3(.
FREQ
- Measures
the
frequency of
the
signal applied to
the CHANNEL B
1l\'PUT
jack
(16) and displays it on the
DIGITAL READOUT
(2).
The following four buttons measure only that port
of
the
wave·
form intensified by the Delta Measurement Bar. The posilian
of
the Delta Bar is controlled with the
I:J.
BEGIN control (19) and
I:J.
END
control PO}.
3g.
CH
;\
lJ.
PPV
- Measures
the
peak·to-peak voltage of
the
part
of
the
channel A
trace
intensified by the Delta
Bar
and
displays
the
valueon
the
DIGITAL READOUT
tn.
3h.
CII
B
lJ.
PPV - Measures
the
peak-to-peak voltage of
the
part
or
the
channel B
trace
intensified by the Delta
Bar
and
displays
the
valueon
the
DIGITAL READOUT
(2).
3i.
I:J.TIME
-Measures
the
time
duration
of
the
Delta
Bar
and
displays the resultson
the
DIGITAL READOUT
(2).
NOTE:
Only one button is needed for both channels because the
Delta Bar is positioned identically
in
both channels. The channel
A or B DIGITAL
READOUT
annunciators
are
not activated_
3j.
I/I:J.
TIME
- Measures the
time
duration of
the
Delta
Bar
and inverts it
to
show
the
approximate
frequency of the Delta
Baron
the DIGITAL READOUT
(2).
When the Delta
Bar
is
set
to intensify one cycle ofa signal.
the
frequency reading will be
approximately
equal
to
the
frequency of
the
signal.
3k.
AlB
or
B/A - Compares
the
frequencies of channel A
and channel B
and
displays
the
ratio
on
the
DIGITAL READ-
OUT (2).
CluJnnel
A
Input
Controls
-I. INVERT
BAL-
Compensation control allo
.....
scalibration
of
the
inverting
amplifier
to
assure
that
DC
reference levels
are
the
same
for
an
inverted
or
non-inverted display.
5.
TR,\CE
BAL
- Compensation control allows calibration or
input circuits
to
assure
that
DC
reference
le\'els
are
the
same
from one
setting
of
the
VOLTS/DIVISION switch (7)
to
another.
6.
VERTICAL POSITIO:'oi/INVERT -
Determines
vertical
position of Channel
A trace. Pull knob to invert polarity of
Channel A trace.
'.
VOLTS/DIVISION -
Allo'o\'S
direct CRT reading of peak-to-
peak
signalle\'els
when Channel A
vernier
is
rotated
fully c1ock-
.....
ise.
Calibration is for 10:llow-capacity probe. Divide
readings
by
10
if
direct
probe is used.
Provides
correct
range
for channel
Adigital
peak-to-peak readings.
8. VERTICAL
VERNIER
- Allows
gain
of Channel A \'ertical
amplifier to be
varied
for special tests. Must be turned
full~'
clockwise for
calibrated
CRT
measurements.
Does not affect
digital tests.
9.
INPUT COUPLING SWITCH - Selects
DC
or
AC
input
coupling
or
ground reference.
10.
CHANNEL
.0\
INPUT
jack
- Supplies signals for all
channel A
tests, e:ccept
DCV.
11.
CIHNNEL
A
DC
VOLTS
input
jack
routes
DC
signals
around
INPliT
COUPLING SWITCH (9) to allow
DC
measure-
ments
when CRT is
AC
coupled.
Channel
B
Input
Controls
12. VERTICAL POSITION - Determines vertical position of
Channel B trace. Channel
Bdoes
not have an invertfunction.
13.
VOL
TS/DIVISION - Allows direct CRT reading of peak-
to-peak signal levels when Chan B vernier
(14)
is
rotated
fully
clockwise. Calibration is for
10:1
low-capacity probe. Divide
readings by
10
if
direct
probe is used. Pro\'ides
correct
range
for
channel B digital
peak-to-peak readings.
H.
VERTICAL VERNIER - Allows gain of Channel B vertical
amplifier
to be
varied
for special tests. Must
be
turned fully
clockwise for
calibrated
CRT
measurements.
Does not affect
digifal tests.
IS.
INPUT COUPLING SWITCH - Selects
DC
or
AC
input
coupling or ground reference.
16.
CUANr\EL B IXPUT
jack
supplies signals for all channel
B tests. except
DCV.
11.
TRACE
BAL
- Compensation control allows calibrationof
input circuits to
assure
that
DC
reference
levels
are
the
same
from one
setting
of
the
VOL
TSID1VISIO~
(13)
to another.
18.
CHANXEL B
DC
VOLTS
input
jack
routes
DC
signals
around
!l\'PUT COUPLING SWITCH
(15)
to allow
DC
measure-
ments
when CRT is
AC
coupled.
19,
20.
~BEGIN
and
lJ.
E:'\D - Positions
the
intensified Delta
Measurement
Bar
anywhere
on the waveform. The micro-
computer
automatically
e:cchanges the function of
the
two
controls if
the
end
of
the
Delta
Bar
is positioned before the begin-
ning to allow
measurements
with
the
bar
in
either
direction. The
intensified
area
is the only
part
of the waveform
measured
when
any
of
the
four Delta functions
are
selectedwith buttons3g·j.
Horl:ontal
and
Trll/I/erlng
Controls
21.
TRIGGER MODE: Selects
three
different triggering
options:
NORM
- Only shows a
trace
when
the
triggering
circuits
are
fully locked to the incoming signal selected by
the
TRIGGER
SOURCE switch
(22).
AUTO
- Sho
....
'S
a
trace
whether the triggering
circuits
are
locked
or
not.
TV
- Switches in special
sync-separators
to
trigger
on
the
sync pulsesofa composite \'ideo signal. Automatically switch-
ed
between
vertical
sync
for
sweep
speeds
in
the
msec
range
of the TIMEBASE-FREQ switch (2'7)
or
horizontal sync when
in the usec range. NOTE: MODE
s'o\itch does not need to
be
in
the
TV
position if the VIDEO
PRESET
buttons (29
or
30)
are
used.
22.
TRIGGER SOURCE - Selects signal to
be
used to
trigger
sweepcircuits.
CH
A- Selectssignal from Channel A vertical amplifier.
CH
B- Selectssignal from Channel Bvertical amplifier.
.00C
LINE- Locks triggering
circuit
to
60
Hertz
AC
line.
EXT
-Selects
signal applied to EXT
TRIGGER
jack
(25).
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