IFR COM-120B Service Manual

STEP PROCEDURE
87A't3A'tA3R7
87413A1A3R5
8707011
Figure 1-8
Mixer Null
Calibration
Points
Adjust
87A1341A3R5
and 87A13A1A3R7
(Figure
1-8) until Zero Frequency
Response is
>1.5 Major
Divisions
down
f rom
top of screen.
Set
COM-120B
Main Power
Switch
(25)
to OFF.
Disconnect
coaxial cables and
Receiver Ribbon
Cable
f rom Receiver Tray.
Remove
Receiver
Extender
Card and Receiver Ribbon
Cable
f rom
COM-120B .
15. lnstall
Receiver Tray
into
COM-1208. Connect
coaxial cables.
16.
Go to
Step
1.
12.
13.
14.
1-37
STEP
PROCEDURE
87A13A1A3R7
87A13A1A3R5
8707011
Figure 1-8 Mixer Null Calibration Points
12. Adjust 87A13A1A3R5 and 87A13A1A3R7 (Figure 1-8) until Zero Frequency Response is
~1.5 Major Divisions down from top of screen.
13. Set COM-120B Main Power Switch (25) to OFF.
14. Disconnect coaxial cables and Receiver Ribbon Cable from Receiver Tray. Remove
Receiver Extender Card and Receiver Ribbon Cable from COM-120B.
15. Install Receiver Tray into COM-120B. Connect coaxial cables.
16. Go to Step 1.
1-37
Scans by ArtekMedia © 2008

IFR COM-120B Specifications

General

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