Motorola Commercial Series Informations sur les services - Page 20

Parcourez en ligne ou téléchargez le pdf Informations sur les services pour {nom_de_la_catégorie} Motorola Commercial Series. Motorola Commercial Series 30 pages. Uhf2 (438-470mhz)
Également pour Motorola Commercial Series : Manuel d'utilisation de base (16 pages), Informations sur les services (48 pages), Informations sur les services (46 pages), Manuel de l'utilisateur (18 pages), Manuel d'utilisation de base (12 pages)

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Motorola Commercial Series Informations sur les services
2-6
IC Designator
U451
ASFIC_CMP
Pin
Pin Function
1
VDD for analog circuits
2
DISC audio input
3
Ground for analog circuits
4
DACU output
5
DACR output
6
DACG output
7
VOX peak detector output
8
PLCAP for DC integrator
9
SQIN
10
Universal audio input/output
11
VDD for DACs
12
SQCAP
13
GCB2 general purpose output
14
GCB1 general purpose output
15
GCB0 general purpose output
16
Squelch channel activity output
17
Squelch detect digital output
18
PL/low speed data I/O
19
High speed data I/O
20
Chip select
21
Serial clock input
22
Serial data input
23
Ground for clock synthesizer
24
Loop filter cap for clock syn
25
PLCAP2 for LS integrator
26
Not used
27
Vdd for clock synthesizer
28
Clock synthesizer output
29
1200 Hz ref for MDC decode
30
GNDDO
31
Ground for digital circuits
32
Vdd for analog switches
33
Vdd for digital circuits
34
16.8 MHz master clock input
35
GCB3 general purpose output
36
TX audio return from option
37
GCB4 general purpose output
TROUBLESHOOTING TABLES
DC Voltage
Comments (Condition)
3.00
1.34
From U510
GND
0
0
2.38 (typ)
Power set (TX mode)
2.91
0.40
0.01
0
4.95
0
0
Audio PA_EN (unsquelched)
0
3.00
BW select (25 kHz mode)
0
To U401-84
0
To U401-83
1.50
3.00
3.23
From U401-2
0
3.23
GND
0.74
1.17
0
3.00
1.70
3.00
GND
GND
4.96
3.00
1.54
3.00
Internal MIC enable
0
0