Hud4022A/Hud4025B (Vhf) Main Board; Figure 7-1. Hud4022A/Hud4025 Main Board Overall Block Diagram And Interconnections - Motorola ASTRO Digital XTL 5000 Detailed Service Manual

Schematics, Component Location Diagrams, and Parts Lists: HUD4022A/HUD4025B (VHF) Main Board
7.2

HUD4022A/HUD4025B (VHF) Main Board

MOSIA_ABACUS
SCKA_ABACUS
B(,1),A(,1)
AUX_5V NC
ABACUS3_CS
ABACUS_SSI_FSYNC
ABACUS_SSI_CLK
ABACUS_SSI_RXD
5V_ABACUS
B(,1),A(,1)
RX_FILT_1 NC
B(,1),A(,1)
RX_ATTEN_3 NC
RX_ATTEN_2
B(,1),A(,1)
RX_ATTEN_1
9.3V_ABACUS
9.3V_FGU
MOSIA_FGU
SCKA_FGU
B(,1),A(,1)
SYN_SEL
B(,1),A(,1)
LOCK_DET
16.8_MHZ
B(,1),A(,1)
MODIN
A+_1
A+_2
K9.1V
B(,1),A(,1)
VFORWARD
B(,1),A(,0)
0
VREVERSE
0 B(,1),A(,0)
VTEMP
B(,1),A(,1)
VCURRENT
0 B(,1),A(,0)
RFPA_CNTRL
0 B(,1),A(,0)
VGBIAS_1
B(,1),A(,0)
0
VGBIAS_2
B(,1),A(,1)
VGBIAS_3
A+_3
A+_4
6881096C74-B
RX_BE
5V_TO_IF
IF
5V_FROM_CONTR
FGU
DOUTA_3 DOUTA_2
DOUTA_1
B(,1),A(,0)
0
CLKOUT_3 CLKOUT_2 CLKOUT_1
B(,1),A(,0)
0
FS_3 FS_2 FS_1
B(,1),A(,0)
0
PE_3 PE_2 PE_1
B(,1),A(,0)
0
PC_3 PC_2 PC_1
B(,1),A(,1)
PD_3 PD_2 PD_1
5V_Reg 5V_TO_FGU
0
B(,1),A(,0)
SPI_CLK 16_8MHz FREF
SPI_DATA
16_8_CONT
MOD_IN
SYN_SEL
Lock_Det RX_Inj
9.3V_1 9.3V_2
TX_INJ
K9.1
RX_IF
9.3V_TO_CONTR 9.3V_FROM_FE
5V_TO_FE
5V_IF
0 B(,1),A(,0)
IF_OUT IF_IN
0 B(,1),A(,0)
0 B(,1),A(,0)
RF_ATTN_2_B
RF_ATTN_2_C
0 B(,1),A(,0)
RF_ATTN_3_B
RF_ATTN_3_C
RFPA
TX_INJ
K9.1V_FGU
K9.1V
VREVERSE_ON
VGBIAS1
B(,1),A(,1)
RFPA_OUT
VGBIAS2
K9.1V_ON
VGBIAS3
VFORWARD_ON
RFPA_CNTRL
VFORWARD
VREVERSE
VCURRENT
VTEMP
A+_1
A+_2
A+_3
A+_4

Figure 7-1. HUD4022A/HUD4025 Main Board Overall Block Diagram and Interconnections

7-3
RX_FE
9.3V_TO_IF
5V_FE
IF_OUT_IF
RF_IN
LO_IN
9.3V_FROM_FGU
RF_ATTN_1_A
RF_ATTN_2_A
ON
VREVERSE_ON
RFPA_OUT
K9.1V_ON
0 B(,1),A(,0)
RX_IN
VFORWARD_ON
73D02970C73-O
SHEET 1 OF 23
May 25, 2005