Specifications

2-110 Fully Coded 3GPP W-CDMA Personality User’s and Programming Guide
Using Functions ESG Family Signal Generators
3GPP W-CDMA Base Station Performance Testing Option 200
2. Measure the Bit Error Ratio (BER) of the BS.
The controller or BER test platform is measuring the bit error ratio of the BS exposed to
the RF output of ESG 1 only. This process verifies that the BER of the BS is within
specification without the intermodulation products generated by the CW and
modulated interferers.
3. Record the first BER measurement result in the column titled, “Verification BER Value”
in Table 2-58.
4. Compare the measured BER value in the column titled, “Verification BER Value” with
the limits from the column titled, “Specification Limitations.”
• If the measured value is within the limits, continue to subsection 2.
• If the measured value is outside the limits, determine the cause of failure and repair
the BS. After repair, return to Step 1 of this subsection.
Subsection 2. Negative Frequency Offset Interferers Measurement
Complete the following steps to make negative frequency offset interferer IRR
measurements on your BS.
1. Adjust the amplitude of the fundamental W-CDMA signal to the required value.
Modify the amplitude of the W-CDMA stimulus to
−
115.0 dBm.
On ESG 1:
Press
Amplitude > −
115
> dBm.
2. Introduce the negative 10 MHz offset interferer from the RF signal generator and
negative 20 MHz offset interferer from the ESG 2 (relative to the center frequency of
the W-CDMA signal) in the frequency range 1920.0 to 1980.0 MHz. The amplitudes of
these interferers are
−
48 dBm.
On ESG 2:
Activate the RF output by pressing
RF On/Off (or executing the appropriate SCPI
command) until the RF ON annunciator is displayed.
On the external signal source:
a. Set the waveform type to CW.
b. Set the RF output frequency to 1940 MHz.
c. Set the RF amplitude to −48 dBm.
d. Activate the RF output.
3. Measure the BER of the BS.
The controller or BER test platform is measuring the bit error ratio of the BS in the
presence of the negative frequency offset interferers.