7 Frequency stability

25.1433GPPRelease 17TSUTRA repeater conformance testing

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

Frequency error is the measure of the difference between the frequency of the received signal and the frequency of the re-transmitted signal.

7.1 Definition and applicability

The frequency stability is a measure of the frequency deviation of the output signal with respect to the input signal. The test shall address the uplink and the downlink path of the Repeater.

7.2 Minimum Requirement

In normal conditions as specified in section 5.4.1 the frequency deviation shall be within ± 0,01 ppm.

7.3 Test purpose

To verify that the Frequency Error is within the limit specified in 7.2.

7.4 Method of test

7.4.1 Initial conditions

1) Set-up the equipment as shown in annex A.

2) Connect the cw signal generator equipment to the Repeater input port.

3) Connect the frequency counter to the Repeater output port. Both the signal generator and the frequency counter shall use the same reference frequency.

4) Adjust the input power to the Repeater to create the maximum nominal Repeater output power as declared by the manufacturer at maximum gain.

7.4.2 Procedure

Measure the frequency error for both paths uplink and downlink of the Repeater.

7.5 Test requirements

The measurement result of 7.4.2 shall not exceed:

| f _IN – f out |  (f out * 0,01 ppm) + 12 Hz