Alignment; Table J-1. P/N 03-2301A01 Configuration Switch Settings - Microwave Data Systems MDS 4310 Installation, Operation & Field Maintenance

ALIGNMENT

There are no adjustments required on the Audio Processing Module. However, when the
module is installed in a radio that was previously aligned for use with a modem, two adjust-
ments need to be made on the transceiver motherboard —Receive Audio and Transmit
Deviation. Refer to Chapter 4—Field Tests and Adjustments, Test Procedure , for adjust-
ment procedures.
CONFIGURATION
Tables J-1 and J-2 list various functions of the DIP switch on the PC board. The
configuration chosen for some functions, such as the filtered/flat response depends on the
specific requirements of your system. If technical assistance is required, contact MDS,
Systems Engineering Department.
When the VOX Function is used in an MDS 4310 Transceiver,
the Squelch Tail Eliminator (STE) circuitry on the transceiver's
motherboard should be turned off. The status of this operating
parameter can be checked, and if necessary set to OFF, using
the Hand-Held Terminal (HHT). For more information on
using the HHT, see Chapter 3—Programming and Diagnostics,
especially the section "Programming Examples" and Table 3-2.
Table J-1 lists the configuration switch settings for the MDS P/N 03–2301A01. Figure J-2
shows the component layout for the PC board.
C31
U3
C15 R22
R38
Figure J-2. 03-2301A01 Audio Processing Module
Table J-1. P/N 03–2301A01 Configuration Switch Settings
FUNCTION
Filtered/Flat TX Audio
RX Audio Enable
Limiter ON/OFF
De-Emphasis ON/OFF
Pre-emphasis ON/OFF
VOX Enable
Filtered/Flat RX Audio
TX Audio Enable
J-2
NOTE
MICROWAVE DATA SYSTEMS
C22
C27 C23
R11
R4
C7
R26
R25
U2
R13
R16
R24
R17
C28
C17
C29
R18
R19
C6 C1
U7
R41 R3
P8
C24 C20
R6 C2
VOX 4000 PCB
SW1
1
2
3
4
5
6
7
8
APPENDIX J
TXFILT
1 R48
ON
R5
R15
2 RXAUD
LIMIT
3
R21
4 DEEMPH
PREEMP
5
6 VOX C3
U6
RXFILT
7
R14
8 ENABLE
R2
R10
R9
R7
R33
R44
C4
U8
C14
R1 C9
C5
R43
R45
C11
C25
C18
R8
R36
SWITCH POSITION
OFF ON
No VOX Keyline VOX Keyline
Filtered Flat
No TX Limiter TX Limiter
No De-Emphasis De-Emphasis
No Pre-Emphasis Pre-Emphasis
VOX Disabled VOX Enabled
Filtered Flat
No Processing Processing
R23 C21
R20 R30
R28
R29
R27
U4
C10 C19
R31
U1
C13
C8
R46
P6
R47
MDS 05-2415A01, Rev. A