Atec Rohde-Schwarz-SMIQ Series - Manual (Page 23)

Vector Signal Generator R&S SMIQ – Specifications 23
Arbitrary waveform generator with option R&S SMIQB60
Bit error insertion generation of bit errors by impairment of data stream, either
before coding in case of active channel coding, or otherwise at
the physical layer
Parameter
Bit error rate (nominal BER) 10 –1 to 10 –7 with display of resulting BER
Application verification of internal BER calculation to TS25.141
(BS conformance testing)
Block error insertion generation of block errors by impairment of CRC during coding of
enhanced channels
Parameter
Block error rate (nominal BLER) 10 –1 to 10 –4 with display of resulting BLER
Application verification of internal BLER calculation to TS25.141
(BS conformance testing)
Orthogonal channel noise simulation (OCNS) Simulation of orthogonal background or interference channels for
enhanced channels of a base station.
If this feature is activated, 16 DPCHs according to TS25.241,
4.1.0, table C.6 are added. The total power of the OCNS part is
adjusted automatically in order to achieve a total power of 0 dB.
Applications – test of mobile receiver under realistic conditions
– measurement of maximum input level to TS25.101
Additional mobile stations Simulation of up to 64 mobile stations in addition to the four user-
configurable mobile stations of option R&S SMIQB45. The scram-
bling codes of the additional mobiles differ from one another.
Parameters
Number of additional MS 1 to 64
Scrambling code step 1 to 1000 hex
Power offset –20 to 20 dB
Applications base station test under realistic receiving conditions
Requirements for installation of option R&S SMIQB48 R&S SMIQxxB with options R&S SMIQB20, R&S SMIQB45,
R&S SMIQB11.
Maximum sequence length of enhanced channels requires maxi-
mum memory extension of data generator, ie two options
R&S SMIQB12.
Waveform memory, interpolation
Output memory
Length of waveform 1 to 524216 in steps of one sample
Note: The specified waveform length cannot be directly compared with the relevant data of conventional ARB generators.
In R&S SMIQB60, the oversampling needed for suppressing repetitive spectra by means of the analog filter is effected
automatically and in realtime by way of hardware interpolation, ie the stored waveform is not extended by the oversam-
pling factor. For W-CDMA signals, for example, oversampling of only 1.62 is needed. This compares with a conventional
ARB with oversampling of 4, meaning that R&S SMIQB60 output memory capacity corresponds to 1.25 Msamples.
Resolution
Loading time for 512k I/Q samples
Nonvolatile memory
Number of blocks
Block size
Interpolation
Interpolation bandwidth ( −0.1dB)
Repetitive spectra suppression through analog filter
12 bit
4 s
22 (one waveform occupies at least one block)
65527
0.375 x clock rate
>70 dB