Specifications

MDS 05-3438A01, Rev. E MDS 4790/9790 Series Installation and Operation Guide I-7
start of new message timer (DMGAP command) 42
time (Set Time screen) 73
time (TIME command) 54
transmit audio level (TXLEVEL command) 55
transmit frequency (Transmit Frequency screen) 64
transmit frequency (TX command) 54
transmit level (Transmit Level screen) 70
transmit timeout (Transmit Timeout screen) 67
transmitter state (Manual Key screen) 68
Set Date screen 73
Set Owner Message screen 72
Set Owner Name screen 72
Set Time screen 73
SHOW command (display various settings) 51
Show Temperature and Voltages screen 74
Simplex operation 4
SNR (Signal-to-Noise Ratio)
display (S/N Ratio screen) 74
displaying (SNR command) 51
SNR, SNR! commands (display signal-to-noise ratio) 51
Soft Carrier De-Key Delay screen 67
Soft carrier de-key delay, set/display (Soft Carrier De-Key
Delay screen) 67
Software
display release information (SREV command) 52
Software Revision screen 74
Specifications 93
data characteristics 93
receiver 94
transmitter 94
SREV command (display software release information) 52
Start-up 24
Start-up screen, illustrated 27
STAT command (display alarm status). See also ALARM
command 52
STDBY LED 27
T
Tables
alarm event codes 53
alarm relay connections 23
conventions used in PC command summary 31
data interface pinouts 22
dBm vs. watts 65
dBm-watts-volts conversion 100
diagnostics, LCD screen commands 63
diagnostics, PC 33
diagnostics, PC commands 33
explanation of front panel LEDs 27, 76
feedline loss chart 10
hexadecimal values for major alarm conditions 36
operating parameters, LCD screen commands 61
owner and radio information commands, PC 34
owner and radio information, LCD screen commands 63
PC commands--diagnostics 33
PC commands--owner and radio information 34
PC commands--radio operation 32
radio operation, PC commands 32
Technical reference 93–100
specifications 93
TEMP command (display internal temperature) 53
Temperature, display internal (TEMP command) 53
Testing. See Bench testing
TIME command (set/display time) 54
Timers
clear-to-send (CTS command) 40
clear-to-send delay (LCD screen) 66
continuous key time-out (TOT command) 54
push-to-talk (PTT command) 47
push-to-talk delay (LCD screen) 66
RX timeout (LCD screen) 67
soft carrier de-key delay (LCD screen) 67
soft carrier de-key delay (SCD command) 50
start of new message (DMGAP command) 42
transmit timeout (LCD screen) 67
transmit timeout duration (LCD screen) 67
TOT command (set/display time-out timer) 54
Transceiver board
assembly 82
display active (RADIO command) 47
removal, illustrated 83
removing or replacing 2, 82
Transmit
audio boost, enable/disable (Transmit Gain screen) 71
level, set/display (Transmit Level screen) 70
timeout value, display (Transmit Timeout screen) 67
timeout value, set (Transmit Timeout Duration screen) 67
Transmit Frequency screen 64
Transmit Gain screen 71
Transmit Level screen 70
Transmit Timeout Duration screen 67
Transmit Timeout screen 67
Transmitter
de-key (DKEY command). See also KEY command 41
specifications 94
state, set/display (Manual Key screen) 68
Transmitter Status screen 74
Troubleshooting. See Problem solving or Diagnostics
TX ALR LED 27
TX command (set/display transmit frequency 54
TXGAIN command (enable/disable transmit audio boost) 55
TXLEVEL command (set/display transmit audio level) 55
U
Unit Address screen 69
UNIT command (set/display radio’s address) 55
Up/down arrow buttons 58
use in radio configuration 60
V
Volts, conversion to dBm or watts, table 100
W
Watts
conversion to dBm or volts, table 100
vs. dBm, table 65
Windows PC. See PC 28
Wiring interface, connections 17