MDS 4710B - Page 53

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide I-5
interface connection for (Pin 21) 12
signal level versus DC voltage 14
RTS (Request-to-Send Input), interface connection for (Pin 4) 11
RTU
command
28
RTU, resetting remotely 14
RUS (Receiver Unsquelched Sensor), interface connection for (Pin
10)
11
RX command 28
RXD
LED
13
LED interface connection for (Pin 3) 11
RXLEVEL command 28
S
Safety. See Cautions
SCD command
29
SER command 29
Serial number, display radio (SER command) 29
SHOW command 29
Signal strength. See RSSI
Simplex
communications in point-to-point systems
2
single-frequency operation 3
special case of switched carrier operation 3
Sleep Mode 7
example implementation 7
Software
determining level (SREV command) 29
installing upgrades 37
Specifications 34–35
data interface 35
operating environment 35
primary power 35
receiver 35
transmitter 34
UK MPT 1411 1
Squelch tail eliminator
disable (DSTE command)
24
display state (STE command) 30
enable (ESTE command) 24
SREV command 29
STAT command 29
Status, radio (STAT command) 29
STE command 30
Summaries/charts
Celsius to Fahrenheit conversion
31
command equivalents for older transceivers 22
data interface pin functions 11
dBm-watts-volts conversion chart 39
event codes 33
feedline loss by cable length and type 9
HHT operational settings 17
LED status indicators 13
local maintenance commands 21
modem type versus speed 10
operating parameter commands 19
relationship between RSSI and DC voltage 14
specifications 34–35
transceiver accessories 4
SWE command 30
T
Technical reference 34–39
data interface specifications 35
helical filter adjustment 35
operating environment specifications 35
primary power specifications 35
receiver specifications 35
transceiver specifications 34
transmitter specifications 34
TEMP command 30
Temperature, display transceiver internal (TEMP command) 30
Testing. See Bench testing
TEXT TOO LONG error message
18
Time-out period, display (TOT command) 31
Timer setting, clear-to-send (CTS command) 23
Timer status, display (TOT command) 31
TOT command 31
Transceiver
commands
18
mounting 8
power input 8
programming 15
specifications 34
Transmit Audio Input, interface connection for (Pin 9) 11
Transmitter
activate (KEY command)
26
power. See PWR command 27
set audio level (TXLEVEL command) 31
specifications 34
Troubleshooting 31–34
bench testing set-up 38
checking for alarms using STAT command 32
event codes 32, 33
LED status indicators 32
major vs. minor alarms 33
TX command 31
TXD
LED
13
LED, interface connection for (Pin 2) 11
TXLEVEL command 31
U
UNKNOWN COMMAND error message 18
V
Voltages, display DC input/output (SHOW command) 29