TB 9-6625-2044-35
SECTION III
PRELIMINARY OPERATIONS
supply
check
prior
to
making
6.
Preliminary Instructions
adjustments After adjustments are made,
a. The instructions outlined in this section are
preparatory to the calibration process. Personnel should
perform power supply check if all other
become familiar with the applicable sections before
parameters are within tolerance.
beginning the calibration.
NOTE
b. Items of equipment used in this procedure are
Unless otherwise specified, all controls
referenced within the text by common name and item
and control settings refer to the TI
identification number as listed in tables 2 and 3. For the
7.
Equipment Setup
identification of equipment referenced by item numbers
a. Connect TI to 115-V ac source and allow 72
hours for warmup and stabilization.
WARNING
NOTE
HIGH VOLTAGE is used or exposed
If TI has been deenergized for more than
72 hours, allow 7-day warmup period
DEATH ON CONTACT may result if
before beginning calibration
personnel
fail
to
observe
safety
precautions
b. Remove protective covers from TI.
NOTE
source and adjust for 115-V output.
8 through 11 are not within tolerance,
perform the power
hour for restabilization.
SECTION IV
CALIBRATION PROCESS
NOTE
NOTE
Unless otherwise specified, verify the
Interconnect TI and spectrum analyzer
result of each test and, whenever the test
IA7) rear connectors, using cable (B4),
requirement is not met, take corrective
and leave connected for remainder of
action before continuing with the
calibration.
calibration.
Adjustments required to
(2) Position TI controls as listed in (a) through
calibrate the TI are included m this
(f) below:
procedure
Additional
maintenance
information
is
contained
m
the
(a)
MODE switch to MARKER.
manufacturer's manual for this TI
(b)
RESOLUTION switch to 1 kHz.
(c)
TENS switch to + 10.
8.
Time Base
(d)
UNITS switch to 0 (zero).
a. Performance Check
(e)
TENTHS switch to 0 (zero).
(f)
FUNCTION switch
to
TRACK
ANALYZER.
FINE controls on A4 assembly (fig.
minimum frequency difference on frequency difference
NOTE
meter (A4).
FUNCTION switch not included on some
models
stabilization. Frequency drift as indicated on frequency
(3) Position controls of spectrum analyzer as
-9
difference meter will be less than 3 parts in 10 .
listed in (a) through (h) below:
b. Adjustments. No further adjustments can be
(a) FREQUENCY control to 30 MHz.
made.
9.
Amplitude Range
(c) SCAN WIDTH switch to ZERO.
a. Performance Check
(1) Set controls of variable attenuator (A10) to
(zero).
20 dB and connect equipment as shown in figure 3.
(e) SCAN TIME PER DIVISION switch
to 1 MILLISECOND.
(f) LOG REF LEVEL switch to -40
dBm.
4