LBI-39129B
TABLE OF CONTENTS
Page
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Cover
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
CIRCUIT ANALYSIS
PRESELECTOR FILTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
PREAMPLIFIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
IMAGE REJECTION FILTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
INJECTION AMPLIFIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
INJECTION FILTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
DOUBLE BALANCE MIXER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
FAULT DETECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
MAINTENANCE
TEST PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
ALIGNMENT PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
TROUBLESHOOTING PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
TABLE 2 - RETUNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
PRODUCTION CHANGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
OUTLINE DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
ASSEMBLY DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
MAINTENANCE MANUAL FOR
RECEIVER FRONT END MODULE
19D902782G6, G8, G9, G10, G11, G12
DESCRIPTION
The Receiver Front End (RXFE) Module amplifies
and converts the RF signal to the first IF at 21.4 MHz.
This is a down conversion process using low side (G9,
G10) or high side (G6, G8, G11, G12) injection. The
RXFE module is powered by a regulated 12 volts. The
RXFE printed wiring board contains the following func-
tional circuits:
•
Preselector Filter
•
Preamplifier
•
Image Rejection Filter
•
Injection Amplifier
•
Injection Filter
•
Double Balanced Mixer
•
Fault Detector
All but the Fault Detector circuit in the RXFE
module have 50 ohm impedance terminations.
ERICSSONZ
Ericsson Inc.
Private Radio Systems
Mountain View Road
Lynchburg, Virginia 24502
1-800-528-7711 (Outside USA, 804-528-7711)
Printed in U.S.A.
Summary of Contents for 19D902783G1
Page 6: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE 19D902494G1 19D902504 Sh 1 Rev 6 LBI 38643C 5...
Page 7: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE 19D902494G1 19D902504 Sh 2 Rev 6 LBI 38643C 6...
Page 42: ...RECEIVER FRONT END BOARD 19D902490G4 G7 OUTLINE DIAGRAM 19D902490 Sh 4 Rev 6A LBI 38673F 5...
Page 43: ...ASSEMBLY DIAGRAM RECEIVER FRONT END MODULE 19D902782G3 19D902782 Sh 1 Rev 6 LBI 38673F 6...
Page 44: ...ASSEMBLY DIAGRAM RECEIVER FRONT END MODULE 19D902782G4 G7 19D902782 Sh 2 Rev 6 LBI 38673F 7...
Page 45: ...SCHEMATIC DIAGRAM RECEIVER FRONT END MODULE 19D902782G4 G7 19D904768 Sh 1 Rev 6 LBI 38673F 8...
Page 47: ...SCHEMATIC DIAGRAM RECEIVER FRONT END MODULE 19D902782G3 19D903498 Rev 7 LBI 38673F 10...
Page 48: ...This page intentionally left blank LBI 38673F 11...
Page 56: ...ASSEMBLY DIAGRAMS LOW PASS FILTER MODULE 19D902856G3 19D902856 Sh 1 Rev 0 LBI 38674F 7...
Page 71: ...ACCESSORIES ANTENNA SWITCH 19B235897P2 LBI 38675E 9...
Page 80: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE 19D902494G7 G11 193D1065 Sh 1 Rev 3 LBI 39123E 7...
Page 81: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE 19D902494G7 G11 193D1065 Sh 2 Rev 3 LBI 39123E 8...
Page 82: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE 19D902494G7 G11 193D1065 Sh 3 Rev 3 LBI 39123E 9...