F800 CIRCUIT DESCRIPTION
10 (25)
Uppgjord (även faktaansvarig om annan) -
Prepared (also subject responsible if other)
Nr -
No.
KL/ECS/S/LT Magnus Lindahl ECS/S/LT-96:5044
Dokansv/Godk -
Doc respons/Approved
Kontr -
Checked
Datum -
Date
Rev File
KI/ECS/S/LTC 1996-06-06 A
965044.DOC
Transmitter
The simplex transmitter as well as the duplex transmitter is a number of different RF
circuits and control blocks implemented on the radio board. The following RF circuits
and control blocks are parts of the transmitter:
#" RF switch. TX RF on/off switching.
#" RF driver. Preamplification of the RF signal.
#" RF power amplifier. Final RF amplifier.
#" Directional coupler. Detection of SWR.
#" RF detector. Detects RF power output power.
#" RF power indicator. Indicates that RF output power is present.
#" Power control loop. Monitoring the RF output power.
RF Power Amplifier
Control Logic
TX Switch
Multicoupler
Antenna
Switch
HL
Power Ind
Locking
TX On
Power Red.
TX/RX
RF from VCO
Antenna
To RX
Fig E: Block diagram for F800 transmitter
To Next Page
Loading...
