Performance
Check-2445A/2455A
Service
CALIBRATOR, EXTERNAL Z-AXIS AND GATE OUTPUTS
Equipment Required (see Table 4-1)
Calibration Generator (Item 3)
Time-Mark Generator (Item
6)
Oscilloscope with 1
OX
Probe (Item 7)
INITIAL CONTROL SETTINGS
Control settings not listed do not affect the procedure.
a.
Set:
VER"rlCAL
CH
1
and
CH
2
On
CH
3,
CH
4,
ADD,
and
INVERT Off
CHOP/ALT
CHOP
20 MHz BW LIMIT Off
CH
1 VOL TS/DIV 10
mV
CH
2 VOL TS/DIV
500mV
CH
1 and
CH
2 VAR
In
detent
CH
1 Input Coupling
1
MO
DC
CH
2 Input Coupling
50
fl
DC
HORIZONTAL
A SEC/DIV
1 ms (knob
in)
SEC/DIV VAR
In
detent
X10
MAG
Off
Delta
~v
and
~t
Off (press
and
release
until associated readout
is
Off)
TRIGGER
HOLDOFF
BENDS
A (fully
CW)
LEVEL Midrange
SLOPE
+ (plus)
MODE
AUTO LVL
SOURCE
CH
1
COUPLING
DC
50 fl
BNC
T-Connector (Item
8)
50 fl
BNC
Cables
(2
required) (Item
10)
1. Check CALIBRATOR Repetition Rate.
NOTE
Refer to the Adjustment Procedure to check the
accuracy
of
the CAL/BRA
TOR
output levels.
a.
Connect a 10X probe from the CALIBRATOR termi-
nal
to
the
CH
1
OR
X input connector.
b.
Connect 1-ms time markers from the Time-Mark
Generator
to
the
CH
2 input connector
via
a 50-fl
BNC
cable.
c.
Adjust the
CH
2 VOL TS/DIV for several divisions of
marker display.
d. CHECK-Horizontal drift for any time marker is 1
division or less per second (10 seconds or more for 1
marker to drift 10 horizontal divisions).
e.
Set the
CH
2 VERTICAL MODE off.
f.
CHECK-1
cycle is displayed per 2 horizontal divi-
sions for each A SEC/DIV setting from 100 ms
to
100 ns.
g.
Disconnect the test setup.
2. Check External Z-Axis Operation.
a.
Set:
INTENSITY
A SEC/DIV
CH
1 VOL TS/DIV
Fully clockwise
1ms
500mV
4-35
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