Specifications

I-6 MDS 4790/9790 Series Installation and Operation Guide MDS 05-3438A01, Rev. E
Repeater operation 3
illustrated 4
set/display (Repeater Mode screen) 67
Replacing
assemblies 82
transceiver board 82
Requirements for installation 6
RF propagation planning 95
RSSI
display (LCD screen) 73
maximizing 24
theoretical signal strength, formula 98
RSSI, RSSI! commands (display received signal strength
indication) 48
RTU (Remote Terminal Unit)
command (enable/disable internal RTU) 48
internal simulator 79
RX ALR LED 27
RX command (set/display receive frequency) 49
RX Timeout screen 67
RX timeout, set/display (RX Timeout screen) 67
RXLEVEL command (set/display audio receive level) 49
RXPAD command (enable/disable receive attenuator) 50
RXTOT command 50
S
S/N Ratio screen 74
SCD command (set/display soft carrier de-key delay) 50
Screens
Access Level screen 64
Active Radio Status 73
Alarm Masks 71
Backlight Intensity 72
Baud Rate/Format 66
Clear Logs 75
Clear-to-Send Delay 66
configuration 64–73
configuration, listed 60
Continuous Keying 68
Data Buffering 70
diagnostic, listed 60
Display Contrast 71
displaying individual 59
Emphasis 66
Event Log 75
Key On Data 69
main 64
Manual Key 68
Menu Directory screen 64
menu directory, illustrated 59
menu flowchart 57
Modem 65
Output Power 65
Push-to-Talk Delay 66
Radio Selection 74
Receive Frequency 65
Receive Level 71
Receive Pad 71
Receive Signal Strength 73
Repeater Mode 67
RX Timeout 67
S/N Ratio 74
selecting a main menu item 59
selection arrow 58
Serial Number 74
Set Date 73
Set Owner Message 72
Set Owner Name 72
Set Time 73
Show temperature and Voltages 74
Soft Carrier De-Key Delay 67
Software Revision 74
toggle between display-only and configuration modes 59
Transmit Frequency 64
Transmit Gain 71
Transmit Level 70
Transmit Timeout 67
Transmitter Status 74
Unit Address 69
using to set radio functions 60
Selection arrow 58, 59
SER command (display radio serial number) 50
Serial Number screen 74
Set
active transceiver board (RADIO command) 47
active transceiver board (Radio Selection screen 74
audio receive level (Receive Level screen) 71
audio receive level (RXLEVEL command) 49
baud rate/format (Modem screen) 66
clear-to-send delay (Clear-to-Send Delay screen) 66
clear-to-send timer (CTS command) 40
communications attributes for data interface port (BAUD
command) 38
continuous key time-out (TOT command) 54
customer-programmable settings back to factory defaults
(INIT command) 43
date (Set Date screen) 73
intensity of LCD characters (Display Contrast screen) 71
internal modem speed (Modem screen) 65
keying mode (Continuous Keying screen) 68
keying mode (Key On Data screen) 69
key-on-data mode (DATAKEY command) 40
LCD background brightness (Background Intensity
screen) 72
LCD display to radio configuration mode (Access Level
screen) 64
major alarms (AMASK command) 37
minor alarm event classification (NMASK command) 45
output power (Output Power screen) 65
owner message (OWM command) 46
owner message (Set Owner Message screen) 72
owner name (OWN command) 46
owner name (Set Owner Name screen) 72
Pin 25 alarm output (ASENSE command) 38
push-to-talk delay (PTT command) 47
push-to-talk delay (Push-to-Talk Delay screen) 66
radio address (Unit Address screen) 69
radio as root or node (DTYPE command) 42
radio functions using front panel LCD 60
radio’s address (UNIT command) 55
receive frequency (Receive Frequency screen) 65
receive frequency (RX command) 49
receive time-out timer value (RXTOT command) 50
received data handling mode (BUFF command) 39
repeater mode (Repeater Mode screen) 67
RF forward output power (PWR command) 47
RX timeout (RX Timeout screen) 67
signal type and modulation mode (MODEM command) 45
soft carrier de-key delay (SCD command) 50
soft carrier de-key delay (Soft Carrier De-Key Delay
screen) 67