ThinkRF WSA5000 Series, Programmer'S Manual, Page: 72 / 101

SCPI Command Set
:TRACe:SPPacket command. The data within a single block capture trace is continuous
from one packet to the other, but not necessary between successive block capture
commands issued.
Syntax :TRACe:BLOCk:DATA?
Parameter None
Response Control port 37001: empty string
Data port 37000: <NRr>
Output Data Type Hexadecimal bytes
*RST State N/A
Examples :TRACE:BLOCK:DATA?
Note: The status of the query will be return through the control port 37001 as usual,
however the data will be returned through the data port 37000. Once the
:TRACe:BLOCk:DATA? command is issued, a block of SPP * PACKets of data will be
returned. In other words, :TRACe:BLOCk:DATA? needs to be sent only once to get SPP
* PACKets block of data.
The returned data in each VRT packet is presented in continuous hexadecimal chunk, as
shown here:
Response <NRr> ::= <VRT header bytes>{<data payload bytes>}
[<4 bytes VRT trailer>]
Further description on the VRT data output formats can be found in the VRT's IF Data
Packet Class section, page 37 .
:TRACe:BLOCk:PACKets
This command sets or queries the total number of packets set in the WSA. The
maximum is limited by the storage capacity of a WSA5000 and the samples per packet
(SPP) size set through
:TRACe:SPPacket . Therefore, when :TRACe:BLOCk:PACKets?
MAX query command is sent, the returned value will vary depending on the SPP value of
a WSA and the data output format. For example, the WSA5000 has 128 MBytes storage
capacity, if SPP is 32768 with I
14
Q
14
output format, then the maximum packet size is 1023
(or 128 MB / (4 bytes-per-sample * (32768 + 6))). If I
14
is the output format, then the
maximum is 2047 (or 128 MB * / (2 bytes-per-sample * (32768 + 6))).
In single block capture mode, this command is used in conjunction with the
:TRACe:SPPacket command to set the total number of samples to capture. In other
words, the data from one packet to the next within a single block capture mode is
continuous.
Syntax :TRACe:BLOCk:PACKets <integer>
:TRACe:BLOCk:PACKets? [MAX | MIN]
Parameter <input packet value>
[MAX | MIN]
for query1 – (WSA's max storage storage capacity
÷ (# bytes-per-sample * (SPP value + 6 Header and trailer words)))
Input Data Type Integer | Character
Allowable Values 1 – (WSA's max storage storage capacity ÷ (# bytes-per-sample *
72 ThinkRF WSA5000 Wireless Signal Analyzer Programmer's Guide