|
|
|
|
Test Adherence to Standards
Last updated: May 8, 2002
The 8960 Series 10 is compliant with 3GPP 51.010 (formerly ETSI GSM 11.10).
Frequency Error and Phase Error
Standards Reference: 3GPP 51.010 (formerly ETSI GSM 11.10) sections 13.1 and 13.16.1
The method of test implemented by the test set's Phase and Frequency Error measurement conforms to the measurement method defined in 3GPP 51.010 (formerly ETSI GSM 11.10), section 13.1. For GPRS mobiles which support a single uplink timeslot or two adjacent uplink timeslots, the Phase and Frequency Error measurement conforms to 3GPP 51.010 (formerly ETSI GSM 11.10), section 13.16.1.
Transmitter Output Power and Burst Timing Error
Standards Reference: 3GPP 51.010 (formerly ETSI GSM 11.10) sections 13.3 and 13.16.2
To make a transmitter output power measurement that conforms to 3GPP 51.010 (formerly ETSI GSM 11.10) standards, perform a Power versus Time measurement with the desired setup. An ETSI compliant, transmitter output power (TXPower) result is available as a result of this measurement. Pass/fail checking of the Power versus Time mask is also available by using the Power versus Time measurement. The Burst Timing Error result is available for GSM and GPRS on the Call Setup screen and by issuing a query to the CALL subsystem (
CALL:STATus:TCHannel:TERRor?
for GSM,
CALL:STATus:PDTCH | PDTChannel:TERRor?
for GPRS).
For GPRS mobiles which support a single uplink timeslot or two adjacent uplink timeslots, the transmitter output power result conforms to 3GPP 51.010 (formerly ETSI GSM 11.10), section 13.16.2. When measuring two adjacent uplinks, each of these can have different power levels.
Making a faster transmitter output power measurement
An alternative method for testing the transmitter output power is using the TX Power measurement in the test set. The TX Power measurement implemented in the test set varies from the ETSI recommended method for measuring carrier power in terms of synchronization. The TX Power measurement synchronizes using RF amplitude synchronization instead of midamble synchronization. This was intentionally done to speed up the measurement, as this is one of the most common measurements performed in manufacturing. This alternative measurement technique is approximately four times faster than the synchronized method with the same accuracy. If the input signal meets the GSM Power versus Time characteristics, the TX Power measurement provides the same results as the Power versus Time - TX Power result (which is midamble synchronized and ETSI compliant).
Note that the output RF spectrum measurement makes the TX Power measurement as part of its measurement process.
Output RF Spectrum
Standards Reference: 3GPP 51.010 (formerly ETSI GSM 11.10) sections 13.4 and 13.16.3
The Output RF Spectrum due to Switching method of test conforms to ETSI GSM 11.10, section 13.4 at offsets < 1800 kHz. For GPRS mobiles which support a single uplink timeslot or two adjacent uplink timeslots, the measurement conforms to ETSI GSM 11.10, section 13.16.3 at offsets < 1800 kHz.
The Output RF Spectrum due to Modulation method of test conforms to 3GPP 51.010 (formerly ETSI GSM 11.10), section 13.4 at offsets < 1800 kHz. For GPRS mobiles which support a single uplink timeslot or two adjacent uplink timeslots, the measurement conforms to 3GPP 51.010 (formerly ETSI GSM 11.10), section 13.16.3 at offsets < 1800 kHz (when the Multi-Measurement Count - Modulation parameter is set to Off using
SETup:ORFSpectrum:COUNt:STATe[:SELected]
).
Making a faster ORFS measurement
When Multi-Measurement Count (Modulation) is greater than 1, the measurement is performed over 40 or more bits in each of the regions from bit 15 to 60 and bit 87 to 132 of the burst. In 3GPP 51.010 (formerly ETSI GSM 11.10), the measurement is only specified on the latter section of the burst.
Measuring on both the front and back of the burst has two advantages. First, this method provides two modulation measurements per burst, effectively doubling measurement speed. Secondly, it provides additional information regarding the spurious performance of the mobile.
The method of test in 3GPP 51.010 (formerly ETSI GSM 11.10) is based upon time-gated spectrum analysis; this technique only allows one measurement per burst. Modern DSP techniques employed in the test set makes it possible to measure more of the burst while still excluding the unwanted effects of the midamble and switching transients generated by burst modulation.
Measuring ORFS on GPRS mobiles using the BLER data connection type
The result of the Output RF Spectrum measurement relies on pseudo random data being present in the data field of the RF burst. When using the BLER data connection type, these data fields do not contain pseudo random data, therefore the results may not be representative.
Reference Sensitivity
Standards Reference: 3GPP 51.010 (formerly ETSI GSM 11.10) section 14.2
The method of test implemented by the test set's Bit Error measurement conforms to the measurement method defined in 3GPP 51.010 (formerly ETSI GSM 11.10), section 14.2. The Bit Error measurement is available for both GSM and GPRS.
Making a faster reference sensitivity measurement
An alternative method of test for making a Reference Sensitivity measurement is to use the Fast Bit Error (FBER) measurement in the test set. The FBER measurement is five times faster than the normal BER measurement.
The Fast Bit Error measurement is
not
applicable to GPRS.
Block Error Measurement
The Block Error (BLER) measurement which the test set provides is based on GPRS receiver tests defined in 3GPP 51.010 (formerly ETSI GSM 11.10), section 14.16.
The Block Error measurement is
not
applicable to GSM.
I/Q Tuning Measurement
The I/Q Tuning measurement is not an ETSI specified measurement.
The I/Q Tuning measurement is
not
applicable to GPRS.
Dynamic Power Measurement
The Dynamic Power measurement is not an ETSI specified measurement.
The Dynamic Power measurement is
not
applicable to GPRS.
Analog Audio Measurements
The Analog Audio measurements are not ETSI specified measurements.
The Analog Audio measurements are
not
applicable to GPRS.
Spectrum Monitor Measurements
The Spectrum Monitor measurement is not an ETSI specified measurement.
Back to Top
|
