MDS MDS 9710 Series Specifikace stáhnout pdf (Strana 35)

MDS 05-3305A01, Rev. D MDS 4710/9710 I/O Guide 27

RXLEVEL [–20 to +6]

RX Audio Output

Level

The RXLEVEL command selects or displays the receive output level

present on Pin 11 of the

DATA INTERFACE’s DB-25 connector. This func-

tion is used in

MODEM NONE mode with analog audio.

RXTOT [NONE, 1-1440]

Loss of RX Data

Alarm Time

The RXTOT command selects or displays the receive time-out timer value

in minutes. This timer triggers an alarm (event 12) if data is not detected

within the specified time.

Entering the

RXTOT command without a parameter displays the timer

value in minutes. Entering the

RXTOT command with a parameter

ranging from 0 to 255 resets the timer in minutes. Entering the

RXTOT

command with the parameter

NONE disables the timer.

SCD [0-255]

Soft-Carrier Dekey This command displays or changes the soft-carrier dekey delay in milli-

seconds.

This timer specifies how long to wait after the removal of the keying

signal before actually releasing the transmitter. A value of 0 millisec-

onds unkeys the transmitter immediately after the removal of the keying

signal.

SER

Radio’s Serial

Number

This command displays the radio’s serial number as recorded at the fac-

tory.

SHOW [DC, PORT, PWR]

Show Power

Settings

The SHOW command displays different types of information based on

the command variables. The different parameters are:

•

DC—Display DC input/output voltages

• PORT—Display the connector port (RJ-11 or DB-25) that is active

for diagnostics and control.

•

PWR—Display RF power output

SNR

RX Signal-to-Noise

Ratio

This command continuously displays the signal-to-noise (SNR) ratio of

the received signal expressed in dB, until you press the key. As

used in this guide, the SNR measurement is based upon the signal level

following equalization for received frames.

The SNR is an indication of the received signal quality. The SNR indi-

cation ranges from 10 dB to 33 dB. A value of 10 dB represents a very

poor signal. A value of 24 dB represents a very good signal.

ENTER

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