MDS 05-3438A01, Rev. F
MDS 4790/9790 Series I/O Guide
I-3
screen) 73
key-on-data mode (DATAKEY command) 44
LCD background brightness (Backlight Intensity screen)
76
list of installed radio options (OPT! command) 50
owner message (OWM command) 50
owner message (Set Owner Message screen) 76
owner name (OWN command) 50
owner name (Set Owner Name screen) 76
Pin 25 alarm output (ASENSE command) 41
push-to-talk delay (PTT command) 50
push-to-talk delay (Push-to-Talk Delay screen) 70
radio address (Unit Address screen) 73
radio address (UNIT command) 59
radio configuration (master/remote) (MODE command)
48
radio configuration (root/node) (DTYPE command) 46
radio model number (MODEL command) 48
radio serial number (SER command) 54
receive frequency (Receive Frequency screen) 69
receive frequency (RX command) 52
receive time-out timer value (RXTOT command) 53
received signal strength (Receive Signal Strength screen)
77
received signal strength (RSSI, RSSI! commands) 52
repeater mode (Repeater Mode screen) 71
RF forward output power (PWR command) 51
RX timeout (RX Timeout screen) 71
signal-to-noise ratio (S/N Ratio screen) 78
signal-to-noise ratio (SNR, SNR! commands) 55
soft carrier de-key delay (SCD command) 54
soft carrier de-key delay (Soft Carrier De-Key Delay
screen) 71
software release information (Software Revision screen)
78
software release information (SREV command) 55
start of new message timer (DMGAP command) 45
time (Set Time screen) 77
time (TIME command) 57
transmit audio level (TXLEVEL command) 59
transmit frequency (Transmit Frequency screen) 68
transmit frequency (TX command) 58
transmit level (Transmit Level screen) 74
transmit timeout (Transmit Timeout screen) 71
transmit timeout duration (Transmit Timeout Duration
screen) 71
transmitter state (Manual Key screen) 72
transmitter state (Transmitter Status screen) 78
Display Contrast screen 75
DKEY command (deactivate transmitter). See also KEY com-
mand 45
DLINK command
enable/disable network-wide diagnostics, description 45
use of 84
DMGAP command (set time to wait between characters) 45
DTYPE command
set radio to root or node for diagnostics, description 46
use of 84
E
Emphasis
enable/disable (Emphasis screen) 70
Emphasis screen 70
Enable/disable
audio transmit boost (Transmit Gain screen) 75
continuous keying (CKEY command) 43
data buffering (Data Buffering screen) 74
emphasis and de-emphasis (Emphasis screen) 70
internal RTU (RTU command) 52
network-wide diagnostics (DLINK command) 45
network-wide diagnostics, procedures 84
receive attenuator (Receive Pad screen) 75
receive attenuator (RXPAD command) 53
repeater operation (REPEATER command) 51
transmit audio boost (TXGAIN command) 59
transmit timeout timer (Transmit Timeout screen) 71
ENTER button
use in display-only mode 62
use in radio configuration 63
ESCAPE button
use in display-only mode 62
use in radio configuration 64
Event codes 57
major alarms, defined 83
minor alarms, defined 83
Event log
use in problem solving 82
Event Log screen 79
F
Fade margin 7
discussion 101
Fading, calculating probability of system 102
Feedline
installing 17
loss chart 10
selection 9
Formulas 101–102
free space path loss 102
Fresnel zone boundary 102
probability of system fading 102
theoretical signal strength 102
Frequency
in simplex or switched carrier operation 4
preventing unnecessary use of (Transmit Timeout screen)
71
range 97
receiver range 98
receiver stability 98
set/display receive (Receive Frequency screen) 69
set/display receive (RX command) 52
set/display transmit (Transmit Frequency screen) 68
set/display transmit (TX command) 58
stability 98
step size 97
transmitter range 98
Fresnel zone
boundary, formula 102
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