BK Precision 1405 User Manual

CONTROI,SI
AND INDICATOBS
7.
V
ATT Switeh. Vertieal
attenuator.
Coarse vertieal
amplitude
range
seleetor
switeh.
Attenuates high
amplitude
signals applied
to VERT INPUT terminal
before eonneetion
to vertieal
amplifier,
providing
suitable level for
waveform
display
on
CRT
sereen.
n1n
(10
mV/div)
position
is most
sensitive range;
signal
applied to vertieal
amplifier is unatten-
uated.
In
1/10
position,
input to vertieal
amplifier
is
attenuated to l/10
of
input
signal
level 1/100
position
attenuates
vertieal amplifier input
to 1/100 of input
value.
V GAIN eontrol
provides
fine
adjustment
within eaeh
range.
In GND
position,
VERT
INPUT
jaek
is diseon-
neeted from vertieal
amplifier and input
of amplifier is
grounded.
This
provides
traee at 0
volts referenee
for de
eoupled
input, and is
eorreet
position
for making
de balanee adjustments.
Signal Voltage
To Be ileasrned
(ranges
overlap)
Ventieal
Attenuator
Pcition
Below
0.8 V
p-p
(0.3
V
rms)
0.2
to 8 V
p-p
(0.0?
to 3 Vrms)
Above2Vp-p(0.?Vrms)
1
LlLO
1/100
V GAIN Cmtrol Vertieal
gain
control.
Fine
adjustment
of
waveform amplitude.
This eontrol
must
be
fully eloekwise
for
maximum
sensitivity;
e.g.
10
mV/div in
ftlff
range of
V
ATTenuator.
t
POSITION
Control Vertieal
position
eontrol Moves
entire
waveform
up and
down
on CRT
sereen.
{>
POSffiON
Control Horizontal
position
eontrol Moves
entire waveform
left or
right
on
CRT sereen.
SWEBP RANGE
Control Coarse
sweep
frequeney
seleetor switeh. The
10-100,
100-1k,
1k-10 k,
and 10 k-100 k
positions
represent
the
range
of sweep frequeneies
that
are
possible
with the
fine
sweep
frequeney
eontrol
(SWEEP
VARI/EXT
GAIN
eontrol)
within
eaeh
range. EXT
position
seleets
external
horizontal
defleetion. In this
mode, sweep
gener-
ator
is
disabled
and HOR
INPUT
jaek
is
eonneeted
to
horizontal amplifier. Signal
applied at
HOR INPUT
jaek
produees
horizontal
(X-axis)
defleetion.
SWEEP VARI/EXT GAIN
Control
Fine
sweep
frequeney adjustment
and external
signal
gain
eontrol
When
SWEEP
RANGE
switeh
is
set to EXT,
this eontrol
adjusts
gain
of
horizontal ehanneL Note that
horizontal
frequeney
response varies
with
position
of
this eontrol
(refer
to
speeifieations).
CRT Gratieule-
Gratieule
is
made of
aerylie resin and
has
engraved
markitrgs,
both eoarse and
fine, to aid
in
m easuring
waveform on CRT
sereen.
There is
also
a
dB seale on
the
gratieule,
indexed at 0,
-3, -6,
-10,
and
-20
dB
and
REF. Ampli-
tude from
REF
to 0
dB is 6
divisions.
These
graduations
are eonvenient
for
frequeney response
m
easurem
ents.
L4.
SYNC INT-BXT
Switeh.
In
lNTernal syne
position,
sweep
is synehronized
to output
of vertieal amplifier,
whieh is also the
waveform
being observed on CRT
sereen.
In EXT
position,
sweep
is
synehronized
to
signal
applied
to
EXT SYNC
jaek.
For
synehronized waveform
display, this
signal m
ust
have a time
relationship
to
signal
being
observed.
BOTTOIII
PANEL
CONTROII;
15. DC
BALANCE Control
DC
balanee
adjustm ent
for
vertieal amplifier.
This
adjustment should
be set
for
ze?o
or
minimum vertieal
movement
of
traee as
V GAIN
eontrol
is
rotated
from
full
eloekwise
to full
eountereloekwise
(with
V
ATT set
to
GND).
16. HOR
GAIN
Control
Horizontal
ampli-
fier ealibration adjustment.
L2.
Y
v
13.
v
8.
9.
10.
11.

BK Precision 1405 Specifications

General

Brand	BK Precision
Model	1405
Category	Test Equipment
Language	English