Specifications

ManualsBrandsMDS ManualsConsumer electronicsMDS 4710 Series

68 MDS 4790/9790 Series I/O Guide MDS 05-3438A01, Rev. E

RX Mute Mode This screen is used to set or display the radio’s RX (receive) Muting status. RX

muting may be required when the radio is conﬁgured as a full-duplex polling remote

communicating through a repeater. RX muting prevents the radio from hearing its

own transmissions (“echoes”), which can cause errors in some software

applications. The default RX Mute time is 5 milliseconds. This cannot be changed

from the front panel, but may be changed using RXMUTE nn command from a PC

interface (see icon below).

To change the RX Mute status, press ENTER, then use the up/down arrow buttons

to select ENABLE (RX Mute on) or DISABLE (RX Mute off). Press ENTER again

to make the change.

Continuous

Keying

This screen is used to set or display the radio’s keying mode (continuous or

non-continuous keying). Typically, a master station is set for continuous keying. If

continuous keying is disabled, the radio needs to be keyed with Pin 4 (RTS) of the

interface connector.

To change the keying mode, press ENTER, then use the up/down arrow buttons to

select ENABLE (continuous keying) or DISABLE (non-continuous keying). Press

ENTER again to make the change.

Manual Key This screen is used to manually key or dekey the transmitter. The transmitter state

can be displayed by selecting Transmitter Status from the Diagnostics menu

(Page 74).

To key the transmitter, press ENTER, then use the up/down arrow buttons to select

ENABLE (manual keying). Press ENTER again to key the transmitter.

To dekey the transmitter, press ENTER, then use the up/down arrow buttons to

select DISABLE (manual de-keying). Press ENTER again to dekey the transmitter.

Multi-Drop

Address (MADDR)

The radio’s Multi-Drop Address uniquely identiﬁes this radio on an RS-232 COS

(code-operated switch) bus connected to the rear panel’s DIAGNOSTIC PORT, J1.

The unit’s address initially is set as NONE, for a computer directly connected to the

DIAGNOSTIC PORT of one radio. MADDR addresses can range from 1...255. The

master station will ignore diagnostic messages sent to other Multi-Drop Addresses.

With the MADDR address programmed, MDS’ InSite™ network management

system program can poll master stations through the COS bus to receive

diagnostic information of the master unit itself. The MADDR command will work on

MDS x790 master stations with software version 1.7 or later installed. For more

details, please see “Connecting Multiple Masters at One Site” on Page 30.

NOTE: The Multi-Drop Address is not the same as the radio’s Unit Address

described below.

RXMUTE [ON/OFF/Time

in msec] command,

Page 49

CKEY [ON/OFF] command,

Page 40

KEY command, Page 44

DKEY command, Page 41

MADDR [NONE, 1–255]

command, Page 44