Specifications

MDS 05-3438A01, Rev. E MDS 4790/9790 Series I/O Guide 71

Receive Level [–20

to +3]

This screen is used to set or display the radio’s audio receive level when the radio

is operating as an analog device. The audio receive level can be set from –20 to +3

dBm.

To change the audio receive level, press ENTER. You do not need to use the

left/right arrow buttons to select a digit. Instead:

To increase the receive level, press the up or left arrow button ( ).

To decrease the receive level, press the down or right arrow button ( ).

Press ENTER again to make the change.

(Operable only on the “A”/analog model radios.)

Transmit Gain This screen is used to enable or disable the transmit audio boost for the transmit

audio level. (Operable only on the “A”/analog model radios.)

Receive Pad This screen is used to enable or disable the receive attenuator for the receive audio

level.

Alarm Masks This screen is used to display hexadecimal codes which specify whether each

alarm event will cause:

• an alarm output relay to be asserted

•a radio switch-over.

The screen also displays the alarm sense setting. For an explanation, or to change

the alarm masks, see the following PC commands:

Display Contrast This screen is used to set the intensity of the front panel display’s foreground

characters. Making the characters darker may aid the clarity of the front panel

display when viewed from an angle.

The bar display indicates the relative intensity of the foreground characters, with ‘0’

being faint characters and ‘100’ being dark characters.

To change the selection, press ENTER, then use the left/right arrow buttons to

move the bar display to the desired setting. The screen changes dynamically to

show the effects of the change. Press ENTER again to set the change.

TXLEVEL [–20 to +3, AUTO]

command, Page 55

RXLEVEL [–20 to +3] command

Page 49

TXGAIN [ON/OFF] command,

Page 55

RXPAD [ON/OFF] command,

Page 50

AMASK [0000 0000–FFFF

FFFF] command, Page 37

ASENSE [HI/LO] command,

Page 37