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13 Modulation Accuracy (Composite EVM) Measurement
Meas Setup
If the Device is set to MS, this label changes to Slot Format to define the DPCCH pilot pattern to
synchronize with. It allows you to enter either 0 or 2 slot formats.
The BTS scramble code number (Downlink) is determined by the “Primary Scramble Code”, “Scramble
Code Offset” and “Scramble Code Type”.
The following information is an excerpt from TS25.213 Section 5.2.2 Scramble Code.
A total of 218–1 = 262,143 scrambling codes, numbered 0…262,142, can be generated. However, not all
the scrambling codes are used. The scrambling codes are divided into 512 sets, each consisting of a
primary scrambling code and 15 secondary scrambling codes.
The primary scrambling codes consist of scrambling codes n = 16*i where i = 0…511. The i:th set of
secondary scrambling codes consists of scrambling codes 16*i + k, where k = 1…15.
There is a one-to-one mapping between each primary scrambling code and the 15 secondary scrambling
codes in a set such that i:th primary scrambling code corresponds to i:th set of secondary scrambling
codes.
Hence, according to the above, scrambling codes k = 0, 1, …, 8191 are used. Each of these codes is
associated with a left alternative scrambling code and a right alternative scrambling code that may be
used for compressed frames. The left alternative scrambling code corresponding to scrambling code k is
scrambling code number k + 8192, while the right alternative scrambling code corresponding to scrambling
code k is scrambling code number k + 16384. The alternative scrambling codes can be used for
compressed frames. In this case, the left alternative scrambling code is used if n < SF/2, and the right
alternative scrambling code is used if n ≥ SF/2, where cch,SF,n is the channelization code used for non-
compressed frames. The usage of an alternative scrambling code for compressed frames is signaled by
higher layers for each physical channel respectively.
The Primary Scramble Code corresponds to i (i = 0 … 511), the Scramble Code Offset corresponds to k (k =
1 … 15: Secondary Scramble Code, 0: Primary Scramble Code) and the Scramble Code Type Left and Right
correspond to+8192 and +16384 offsets respectively.
Key Path
Meas Setup
Mode
WCDMA
Remote Command
[:SENSe]:RHO:SYNC:SCRamble[:BTS] <integer>
[:SENSe]:RHO:SYNC:SCRamble[:BTS]?
Example
RHO:SYNC:SCR 100
RHO:SYNC:SCR?
Notes
This command is effective when [:SENSe]:RADio:DEVice is set to BTS.
Preset
0
State Saved
Saved in instrument state.
Min
0
Max
511
Initial S/W Revision
Prior to A.02.00
Modified at S/W Revision
A.10.01
W-CDMA & HSPA Measurement Applications Reference
2075
Summary of Contents for E6640A
Page 80: ...Table of Contents lxxx W CDMA HSPA Measurement Applications Reference ...
Page 188: ...3 Programming the Test Set Common Commands 188 W CDMA HSPA Measurement Applications Reference ...
Page 256: ...5 Mode Functions Mode Setup 256 W CDMA HSPA Measurement Applications Reference ...
Page 324: ...6 System Functions System 324 W CDMA HSPA Measurement Applications Reference ...
Page 369: ...8 Channel Power Measurement Auto Couple W CDMA HSPA Measurement Applications Reference 369 ...
Page 389: ...8 Channel Power Measurement Marker W CDMA HSPA Measurement Applications Reference 389 ...
Page 664: ...9 ACP Measurement Auto Couple 664 W CDMA HSPA Measurement Applications Reference ...
Page 669: ...9 ACP Measurement BW W CDMA HSPA Measurement Applications Reference 669 ...
Page 984: ...9 ACP Measurement View Display 984 W CDMA HSPA Measurement Applications Reference ...
Page 1001: ...10 Spectrum Emission Mask Measurement W CDMA HSPA Measurement Applications Reference 1001 ...
Page 1668: ...12 Code Domain Measurement Auto Couple 1668 W CDMA HSPA Measurement Applications Reference ...
Page 2354: ...14 QPSK EVM Measurement 2354 W CDMA HSPA Measurement Applications Reference ...
Page 2364: ...14 QPSK EVM Measurement Auto Couple 2364 W CDMA HSPA Measurement Applications Reference ...