Section 1 - Calibration Section; Calibration - IFR COM 120B Maintenance Manual

SECTION 1
.
CALIBRATION
1
.1
G
EN
ERAL
This section contains calibration procedures for the following assemblies and systems:
PARA TITLE
PAGE
1-8-1
1-8-2
1-8-3
1-B-4
1-8-5
1-8-6
1-8-7
1-8-8
1-8-9
1-8-10
1-8-1
1
1-8-12
1-8-13
1-8-14
1-8-15
1-8-16
These
POWER SUPPLY CALIBRATlON
TCXO/OCXO CALIBRATION
DVM CALIBRATION
GENERATOR OUTPUT LEVEL CALIBRATION
DISTORTION METER CALlBRATION
SINAD METER CALIBRATION
RF GENERATE FM DEVIATION CALIBRAT]ON
RF GENERATE PM DEVIATION CALIBRAT]ON
RF GENERATE AM MODULATION CALIBRATION
RF GENERATE EXTERNAL MODULATION CALIBRATION
SPECTRUM ANALYZER CALIBRATION
MIXER NULL CALIBRATION
FM DEVIATION METER CALIBRATION
PM DEVIATION METER CALIBRATION
AM MODULATION METER CALIBRATION
POWER METER CALIBRATION
1-5
1-7
1-9
1-1
1
1-14
1-16
1-18
1-21
1-23
1-25
1-29
1-36
1-38
1-41
1-43
1-45
procedures should be performed as a result of one or more of the following conditions:
O
lf,
during the course of normal operation, the COM-1208 or any major function thereof
fails to
meet
the performance specifications.
O
lf
a module is found to be defective and requires
replacement.
O
lf the
recommended 12 month calibration interval is
due.
Figure 1-1 lists the calibration procedures required based on the replacement of a specific
module. All procedures must be performed
for the annual calibration.
1-1-1
SAFETY PRECAUTIONS
As with any piece of electronic equipment, extreme caution should be taken when working with
'live" circuits.
When performing
the calibration procedures in this section,
be sure
to
observe
the
f
ollowing precautions:
WARNING:
REMOVE
ALL JEWELRY
BEFORE PERFORMING ANY CALIBRATION
PROCEDURES INVOLVING LIVE CIRCUITS.
HEED
ALL
WARNINGS AND CAUTIONS CONCERNING MAXIMUM VOLTAGES
AND
POWER INPUTS.
1-1
SECTION 1 - CALIBRATION
1-1 GENERAL
This section contains calibration procedures for the following assemblies and systems:
PARA
1-8-1
1-8-2
1-8-3
1-8-4
1-8-5
1-8-6
1-8-7
1-8-8
1-8-9
1-8-10
1 -8-11
1-8-12
1-8-13
1-8-14
1-8-15
1-8-16
TITLE
POWER SUPPLY CALIBRATION
TCXOIOCXO CALIBRATION
DVM CALIBRATION
GENERATOR OUTPUT LEVEL CALIBRATION
DISTORTION METER CALIBRATION
SINAD METER CALIBRATION
RF GENERATE FM DEVIATION CALIBRATION
RF GENERATE PM DEVIATION CALIBRATION
RF GENERATE AM MODULATION CALIBRATION
RF GENERATE EXTERNAL MODULATION CALIBRATION
SPECTRUM ANALYZER CALIBRATION
MIXER NULL CALIBRATION
FM DEVIATION METER CALIBRATION
PM DEVIATION METER CALIBRATION
AM MODULATION METER CALIBRATION
POWER METER CALIBRATION
PAGE
1-5
1-7
1-9
1 -11
1-14
1-16
1-18
1-21
1-23
1-25
1-29
1-36
1-38
1-41
1-43
1-45
These procedures should be performed as a result of one or more of the following conditions:
•
If, during the course of normal operation, the COM-120B or any major function thereof
fails to meet the performance specifications.
• If a module is found to be defective and requires replacement.
• If the recommended 12 month calibration interval is due.
Figure 1-1 lists the calibration procedures required based on the replacement of a specific
module. All procedures must be performed for the annual calibration.
1 -1 -1 SAFETY PRECAUTIONS
As with any piece of electronic equipment, extreme caution should be taken when working with
"live" circuits. When performing the calibration procedures in this section, be sure to observe
the following precautions:
WARNING: REMOVE ALL JEWELRY BEFORE PERFORMING ANY CALIBRATION
PROCEDURES INVOLVING LIVE CIRCUITS.
HEED ALL WARNINGS AND CAUTIONS CONCERNING MAXIMUM VOLTAGES
AND POWER INPUTS.
1 -1