Spectra MX920 Bedienungsanleitung

__________________________________________________________________________________________

VOLUME

Rotate the volume control clockwise to adjust the volume control

for a comfortable listening level. If no sound is heard, temporarily

un-mute the radio by briefly rotating the Squelch Control full anti-

clockwise. You can adjust the volume by listening to the receiver's

background noise.

When finished, return squelch setting. (See section on setting

Squelch.)

CHANNEL SELECTING

Push to select the memory channel number for the selected

readout.

The channel display will Rotate and select the higher channel

when the up button is pressed.

By pressing the down button the Channel display will rotate to

display the lower channel selected. The selected channel is

displayed.

SQUELCH

The squelch is used to eliminate any annoying background noise

when there are no signals present.

When no signal is received, rotate the Squelch control (SQL) fully

counterclockwise first, and then rotate SQL clockwise to the point

that the noise just disappears. This will provide optimum Squelch

performance.

When the Squelch is Open, the receiver's background noise can

be heard and 'Green RX LED' is lit on the front panel display.

When the Squelch is closed, the receiver remains quiet when there

are no signals present but any incoming signals will override the

Squelch and be heard in the speaker

NOTE: If an incoming signal is very weak and is close to the

minimum squelch level, it may become broken or “chopped” by the

squelch action. To prevent this, simply open the squelch to allow

the signal to be heard clearly. Alternatively, you can reduce the

squelch sensitivity as described above.

When CTCSS is enabled the channel remains quiet until someone

transmits using the same tone, and the 'Yellow Tone LED'

lamp will be lit. When the transmission ends, the channel

becomes quiet again. By using different tones, several groups of

people can share the same channel without disturbing each other.

ACCESSORY SWITCH

The Accessory button is a programmable momentary switch.

Which is assigned a function in software programming. (Subject to

Radios firmware)

See Dealer for application notes for further information on this

feature.

REPEATER SWITCH

This switch enables the MX920 to work as a repeater.

In repeater mode, the received signal is processed and retransmits

at a different frequency.

Repeaters are usually located on hills, mountains or tall buildings.

The increased elevation greatly improves the range of the repeater

beyond that of a normal base or

Mobile. This means that the repeaters are able to receive and

retransmit signals to radios that would otherwise be out of range of

each other.

Receiving A Call

With the MX920 powered ‘ON’ the front panel blue led is lit.

Set the audio and squelch levels as per SQUELCH

and VOLUME section.

Select the desired receiving channel as per Channel

selecting section.

When receiving a signal the ‘Green RX LED‘indicator

lights green when the squelch is open, and audio is

emitted from the speaker.

Listen for your call sign when you hear activity, and

reply promptly by identifying yourself if called. (For

example: Base receiving).

Transmitting To Making A Call

With the MX920 powered ‘ON’ the front panel blue led is lit.

Select the desired channel, as previously described.

If the ‘Green RX LED' indicator is on, the channel is

busy and you must wait until it is free, before

proceeding. If you attempt to transmit anyway, the

other party may not receive your transmitted signal.

Lift the microphone off-hook and listen to check that

no one else is using the channel. You may also have

to press the Monitor Key on the desktop Microphone

or the Accessory button on the radio briefly, depending

on the microphone used and the options programmed

to your radio.

When using the Hand-Held microphone, Hold it about

5cm from your mouth and press the Press-To-Talk

(PTT) key, located on the side of the microphone (see

Figure 3-1). Speak clearly into the microphone at your

normal voice level, identifying yourself by your call

sign, and the person you wish to contact. (For

example: Base to Mobile 2.).

The ‘Red RX LED’indicator lights while transmitting.

Release the PTT key when you have finished talking.

Transmit Timer

Your MX920 is fitted with a preprogrammed timer to limit the

maximum length of transmissions.

When the time limit is reached, the radio sounds a warning tone,

and transmission is terminated. (Subject to Radio Firmware)

0 0

CHANNEL

DOWN

CHANNEL DOWN

CHANNEL

TEN UNITS UNITS

0 0

PTT

Figure 3-2

Hand-Held

microphone

Figure 3-1

Desktop

Microphon

OPERATION

__________________________________________________________________________________________

Unpacking

The MX920 Radio is securely packed for transport with special end

packers within a pasteboard container. Before unpacking the MX920

radio, please inspect the packaging for signs of damage and report any

damage to your MX800 distributor.

Upon unpacking of the MX920 radio, please ensure that all items

shipped were received, report any missing items to your MX920

distributor. All ports on the rear of the radio should be carefully examined

to ensure that packaging has not become wedged inside them. It is very

important to examine the fan, as operation of the radio will be affected if

any packaging or shipping damage causes the fan to stop working.

Installing the Base Station System

The design of the MX920 allows it to be used in a stand-alone

configuration. Ensure that it is in a secure, dry location with sufficient air

space around it to allow for adequate ventilation. It is recommended that

the chassis be earthed.

An optional 19inch rack mount tray is available for mounting the repeater

into a 19-inch rack. If you intend to install the radio in an equipment rack

consult the supplier’s instructions for your system.

Power Supply

The MX920 has been design to fit an optional internal power supply

(PSU). It can also be fitted with optional sealed lead acid batteries Kit for

a backup battery. Automatic Backup Battery Change Over System and

charger ONLY available in the 240V PSU Model. The built-in backup

system supports automatic switching to an external power DC battery

supply if the AC power supply fails.

Make sure the [POWER] switch on the back of the PSU is turned OFF

when connecting an AC power cable and also when connecting the DC

power cable for a backup battery (Refer to the Mains ratings label on the

rear of the PSU module)

Note.

The MX920 will draw approximately 7 to 9Amps (band dependent) on

transmit and when external power supply \ batteries are used, the gauge

of the DC cable fitted to the 12V supply connector should be adequate to

ensure less than 0.5V volt drop at this current.

If external batteries are used and are non-sealed Lead-acid batteries

type, placement should be at least 4 m away from the repeater.

No reverse polarity protection.

Be sure both the positive (red) and negative (black) terminals are

correctly connected and an inline 15Amp fuse is should be fitted on the

Positive wire. See example in picture below (Not include)

Antenna

In radio communications, the antenna is critical importance, effecting the

output power and sensitivity.

The antenna and coax cable should be the 50ohm type, and have a

Voltage Standing Wave Ratio (VSWR) of 1.5:1 or better.

CAUTION: Protect repeater from lightning by using a lightning arrestor.

NOTE: There are many publications covering antennas and their

installation. Consult with your local dealer for more information and

recommendations.

SWR

Each antenna is tuned for a specified frequency range and SWR

may be increased if used out-of-range.

When the SWR is higher than approx. 3.0:1, the transceiver’s

power drops to protect the Power Amplifiers final transistor. Low

SWR allows full power for transmitting. The MX920 has a

software diagnostic SWR meter to monitor the Antenna SWR

continuously.

Duplexer

The Mx920 with optional internal duplexer kit provides mounting

for a number of different manufactures duplexers.

A duplexer is required when only one antenna is used for both

transmitting and receiving. Select a duplexer according to the

transmitting and receiving frequencies.

See Dealer for further information on this feature

Software Programming

The MX920 can operate in a number of different modes. The

primary alternatives are full duplex, which is the default mode,

repeater and simplex. Using the built-in radio configuration menu

system, the operating mode is programmed for each channel.

There are a number of features that also can be enable/disabled

to suit the individual system needs. This is done thought the

built-in radio configuration menu system, with a Personal

Computer (PC) with terminal software and a RS232

programming cable.

Note: All MX920s’ are set up with a standard configuration.

Diagnostic

The MX920 has built in software to allow the user to monitor the

current state of the radio.

See Dealer for application notes for further information on this

feature.

You will require a Personal Computer (PC) with terminal

software to monitor this and RS232 cable.

Further information can be found at;

www.spectraeng.com.au/mx920-docs.shtml

INSTALLATION

Inline Fuse

Holder

Fuse Link

15Amp Fuse

Inhaltsverzeichnis

Andere Spectra Repeater Handbücher

Spectra

Spectra MX921 Bedienungsanleitung

Beliebte Repeater Handbücher anderer Marken

Gigaset

Gigaset 108 Bedienungsanleitung

Kenwood

Kenwood TKR-750-850 Stücklistenhandbuch

Asus

Asus RP-AC51 Bedienungsanleitung

Exibel

Exibel HRP0101 Bedienungsanleitung

Kidde

Kidde Vega Bedienungsanleitung

Telcosat

Telcosat RBB 850 Installationsanleitung

York

York Universal LINC485 Bedienungsanleitung

MIKOM

MIKOM MRx01B Power Series Bedienungsanleitung

Simrad

Simrad RD 301 Bedienungsanleitung

Tait

Tait TB7304 Bedienungsanleitung

R-tron

R-tron RSN-CDMA-37-C Bedienungsanleitung

Inventronics

Inventronics DALI REPEATER SO Bedienungsanleitung

XFP

XFP 16 Bedienungsanleitung

Andrew

Andrew MRx18 Bedienungsanleitung

COMBA

COMBA RXA3748 Bedienungsanleitung

ADRF

ADRF SDR-ICS-43 Bedienungsanleitung

Teltonika

Teltonika WRP100 Bedienungsanleitung

U-Prox

U-Prox HW Bedienungsanleitung