transceiver measurements outlined above.

RF Up converter Specifications Typical value
Output frequency Range 5.925 to 6.425 GHz
IF input frequency Range 52 to 88 MHz
RF Output 0 dBm
1dB compression point +3 dBm
Conversion Gain 20dB (min.)
Gain Flatness +/- 1 dB over +/-18 MHz
Gain Variation Within +/- 1 dB over 0 to 50 DegreeC
Gain adjustment 5dB
Spurious and harmonics output Better than -40dBc over +/-18 MHz
Gain Flatness +/- 1 dB over +/-18 MHz
Frequency Stability +/- 1*10-6 over temp. 0 to 50 DegreeC
Long Term Frequency Stability +/- 1*10-7 per day

RF Down converter Specifications Typical value
RF Input frequency Range 3.7 to 4.2 GHz
RF Output frequency Range 52 to 88 MHz
Conversion Gain 40 dB
Input level -40 dBm to -85 dBm
Gain Flatness +/- 1dB over +/- 18MHz
Gain Variation +/- 1dB over 0 to 50 DegreeC
Gain Adjustment 5dB
Noise Figure Better than 14 dB
Spurious Output Better than -40 dBc
Image rejection 50 dB min.

RF Transceiver Test Procedure-How to test RF Transceiver

All the above measurements are carried out using SNA or using combination of signal generator with power meter/spectrum analyzer. Refer RF measurement tutorial for more.


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Test Procedure

RF LNA Test Procedure, how to test LNA
RF SSPA Test Procedure, how to test SSPA
RF Transceiver Test Procedure, how to test transceiver

RF and Wireless Terminologies

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