Overlapping Timing Waveforms - HP 1652B Getting Started Manual

Overlapping
Timing
Waveforms
Since you see nothing wrong with the timing waveforms so far, you
think unstable data may be on the data lines during the read cycle. In
order to see unstable data, you must be able to see all the data lines
during the read and look for transitions. Overlapping the waveforms
allows you to do this. To overlap waveforms, follow these steps:
-
1. Place the cursor on the 00 of the ADDR 00 label and press
SELECT. The following pop-up opens in which you specify the bit
or bits of the address bus you want to overlap.
-0001 0004F6
8930 1.24 us
jjl+oooo] 008930 803C
1 .24 us
NO0 1 008932
OOFF I .24 us
+Qoo2 008934
67F8 I .28 us
MOO3 008936
803C I .24 us
6b000TIllNG
- Timing
naveforms X tcj Trigger 0 s'
Tlme/Div 71 Delay [of]
0 to
0 s Trigger
h
I 1 1 i I
Figure 21-12. Overlapping Timing Waveforms
2. Rotate the KNOB until all is displayed and press SELECT. All
the address bits will be overlapped on one line.
3. Repeat step 2 except overlap the data bits.
Timing/State Measurement Example
HP 16528/1653B
21-14
Front-Panel Reference