IFR COM-120B Service Manual

1
-8-
1 1
SP
ECTR UM
ANALYZE R
PREREQU ISITES:
EQUIPMENT REQUIRED:
FIGU RES:
87412J1
STEP
CALIBRATION
1-8-1 POWER
SUPPLY CALIBRATION
1
-8-2
TCXO/OCXO
CALIBRATION
1
1
1
1-6
1-7
COM.120B MAINTENANCE KIT
DTGTTAL
MULTTMETER
(DMM)
SIGNAL GENERATOR
87A12R1 13
Figure 1-6
Analyzer Tray
Calibration
Points
PROCED
URE
87A12TP202
1.
2.
3.
4.
5.
Apply Power
to COM-1208.
Allow
5
minute warm-up
period.
Press ANLYZ Instruments Key
(a)
to
access
Spectrum
Analyzer
Operation Screen.
Set
Spectrum
Analyzer Fields
as
follows:
Scan
Width
Logarithmic
Function
Tracking
Generator
Mode
Attenuation
RF
Input
Scale
Center
Frequency
Verify
top of screen
is
-30
dBm. lf not, move
Press
DATA SCROLL Keys
(17)
until
-30
dBm
Disconnect W24 f rom
87A12J1
(Figure
1-6).
1 kHz
dBm
OFF
LIVE
0dB
ANT
10
dB
100.0000 MHz
cursor
to
Reference. Press
ENTER
Key.
is
top of screen.
Press ENTER Key.
1-29
1-8-11 SPECTRUM ANALYZER CALIBRATION
STEP
PREREQUISITES:
EQUIPMENT REQUIRED:
FIGURES:
1-8-1 POWER SUPPLY CALIBRATION
1-8-2 TCXO/OCXO CALIBRATION
1
1
1-6
1-7
COM-120B MAINTENANCE KIT
DIGITAL MULTIMETER (DMM)
SIGNAL GENERATOR
OJ_O _0 _!~-====--_O _0 O_O----,~~
87A12J1
87A12R113
87A12TP202
Figu re 1-6 Analyzer Tray Calibration Points
PROCEDURE
1. Apply Power to COM-120B. Allow 5 minute warm-up period.
8707012
2. Press ANLYZ Instruments Key (4) to access Spectrum Analyzer Operation Screen.
3. Set Spectrum Analyzer Fields as follows:
Scan Width
Logarithmic Function
Tracking Generator
Mode
Attenuation
RF Input
Scale
Center Frequency
1 kHz
dBm
OFF
LIVE
o dB
ANT
10 dB
100.0000 MHz
4. Verify top of screen is -30 dBm. If not, move cursor to Reference. Press ENTER Key.
Press DATA SCROLL Keys (17) until -30 dBm is top of screen. Press ENTER Key.
5. Disconnect W24 from 87 A 12J1 (Figure 1-6).
1-29
Scans by ArtekMedia © 2008

IFR COM-120B Specifications

General

Brand	IFR
Model	COM-120B
Category	Measuring Instruments
Language	English