Technical data

302 Chapter 19
TD-SCDMA Programming Commands
Power vs. Time (PvT)
TD-SCDMA Programming Commands
The following command is used to retrieve the Envelope Trace Results:
MEAS|READ| FETCh:LSEQuen cer:ACQuire{1.. .512}:ASTep{1.. .1000}:TDPVt:TR ACe?
TDSCDMA PVT trace results are trace envelope powers (averaged over time intervals of one chip
duration) in unit of dBm. They are comma-separated and the length is the trace sample number result in
the TDSCDMA PVT general results described above.
The following command is used to retrieve the Upper Limit Results:
MEAS|READ| FETCh:LSEQuen cer:ACQuire{1.. .512}:ASTep{1.. .1000}:TDPVt:UL IMit?
TDSCDMA PVT upper limit results are upper limit values of the trace results point by point in unit of
dBm. They are comma-separated and the length is the trace sample number result in the TDSCDMA
PVT general results described above.
10 Trace sample number is the number of data points in the merged envelop trace
data, which could be read by using
FETCh:LSEQuencer<l>:ACQuire<m>:ASTep<n>:TDPVt:TRACe?
Only up to 2000 envelop trace points can be returned. So, the envelop trace
returned may be decimated. If average is on and average number is N, this result
is calculated after N PVT traces are merged.
11 Off power before is the averaged power between the start time of the analysis
interval and the -34th chip before the burst start time. This value is used for the
limit check. The upper limit is -65 dBm. Though limited by analysis interval,
this result is derived from 8960 Tdscdma Transmit ON/OFF Power result:
Range 1 OFF Power, whereas it is the averaged power or the highest chip power
between -160th to -34th chips of the averaged trace for TS1, and -864th to -34th
chips of the averaged trace for UpPTS. If average is on and average number is
N, this result is calculated after N PVT traces are merged.
12 Average power over -33rd ~ -14th chip is the averaged power between -33rd
chip to -14th chip of the burst. This value is used for the limit check. Its upper
limit is -50 dBm. This result is derived from the 8960 Tdscdma Transmit
ON/OFF Power result: Range 2 OFF Power, which is the averaged or highest
chip power between -33rd to -14th chips of the averaged trace. If average is on
and average number is N, this result is calculated after N PVT traces are merged.
13 Off power after is the averaged power between the 860th chips to the end of the
analysis interval. This result is derived from the 8960 Tdscdma Transmit
ON/OFF Power result: Range 3 OFF Power, which is the averaged power
between 860th to 1711st chips of the averaged trace. If average is on and
average number is N, this result is calculated after N PVT traces are merged.
14 Max burst start time is the maximum start time of the burst referring to the start
of the analysis interval. If averaging is on and average number is N, this results
is the maximum value of the N burst start time results.