Heathkit H9 - CIRCUIT DESCRIPTION; BASIC OVERVIEW

E
Volts/cm
Time/cm
50USEC
(urucnl)seetexr
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