13.9 Output RF spectrum for MS supporting the R-GSM or ER-GSM frequency band

3GPP51.010-1Mobile Station (MS) conformance specificationPart 1: Conformance specificationTS

13.9.1 Definition

The output RF spectrum is the relationship between the frequency offset from the carrier and the power, measured in a specified bandwidth and time, produced by the MS due to the effects of modulation and power ramping.

13.9.2 Conformance requirement

1. The level of the output RF spectrum due to modulation shall be no more than that given in 3GPP TS 05.05, subclause 4.2.1, table a) for R-GSM 900 and ER-GSM 900 with the following lowest measurement limits:

– -36 dBm below 600 kHz offset from the carrier;

– -51 dBm for R-GSM 900 and ER-GSM 900 from 600 kHz out to less than 1 800 kHz offset from the carrier;

– -46 dBm for R-GSM 900 and ER-GSM 900 at and beyond 1 800 kHz offset from the carrier;

but with the following exceptions at up to -36 dBm:

– up to three bands of 200 kHz width centred on a frequency which is an integer multiple of 200 kHz in the combined range 600 kHz to 6000 kHz above and below the carrier;

– up to 12 bands of 200 kHz width centred on a frequency which is an integer multiple of 200 kHz at more than 6 000 kHz offset from the carrier.

1.1 Under normal conditions; 3GPP TS 05.05, subclause 4.2.1.

1.2 Under extreme conditions; 3GPP TS 05.05, subclause 4.2.1; 3GPP TS 05.05, annex D in subclauses D.2.1 and D.2.2.

2. The level of the output RF spectrum due to switching transients shall be no more than given in 3GPP TS 05.05, subclause 4.2.2, table "a) Mobile Station:".

2.1 Under normal conditions; 3GPP TS 05.05, subclause 4.2.2.

2.2 Under extreme conditions; 3GPP TS 05.05, subclause 4.2.2; 3GPP TS 05.05 annex D in subclauses D.2.1 and D.2.2.

3. When allocated a channel, the power emitted by the MS, in the band 935 MHz to 960 MHz shall be no more than -79 dBm, in the band 925 MHz to 935 MHz shall be no more than -67 dBm, in the band 921 MHz to 925 MHz shall be no more than -60 dBm and in the band 1 805 MHz to 1 880 MHz shall be no more than ‑71 dBm except in five measurements in each of the bands 925 MHz to 960 MHz and 1 805 MHz to 1 880 MHz where exceptions at up to -36 dBm are permitted. Under normal conditions; 3GPP TS 05.05, subclause 4.3.3.

13.9.3 Test purpose

1. To verify that the output RF spectrum due to modulation does not exceed conformance requirement 1.

1.1 Under normal conditions.

1.2 Under extreme conditions.

2. To verify that the output RF spectrum due to switching transients does not exceed conformance requirement 2 when a reasonable margin is allowed for the effect of spectrum due to modulation.

2.1 Under normal conditions.

2.2 Under extreme conditions.

3. To verify that the MS spurious emissions in the MS receive band do not exceed conformance requirement 3.

13.9.4 Method of test

13.9.4.1 Initial conditions

A call is set up according to the generic call set up procedure.

The SS commands the MS to hopping mode. The hopping pattern includes only three channels, namely one with an ARFCN in the Low R-GSM or ER -GSM ARFCN range, a second one with an ARFCN in the Mid ARFCN range and the third one with an ARFCN in the High ARFCN range.

NOTE 1: Although the measurement is made whilst the MS is in hopping mode, each measurement is on one single channel.

NOTE 2: This test is specified in hopping mode as a simple means of making the MS change channel, it would be sufficient to test in non hopping mode and to handover the MS between the three channels tested at the appropriate time.

The SS commands the MS to complete the traffic channel loop back without signalling of erased frames (see subclause 36.2.1.1). This is to set a defined random pattern for the transmitter.

The SS sends Standard Test Signal C1 (annex 5) to the MS at a level of 23 dBVemf(  ).

13.9.4.2 Procedure

NOTE: When averaging is in use during frequency hopping mode, the averaging only includes bursts transmitted when the hopping carrier corresponds to the nominal carrier of the measurement.

a) In steps b) to h) the FT is equal to the hop pattern ARFCN in the Mid ARFCN range.

b) The other settings of the spectrum analyser are set as follows:

– Zero frequency scan;

– Resolution bandwidth: 30 kHz;

– Video bandwidth: 30 kHz;

– Video averaging: may be used, depending on the implementation of the test.

The video signal of the spectrum analyser is "gated" such that the spectrum generated by at least 40 of the bits 87 to 132 of the burst is the only spectrum measured. This gating may be analogue or numerical, dependent upon the design of the spectrum analyser. Only measurements during transmitted bursts on the nominal carrier of the measurement are included. The spectrum analyser averages over the gated period and over 200 or 50 such bursts, using numerical and/or video averaging.

The MS is commanded to its maximum power control level.

c) By tuning the spectrum analyser centre frequency to the measurement frequencies the power level is measured over 50 bursts at all multiples of 30 kHz offset from FT to < 1 800 kHz.

d) The resolution and video bandwidth on the spectrum analyser are adjusted to 100 kHz and the measurements are made at the following frequencies:

– on every ARFCN from 1 800 kHz offset from the carrier to the edge of the relevant transmit band for each measurement over 50 bursts.

– at 200 kHz intervals over the 2 MHz either side of the relevant transmit band for each measurement over 50 bursts.

– at 200 kHz intervals over the band 921 MHz to 960 MHz for each measurement over 50 bursts.

– at 200 kHz intervals over the band 1 805 MHz to 1 880 MHz for each measurement over 50 bursts.

e) The MS is commanded to its minimum power control level. The spectrum analyser is set again as in b).

f) By tuning the spectrum analyser centre frequency to the measurement frequencies the power level is measured over 200 bursts at the following frequencies:

FT;

FT + 100 kHz FT – 100 kHz;

FT + 200 kHz FT – 200 kHz;

FT + 250 kHz FT – 250 kHz;

FT + 200 kHz  N FT – 200 kHz  N;

where N = 2, 3, 4, 5, 6, 7, and 8;

and FT = RF channel nominal centre frequency.

g) The spectrum analyser settings are adjusted to:

– Zero frequency scan;

– Resolution bandwidth: 30 kHz;

– Video bandwidth: 100 kHz;

– Peak hold.

The spectrum analyser gating of the signal is switched off.

The MS is commanded to its maximum power control level.

h) By tuning the spectrum analyser centre frequency to the measurement frequencies the power level is measured at the following frequencies:

FT + 400 kHz FT – 400 kHz;

FT + 600 kHz FT – 600 kHz;

FT + 1,2 MHz FT – 1,2 MHz;

FT + 1,8 MHz FT – 1,8 MHz;

where FT = RF channel nominal centre frequency.

The duration of each measurement (at each frequency) will be such as to cover at least 10 burst transmissions at FT.

i) Step h) is repeated for power control levels 7 and 11.

j) Steps b), f), g) and h) are repeated with FT equal to the hop pattern ARFCN in the Low R-GSM or ER -GSM ARFCN range except that in step g) the MS is commanded to power control level 11 rather than maximum power.

k) Steps b), f), g) and h) are repeated with FT equal to the hop pattern ARFCN in the High ARFCN range except that in step g) the MS is commanded to power control level 11 rather than maximum power.

l) Steps a), b), f), g) and h) are repeated under extreme test conditions (annex 1, TC2.2). except that at step g) the MS is commanded to power control level 11.

13.9.5 Test requirements

For absolute measurements, performed on a temporary antenna connector, in the frequency band 876 MHz to 915 MHz or 1 710 MHz to 1 785 MHz, the temporary antenna connector coupling factor, determined according to subclause 13.3.4.2.2 and annex 1 GC7, for the nearest relevant frequency, will be used.

For absolute measurements, performed on a temporary antenna connector, in the frequency band 921 MHz to 960 MHz, the temporary antenna connector coupling factor, will be as determined according to annex 1 GC7 for GSM 900 MS

For absolute measurements, performed on a temporary antenna connector, in the frequency band 1 805 MHz to 1 880 MHz for R-GSM 900 or ER-GSM 900 MS 0 dB will be assumed.

The figures in the tables below, at the listed frequencies from the carrier (kHz), are the maximum level (dB) relative to a measurement in 30 kHz bandwidth on the carrier (reference 3GPP TS 05.05 subclause 4.2.1).

a) For the modulation sidebands out to less than 1 800 kHz offset from the carrier frequency (FT) measured in step c), f), h), j), k) and l) the measured power level in dB relative to the power level measured at FT, for all types of MS, shall not exceed the limits derived from the values shown in table 13.9-1 for R-GSM 900 or ER-GSM 900 according to the actual transmit power and frequency offset from FT. However any failures in the combined range 600 kHz to less than 1 800 kHz above and below the carrier may be counted towards the exceptions allowed in test requirements c) below.

Table 13.9-1a: R-GSM 900 Spectrum due to modulation out to less than 1 800 kHz offset

power levels in dB relative to the measurement at FT

Power level

Frequency offset (kHz)

(dBm)

0-100

200

250

400

600 to <1 800

39

+0,5

-30

-33

-60

-66

37

+0,5

-30

-33

-60

-64

35

+0,5

-30

-33

-60

-62

<= 33

+0,5

-30

-33

-60

-60

The values above are subject to the minimum absolute levels (dBm) below.

-36

-36

-36

-36

-51

NOTE 1: For frequency offsets between 100 kHz and 600 kHz the requirement is derived by a linear interpolation between the points identified in the table with linear frequency and power in dB relative.

b) For the modulation sidebands from 1 800 kHz offset from the carrier frequency (FT) and out to 2 MHz beyond the edge of the relevant transmit band, measured in step d), the measured power level in dB relative to the power level measured at FT, shall not exceed the values shown in table 13.9-2 according to the actual transmit power, frequency offset from FT and system on which the MS is designed to operate. However any failures in the combined range 1 800 kHz to 6 MHz above and below the carrier may be counted towards the exceptions allowed in test requirements c) below, and any other failures may be counted towards the exceptions allowed in test requirements d) below.

Table 13.9-2: Spectrum due to modulation from 1 800 kHz offset to the edge
of the transmit band (wideband noise)

Power levels in

dB relative to the measurement at FT

R-GSM 900 or ER-GSM 900

Power level

(dBm)

Frequency offset kHz

1 800 to

3 000 to

>= 6 000

< 3 000

< 6 000

39

-69

-71

-77

37

-67

-69

-75

35

-65

-67

-73

<= 33

-63

-65

-71

The values above are subject to the minimum absolute levels (dBm) below

-46

-46

-46

c) Any failures (from a) and b) above) in the combined range 600 kHz to 6 MHz above and below the carrier should be re-checked for allowed spurious emissions. For each of the three ARFCN used, spurious emissions are allowed in up to three 200 kHz bands centred on an integer multiple of 200 kHz so long as no spurious emission exceeds -36 dBm. Any spurious emissions measured in a 30 kHz bandwidth which spans two 200 kHz bands can be counted towards either 200 kHz band, whichever minimizes the number of 200 kHz bands containing spurious exceptions.

d) Any failures (from b) above) beyond 6 MHz offset from the carrier should be re-checked for allowed spurious emissions. For each of the three ARFCN used, up to twelve spurious emissions are allowed so long as no spurious emission exceeds -36 dBm.

e) The MS spurious emissions in the bands 921 MHz to 925, 925 MHz to 935 MHz, 935 MHz to 960 MHz and 1 805 MHz to 1 880 MHz, measured in step d), for all types of MS, shall not exceed the values shown in table 13.9-3 except in up to five measurements in the band 925 to 960 MHz and five measurements in the band 1 805 MHz to 1 880 MHz where a level up to -36 dBm is permitted.

Table 13.9-3: Spurious emissions in the R-GSM MS or ER-GSM MS receive bands

Band

Spurious emissions level

Note

(MHz)

(dBm)

921 to 925

-60

For R-GSM MS

918 to 925

-60

For ER-GSM MS

925 to 935

-67

935 to 960

-79

Common Requirement

1 805 to 1 880

-71

f) For the power ramp sidebands of steps h) and i) the power levels must not exceed the values shown in table 13.9‑4 for GSM 900.

Table 13.9-4: R-GSM or ER-GSM Spectrum due to switching transients

Power level

Maximum level for various offsets from carrier frequency

400 kHz

600 kHz

1 200 kHz

1 800 kHz

39 dBm

-13 dBm

-21 dBm

-21 dBm

-24 dBm

37 dBm

-15 dBm

-21 dBm

-21 dBm

-24 dBm

35 dBm

-17 dBm

-21 dBm

-21 dBm

-24 dBm

33 dBm

-19 dBm

-21 dBm

-21 dBm

-24 dBm

31 dBm

-21 dBm

-23 dBm

-23 dBm

-26 dBm

29 dBm

-23 dBm

-25 dBm

-25 dBm

-28 dBm

27 dBm

-23 dBm

-26 dBm

-27 dBm

-30 dBm

25 dBm

-23 dBm

-26 dBm

-29 dBm

-32 dBm

23 dBm

-23 dBm

-26 dBm

-31 dBm

-34 dBm

<= +21 dBm

-23 dBm

-26 dBm

-32 dBm

-36 dBm

NOTE 2: These figures are different from the requirements in 3GPP TS 05.05 because at higher power levels it is the modulation spectrum which is being measured using a peak hold measurement. This allowance is given in the table.

NOTE 3: The figures for table 13.9-4 assume that, using the peak hold measurement, the lowest level measurable is 8 dB above the level of the modulation specification using the 30 kHz bandwidth gated average technique for 400 kHz offset from the carrier. At 600 and 1200 kHz offset the level is 6 dB above and at 1 800 kHz offset the level is 3 dB above. The figures for 1 800 kHz have assumed the 30 kHz bandwidth spectrum due to modulation specification at < 1 800 kHz.