Table 1-2: The Number Of Available Physical Channels - Tektronix DTG5078 User Manual

Data Structure
Logical Channel
Physical Channel
1-6
The data timing generator has two types of channels: logical and physical. Logical
channels represent one-bit width pattern data. The number of logical channels is 32
(4 channels x 8 slots) for DTG5078, or 8 (2 channels x 4 slots) for DTG5274 and
DTG5334.
Logical channels themselves do not have the concept of length. The length of the
pattern data on a logical channel is the block size defined in the Blocks window.
Each piece of the pattern data has a value of 0 or 1. To create the pattern data, you
can use the Data-Listing or Data-Waveform window.
One of the key features of the data timing generator is that each logical channel has
its attribute value of the output setting parameters such as the output level, pulse
width or delay time. You can set these parameters using the Level and/or Timing
windows.
Physical channels are defined as the hardware channels of an output module
installed in the data timing generator mainframe.
The number of physical channels available for the system is determined by the
mainframe type and the types and number of output modules installed. Refer to
Table 1-2.

Table 1-2: The number of available physical channels

Output module
(on module)
DTGM10 (4)
DTGM20 (4)
DTGM21 (4)
DTGM30 (2)
DTGM31 (1)
DTGM32 (1)
The DTG5000 software has the output setup parameters, such as the output level
or clock frequency, in its logical channels. To output actual data pattern outputs, do
the following:
Specify the physical channels to output the data within the logical channels.
Send the output setup parameter to the physical channels to operate the
hardware properly.
To associate the logical channel with physical channel (this is also called channel
assignment), use the Channel Group window. Refer to "Window Operation 4" in
the User Manual 1.
DTG5078 & DTG5274 & DTG5334 Data Timing Generator User Manual 2
DTG5078 DTG5274, DTG5334
4 2
4 2
4 2
2 2
1 1
1 1