Tektronix P6910, Instruction Manual

Page: 33 / 48

Reference
Table 3: 4X demultiplexing source-to channel assignments
Prime channels receiving SUT test data
Base connecting channel groups
136-channel logic
analyzer 102-channel logic
analyzer 68-channel logic
analyzer 34-channel logic
analyzer
C3:7-0 C2:7-0 C1:7-0
C0:7-0 C2:7-0 C1:7-0
C0:7-0 A3:7-0 A2:7-0
C2:7-0 A3:7-0 A2:7-0
C2:7-0
A1:7-0 A0:7-0 D1:7-0
D0:7-0 A0:7-0 D1:7-0
D0:7-0 A0:7-0 D1:7-0
D0:7-0
—
A3:7-0 A2:7-0 D3:7-0
D2:7-0 A2:7-0 D3:7-0
D2:7-0
— —
E3:7-0 E2:7-0 E1:7-0
E0:7-0
— — —
CLK:3 CLK:2 QUAL:3
QUAL:2
— — —
CLK:1 CLK:0 QUAL:1
QUAL:0 CLK:0 QUAL:1
QUAL:0
— —
When demultiplexing data there is no need to connect the destination channels to
the multiplexed bus. Data from the source channels are routed to the destination
channels internal to the logic analyzer.
Demultiplexing affects only the main memory for the destination channels. This
means that the MagniVu memory is
fi lled with data from whatever is connected to
the demultiplexing destination channel probe inputs. This provides an opportunity
to acquire high resolution MagniVu data on a few extra channels. Connecting the
demultiplexing destination channels to other signals will allow viewing of their
activity in the MagniVu memory but not the main memory.
Range recognizers
When using range recognizers, probe groups and probe channels must be in
hardware order.
Probe groups must be used from the most-signi fi cant probe group to the
least-signi fi cant probe group based on the following order:
C3 C2 C1 C0 E3 E2 E1 E0 A3 A2 D3 D2 A1 A0 D1 D0 Q3 Q2 Q1 Q0
CK3 CK2 CK1 CK0
Probe channels must be from the most-signi fi cant channel to the least-signi fi cant
channel based on the following order:
7 6 5 4 3 2 1 0
The above example assumes a 136-channel logic analyzer. The missing channels
in instruments with fewer than 136 channels are ignored. With merged modules,
range recognition extends across the
fi rst three modules: the master module
contains the most-signi fi cant channels.
P6910 General Purpose Probe Instruction Manual 19