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Shure U4D Dual Diversity UHF Receiver
7
25D1062 (AG)
Circuit Description
Display Board Interconnect with Rf-Audio Board
Integrated ribbon cable connector P102 interfaces with the rf-audio
board and the networking Interface board through the display board. Pin
assignments for the P102 connector are presented in the table below.
Table 1
P102 Interconnect Pin Assignments
PIN NO.
SIGNAL NAME
DESCRIPTION
1
D+5V
+5V power supply to the Digital Board
2
DLOW_BATT
Analog voltage representing TX battery level
3
DSQUELCH
Data signal to U215 squelch D/A
4
GND
Input power ground to the Digital Board
5
DLE
Data Load Enable to U309 PLL Synthesizer
6
DRSSI_CH_A
Chan. A rf Received Signal Strength Indicator
7
DD
Data signal to U309 PLL Synthesizer
8
DLEDA
Diversity LED A drive signal input
9
DCK
Clock signal to U309 PLL Synthesizer
10
DLEDRET
Diversity LED A and B common return
11
DRSSI_CH_B
Chan. B rf Received Signal Strength Indicator
12
DLEdB
Diversity LED B drive signal input
13
DAUDMTR
Audio metering analog signal input
14
N141
Audio potentiometer return to the Audio Board
15
DSCL
Clock signal to U215 squelch D/A
16
N142
Audio potentiometer wiper to the Audio Board
17
DLONE_W_OUT
Interrupt output to the Networking Interface
18
N143
Audio potentiometer input from the Audio Board
19
DSDO
Networking Serial Data Output
20
DLONE_W_INT
Interrupt input from the Networking Interface
Summary of Contents for U4D
Page 11: ...Shure U4D Dual Diversity UHF Receiver 10 25D1062 AG Preliminary Tests Audio Rf Board Side 2...
Page 46: ...Shure U4 UHF Diversity Receiver 25D1062 TL 45 U4 Rf Audio Printed Circuit Board Legend Side 1...
Page 47: ...Shure U4 Diversity UHF Receiver 46 25D1062 TL U4 Rf Audio Printed Circuit Board Legend Side 2...