Digital[1|2|3|4]:Pattern:hdata - Tektronix PatternPro PPG1600 User Manual

:DIGital[1|2|3|4]:PATTern:HDATa

Form
Parameters
Value Coupling
Range Coupling
Default
Description
Example
PPG1600, PPG3000, & PPG3200 Pattern Generator User Manual
Set & Query
<start address>,<bit count>,<data>
<start address> is numeric, and is the bit number in pattern data memory of the first bit to write.
<bit count> is the number of bits to write into pattern data memory.
<data> is an arbitrary block of program data as defined in IEEE-488.2-1992, section 7.7.6.2. It
starts with a "#" character, followed by a single character representing the length of the length,
then 1 to 5 characters specifying the length as a decimal number, then the program data.
None
None
Default data is a 1 in position 1, all other bits are 0.
Programs the pattern data memory using hexadecimal character format. Each byte of pattern
data is a hexadecimal character (0-9, A-F or a-f) representing four bits of pattern data. The
start address can be any bit location, 1 – <max address>. <max address> is 4,194,304 for
one-channel instruments and 2,097,152 for a two-channel and four-channel instruments. The
bit count can be any number 1 – 4096. The entire pattern data memory is accessible for reads
or writes, even outside the range of the current pattern length setting.
The bit count parameter must be equal to 4 times the length of the data block or up to 3 bits
fewer. If it is fewer, then the extra bits in the last data byte are ignored. (<start address> +
<bit count>) must be ≤ (<max address> + 1).
:DIG1:PATT:HDAT 1,16,#144152
This command does the following:
Starts loading the Ch 1 data into bit location 1.
Specifies that 16 bits of data will be loaded.
In the <data>:
#: signifies the beginning of the block
1: indicates that the length of the data length is one character
4: indicates that data length is 4 bytes. (4 ASCII characters)
4152: is the character representation of the data
Thus, bits 1 through 16 in the channel 1 pattern data memory will be set to 0100000101010010.
:DIG1:PATT:HDAT? 1,8
This query reads 8 bits of channel 1 pattern data starting from address 1. Given the above
pattern data memory contents, the response would be "#1241".
Note that if the query requests a number of bits that is not a multiple of 4, some bits in the last
byte will not be meaningful, and will be 0.
Reference
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