Specifications

I-2 MDS 4790/9790 Series Installation and Operation Guide MDS 05-3438A01, Rev. E
OPT! (list installed radio options) 46
OWM command (set/display text message) 46
OWN command (set/display text message) 46
owner and radio information, PC 34
PC, summarized 30–35
PTT (set/display push-to-talk delay) 47
PWR (set/display RF forward output power) 47
RADIO (set/display active transceiver board) 47
radio operation, PC 32
REPEATER (enable/disable repeater configuration) 48
RSSI, RSSI! (display received signal strength
indication) 48
RTU (enable/disable internal RTU) 48
RX (set/display receive frequency) 49
RXLEVEL (set/display audio receive level) 49
RXPAD (enable/disable receive attenuator) 50
RXTOT (set/display receive time-out timer value) 50
SCD (set/display soft carrier de-key delay) 50
SER (display radio serial number) 50
SHOW (display various settings) 51
SNR, SNR! (display signal-to-noise ratio) 51
SREV (display software release information) 52
STAT (display alarm status). See also ALARM
command 52
TEMP (display internal temperature) 53
TIME (set/display time) 54
TOT (set/display time-out timer) 54
TX (set/display transmit frequency) 54
TXGAIN (enable/disable transmit audio boost) 55
TXLEVEL (set/display transmit audio level) 55
UNIT (set/display radio’s address) 55
Connector
analog orderwire, illustrated 18
Continuous Keying screen 68
Controls
front panel 58
front panel, illustrated 26, 58
using to configure radio 59
Cooling fan
location, illustrated 91
cooling fan maintenance 91
CTS command (set/display clear-to-send timer) 40
D
Data
characteristics 93
connector pinouts, table 22
connector, illustrated 22
connector, installing 21
enable/disable buffering (LCD screen) 70
Data Buffering screen 70
Data interface port
set display communication attributes for (BAUD
command) 38
set/display received data handling mode (BUFF
command) 39
DATAKEY command (set/display key-on-data mode) 40
DATE command (set/display date) 41
dBm
conversion to watts or volts, table 100
vs. watts, table 65
Diagnostic port
cable connecting PC to radio 29
connecting 21
J1 pin connections, illustrated 21
Diagnostics 28–75
connecting a PC to the radio for 28
network-wide setup, illustrated 81
using InSite software for network-wide 80
using LCD screens 78
Display
active connector port (SHOW command) 51
active transceiver board (RADIO command) 47
active transceiver board (Radio Selection screen) 74
active transceiver board’s serial number (Serial Number
screen) 74
actual RF power output (SHOW command) 51
alarm conditions (Active Radio Status screen) 73
alarm status in hexadecimal format (ALARM
command) 35
audio receive level (Receive Level screen) 71
audio receive level (RXLEVEL command) 49
baud rate/format (Baud Rate/Format screen) 66
clear-to-send delay (Clear-to-Send Delay screen) 66
clear-to-send delay (CTS command) 40
communications attributes for data interface port (BAUD
command) 38
continuous key time-out (TOT command) 54
data handling mode (BUFF command) 39
date (DATE command) 41
date (Set Date screen) 73
DC input/output voltages (SHOW command) 51
event history (Event Log screen) 75
hardware revision level (HREV command) 43
hexadecimal alarm codes (Alarm Masks screen) 71
hexadecimal major alarm codes (AMASK command) 37
hexadecimal minor alarm codes (NMASK command) 45
history of system events (LOG command) 44
intensity of LCD characters (Display Contrast screen) 71
internal modem speed (Modem screen) 65
internal temperature (TEMP command) 53
internal temperature and voltages (LCD screen) 74
keying mode (continuous, DCE) (Continuous Keying
screen) 68
keying mode (key-on-data, key-on-RTS) (Key On Data
screen) 69
key-on-data mode (DATAKEY command) 40
LCD background brightness (Backlight Intensity
screen) 72
list of installed radio options (OPT! command) 46
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 address (UNIT command) 55
radio configuration (master/remote) (MODE command) 45
radio configuration (root/node) (DTYPE command) 42
radio model number (MODEL command) 45
radio serial number (SER command) 50
receive frequency (Receive Frequency screen) 65
receive frequency (RX command) 49
receive time-out timer value (RXTOT command) 50
received signal strength (Receive Signal Strength
screen) 73
received signal strength (RSSI, RSSI! commands) 48
repeater mode (Repeater Mode screen) 67