Performance Check-2445A/2455A Service
TRIGGERING
Equipment Required (see Table 4-1)
Primary Leveled Sine-Wave Generator (Item
2)
Secondary Leveled Sine-Wave Generator (Item 4)
Function Generator (Item
5)
1
OX
Probe (supplied with 2445A or 2455A) (Item
7)
T Connector
(2
required) (Item 8)
Precision
50
n BNC Cable (Item 9)
INITIAL CONTROL SETTINGS
Control settings not listed do not affect the prooedure.
a. Set:
NOTE
Select channels to
set
VOL
TS/DIV.
VOLTS/DIV
CH
1
CH
2
CH
1 and
CH
2 VAR
CH
3 and
CH
4
VERTICAL MODE
CH
1
CH
2,
CH
3,
CH
4,
ADD and INVERT
CHOP/ALT
20 MHz BW LIMIT
Input Coupling
CH
1 and
CH
2
HORIZONTAL
A SEC/DIV
SEC/DIV VAR
X10 MAG
TRACE SEP
4-16
100mV
500mV
In
detent
0.5 V
On
Off
ALT
Off
1
Mn
DC
2
µ.s
(knob in)
In detent
Off
Fully CW
50
n BNC Cable
(4
required) (Item 10)
Dual-Input Coupler (Item 11)
50
n BNC Termination
(2
required) (Item 12)
Adapter (Item 25)
Adapter (Item 26)
(2
Required)
Delta
At and AV
TRACKING
Trigger
HOLDOFF
LEVEL
SLOPE
MODE
SOURCE
COUPLING
Off (press and release
until associated readout
is off)
Off
B ENDS A (fully CW)
Midrange
+ (plus)
AUTO LVL
VERT
DC
1. Check A and B Triggers.
NOTE
The
Trigger Level Readout Accuracies are checked
in the Vertical Performance Checks.
a.
Refer
to
Table 4-5
to
determine what the A Trigger
requirements are and at what frequencies various checks
are made.
b.
Using a 50-fl BNC cable, connect one
of
the follow-
ing test generators to the CH 1 input connector. Select the
generator that produces the proper frequency range for
the conditions being tested as called
out
in
Tables 4-5 and
4-6. When using the leveled sine-wave generators (items 2
and 3 below), the output must
be
terminated into 500
(either the
50-n input coupling
or
a 50-n termination may
be
used).
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