MDS 4710B - Tot [1-255 On;Off]; TX [XXX.XXXXX]; Txlevel [-20; 6 Troubleshooting

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 31
Invisible place holder
Figure 12. Celsius to Fahrenheit Conversion
TOT [1-255 ON/OFF]
This command sets or displays the transmitter Time-out Timer value
(1–255 seconds), as well as the timer status (
ON or OFF). If the timer is
on, and the radio remains keyed for a longer duration than the
TOT value,
the transmitter is automatically unkeyed. This function prevents radios
that are erroneously keyed from tying up the system frequency.
When this happens, the radio must be commanded back to an unkeyed
state before a new keying command will be accepted. The default timer
value is 30 seconds.
TX [xxx.xxxxx]
This command selects or displays the radio’s transmit frequency in
MHz. The frequency step size is normally 6.25 kHz. However, other fre-
quency step sizes are available on request. Refer to Figure 4 on page 4
for the allowable frequency range.
The factory default for transmit frequency is set to the center of the oper-
ating band of the radio.
TXLEVEL [–20...+3, AUTO]
This command sets the analog input gain to modulate the transmitter at
optimum peak deviation. The values are in dBm. If
AUTO is selected, the
input signal level is sensed and amplified as required to provide the
radio’s operating deviation. This function is used when the radio is set
in analog operating mode with the
MODEM NONE command.
This setting is accurate to ±1 dBm.
The factory default is
TXLEVEL AUTO.
6.0 TROUBLESHOOTING
Successful troubleshooting of the radio system is not difficult, but it
requires a logical approach. It is best to begin troubleshooting at the
master station, as the rest of the system depends on the master for
polling commands. If the master station has problems, the operation of
the entire network can be compromised.
-30˚
90˚
-20˚ -10˚
0˚ 10˚
-22˚
20˚ 30˚
40˚
50˚
60˚
70˚
80˚
-4˚
14˚
32˚ 50˚
68˚ 86˚ 104˚
122˚
140˚ 158˚
176˚
194˚
CELSIUS
FAHRENHEIT