Heathkit H9 Manual page 47

E
V o l ts / c m
T ime /c m
5 0 US E C ( u r u cn l ) se e t e x r
This is the basic troubleshooting waveform. It is
triggered externally (EXT) from Vp (+ trigger) or from
Vn' (- trigger). Decrease the horizontal sweep vernier
until the trace appears as shown. This puts each TPU
pulse (0 thru 7J in its own centimeter division (pulse 0
in the first division, through pulse 7 in the eighth
division, then a repeat of pulse 0 in the ninth division,
etc.). This lets you relate other timing sequences to
the various TPU cycles. Refer to the TPU Schematic
for the location of each TPU pulse test point.
ilJ
1-r
- 2
r
t_i_l
-L-2_r
LqJ
il-l-
ilr
-1j..^
V