Microwave Data Systems MDS 4310 - Table 4-1. Main Circuit Board Potentiometer Settings for Remote Maintenance; Table 4-2. Test Procedure Reference Chart

4-6 FIELD TESTS & ADJUSTMENTS MDS 05-2415A01, Rev. A
Table 4-1. Main Circuit Board Potentiometer Settings for Remote Maintenance
DESIGNATOR FUNCTION POSITION
R69 TX Power Output Maximum CW
R168 TX Deviation Maximum CW
R69 and R168 are multiturn controls that should be advanced at least 10 turns, or until a
faintly audible clicking sound is heard from the potentiometer. This sound indicates the end
of the control’s range.
After these potentiometers are preset to the positions listed in Table 4-1, the technician
should adjust the transmitter’s output power (using the HHT) according to the instructions
given in the BASIC TRANSCEIVER TESTS section. (Page 4-7.)
Then, the technician should proceed with the required alignment procedures in the order
given below. A separate section is provided for each modem configuration installed in the
transceiver—no modem, 1200 bps, 4800 bps, and 9600 bps. These sections cover transceiver
adjustments for Transmit Frequency, Squelch, Deviation, and Receive Audio Output.
NOTE
To store Remote Maintenance adjustments, you must
type
RMST. If the settings are not stored, the radio will
revert to the previous settings when the power is
removed from the transceiver.
INTRODUCTION TO FIELD TESTS & ADJUSTMENTS (See Figure 4-9)
The following test procedures in this chapter are arranged according to the hardware
configuration of the MDS 4310 transceiver. The primary difference between units is the
presence of a modem—no modem, 1200 bps modem, 4800 bps modem, or 9600 bps modem.
There is also a “Basic Tests” section that applies to all radio configurations, and a separate
section for adjustment and checkout of the Remote Maintenance Module (if one is installed).
Refer to Table 4-2 to locate the required tests and proceed directly to those sections that
apply to your radio. All of these procedures assume the radio is powered up and connected to
a dummy load or antenna as required.
Table 4-2. Test Procedure Reference Chart
For alignment instructions relating to... Procedure
Basic Transceiver Checks —Applies to all radio configurations
➊
Radios with no internal modem installed
➋
Radios with a 1200 baud modem installed
➌
Radios with a 4800 baud modem installed
➍
Radios with a 9600 baud modem installed
➎
Remote Maintenance Module (with or without a modem installed)
➏