Tektronix 2445A - Adjustment Procedure; Introduction

Section 5-2445A/2455A Service
ADJUSTMENT PROCEDURE
INTRODUCTION
IMPORTANT-PLEASE READ BEFORE USING THIS PROCEDURE
The • Adjustment Procedure· is used to restore optimum performance or return the instrument to conformance with its
"Performance Requirements"
as listed in the "Specification" (Section 1). As a general rule, these adjustments should be
performed every 2000 hours of operation or once a year if used infrequently.
PARTIAL PROCEDURES
This procedure is divided into subsections to permit
calibration of individual sections of the instrument when-
ever complete instrument calibration
is not required. To
perform a partial procedure, first set the instrument
as
directed in the Initial Setup Conditions at the beginning of
the section, then make any changes called for within the
procedure. Perform
all steps within a subsection, both in
the sequence presented and in their entirety, to ensure
that control settings will be correct for the following steps.
The adjustments
in CAL 01, 02, 03, and 04 should be
performed in numerical sequence, i.e., CAL 01 should be
done before CAL 02, CAL 02 should be done before CAL
03, etc. Performing partial procedures when setting the
automatic calibration constants
(i.e., only one or two of the
CAL steps) is not recommended
and should only be done
if the calibration constants set in the preceding steps are
known to
be correct.
BEFORE YOU BEGIN:
NOTE
When performing any of the automatic calibration
routines
(CAL 01 through CAL 07), the CAUNO CAL
jumper
P501 must be moved to its CAL position
(between pins 1 and 2)
before fuming the power on.
When the desired calibration has been performed,
retum the jumper to its NO CAL position.
a. Turn instrument Power on.
NOTE
The instrument MUST have a 20-minute warmup
period before making any adjustments. Performing
the adjustment
procedure while the temperature is
drifting may cause em,neous calibration settings.
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