FELCOM 82
H3-34
Synthesizer
- Rx SYN (OK/NG)
The local oscillator for the receiver consists of VCOs of 730 MHz and 815 MHz
bands and PLL ICs. When either PLL unlocks, the SYS CPU generates NG
signal.
- Tx SYN (OK/NG)
TX local oscillator, consisting of PLL and VCO oscillates between 1682.4 MHz
to 1702.56 MHz. When the PLL unlocks, the SYS CPU generates NG signal.
Antenna controls
- Antenna Status (REMOTE/FAULT)
When the SYS CPU communicates with the PCU in the antenna unit normally,
REMOTE is indicated. If not, FAULT comes on. At power-up, FAULT appears
until the antenna initialization is complete.
RF CON
U23
PLL IC
U15
PLL IC
815M
band
VCO-1
730M
band
VCO-2
FL5
FL7
Ref. 21.12MHz
Ref. 21.12MHz
1535.7
-1555.7MHz
Rx IF
10.7MHz
Rx RF
1525-1545MHz
CR8
CR9
Rx UNLOCK
U4,11
CONT
DATA
DATA
CONT
RF CON
U30
PLL IC
VCO
Ref. 21.12MHz
1682.4
-1702.56MHz
Tx RF
1626.5-1646.5MHz
CR7
U44
Tx UNLOCK
Tx IF
56MHz+120kHz
U35
CONT
DATA
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