Radio control group - RX

RX-Menu path:

Main/Radio control ►

Parameter Range Default Details

S/N SQ level 5 to 20 dB 12 dB Sets the Signal to noise level that the S/N squelch shall open on. The S/N squelch floats on top of the noise and opens (de mutes the loudspeaker) on the pre-set signal to noise level.

Operation mode Main | Norm Norm A main radio will enter into standby if an alarm is detected by the internal BITE system.

A norm radio will continue operation (if possible) even if a failure is detected.

In a main / standby configuration, the main radio is set to Main and the standby radio is set to Norm. When correctly wired the control can then automatically be transferred to the standby radio by using the available alarm output and select input on the radios.

Modulation AM, FM,

AM Select the modulation type / waveform to use.

Alarm On | Off Off This setting force the radio into alarm state (forced alarm) if set to On.

Used for simulations, or to force a radio to signal an alarm in order to select a backup (standby) radio.

Standby On | Off Off This setting force the radio into standby state (forced standby) if set to On.

Used to manually set a radio to standby.

Force mute On | Off Off This setting force the radio to mute the audio out.

Table 8-13, Radio control group, receiver

Jotron AS| TR7750: Operators handbook  6BOperating Instructions Page 7-27 7.3.4.2 RX config group - RX

RX-Menu path:

Main/RX config ►

Parameter Range Default Details

Audio ► Output source Speaker |

The output source determines where the received audio is output.

 Line: Output audio on the 600 ohm line interface

 Speaker: Output audio on the integrated speaker.

 Headphone: Output audio to a headphone connected to the front panel connector. for 90% amplitude modulation (AM).1kHz signal.

RF AGC Off, X-fast, Fast, Normal, Slow, X-slow

Norm Set the attack and release times for the RF AGC. Set to Norm for EN300676

specification.

 Off is used only for maintenance purposes.

AF AGC On | Off Off Set the automatic AF gain control on or off.

Setting AF AGC on will lead to constant audio output when received signals have varying modulation levels. This will enhance the audio quality for weak signals

Mute on transmit Mute | Mute with the dB level set by the Audio mute level setting. Requires that the TX busy signal on the RX connector on the transmitter is routed to the TX busy input on the receiver REM connector via the transceiver cable. Mute on transmit is set to Mute w/AGC.

Audio mute delay 0 to 250ms 100ms Set the time that the muting should persist after the transmission has ended.

Squelch ► Sq setup Level | S/N |

Level OR S/N | Level AND S/N

Level OR S/N

The radio has Level and S/N squelch functions. This setting select the type or combination of squelch function for the radio.

Level selects level squelch only and will de-mute audio when any RF signal passes the level set by the SQ override lvl setting.

S/N selects Signal to noise squelch function only and de-mute the audio when the signal to nose level passes the S/N ratio set by the S/N SQ level setting.

Level OR S/N will give audio if either the Level or the S/N squelch triggers.

Level AND S/N setting needs to fulfil both Level and S/N squelch requirements to de-mute the audio.

Jotron AS| TR7750: Operators handbook  6BOperating Instructions Page 7-28 RX-Menu path:

Main/RX config ►

Parameter Range Default Details

SQ override lvl -5 dBuV to +42 dBuV

20 dBuV The override level where the analogue squelch will open even if it is a “noisy”

signal. This squelch level overrides the noise compensated squelch when both are selected with Level or S/N in the Sq setup setting. Setting this level to a lower level than the “SQ level” will disable the noise compensated squelch completely in this setup.

Inband config (option In-band)

Off, Open, Closed, Both

Off Defines the behavior of the in-band squelch signal.

 Off: No in-band tone is generated

 Open: An in-band tone is generated when the squelch is open (receiving)

 Closed: An in-band tone is generated when the squelch is closed (muted)

 Both: Different tones are generated depending on the status of the squelch.

Inband freq open (option In-band)

100 – 5000 Hz 10 Hz steps

5000 Set the frequency to be used for the in-band tone that will be used to signal that the squelch is open. Requires that open is included in the In-band config setting. The receiver will automatically notch the received signal and insert a tone at the given frequency.

Applicable to the line interface output only.

Inband freq closed (option In-band)

100 – 5000 Hz 1 Hz steps

5000 Set the frequency to be used for the in-band tone that will be used to signal that the squelch is closed. Requires that closed is included in the In-band config setting. The receiver will automatically insert a tone at the given frequency.

Applicable to the line interface output only.

Inband level (option In-band)

-30 to -10 -24 The level of the in-band tone relative to the setting in the line level output level in dB.

Applicable to the line interface output only.

SqOut output Closed | Open |

Set the behavior of the SqOut output (AUX2, p.1 and p.2).

Set the behavior of the RxBusy output (REM, p.5).

Calibrate ► Ref oscillator -127 – 128 0 This setting is used to fine adjust (calibrate) the reference oscillator of the receiver. The full range is approximately 10 ppm. (each step gives approximately 5 Hz of RX center frequency change). This setting should be used with care, and only when a calibrated frequency measuring instrument is connected to the radio.

The exact frequency of the receiver can be determined either by connecting a spectrum analyzer to the antenna connector of the receiver and measure the leakage of the LO output (45 MHz above the operating frequency) – or by using a radio test set to measure the bandwidth of the receiver and adjust until centre is on the operating frequency.

Jotron AS| TR7750: Operators handbook  6BOperating Instructions Page 7-29 RX-Menu path:

Main/RX config ►

Parameter Range Default Details

RSSI reading -10 to +10 dB 0 dB In order to measure the RSSI level exactly, there is a provision to calibrate the reading.

Normally the reading is within +/-2 dB without calibration, but it can be useful if to signals are being compared.

VDL mode 2 ► (option VDL 2)

Output RS232, RS485,

LAN

LAN Determines to which port data received with the VDL2 waveform is output

Station ID 0 - 16777215 0 If the station ID is set different from the default value (0) the radio will filter all incoming messages, and only output those messages that are addressed for the specific ground station ID.

(Broadcast messages are always received and output on the interface)

Provider Code 0 - 16777215 16777215 Used to set a provider code that is used to filter out messages to “all ground stations of a particular provider”. Set to default (0xffffff) to enable “all providers”.

Message format BER message Single AVLC Multiple AVLC

Single AVLC

Defines the format of the VDL2 output message using the TCP/IP connection.

 BER message: The receiver omits FEC and bit destuffing. Messages are output as “raw” data. Used to test conformance to EN301481-1 tests.

 Single AVLC: Messages are output as single AVLC frames

 Multiple AVLC: Messages are output as multiple AVLC frames (up to 7 in each message) CU Interval 0 – 60s

1s steps

0 The interval on which the “CU” value (Channel utilization) is sent to the host over the tcp connection.

The CU is calculated for the time period set, i.e. If set to 15 the CU will reflect the average channel utilization for the past 15s.

Default (0) means that the CU trap is switched off.

Mute on transmit On/Off On Determinates if the receiver is muted (no output) during transmissions from own TX. If set to Off, own generated messages will be detected and output on the TCP/IP

connection. The filters above (Station ID and Provider Code) will not have any effect on own messages.

Factory preset 0, 1 0 Writing a “1” to this parameter will reset the receiver and restore the settings that where set before shipping from the factory. Use with care – all settings that has been changed will be reset!

Table 8-14, RX config group, receiver

Jotron AS| TR7750: Operators handbook  6BOperating Instructions Page 7-30 7.3.4.3 Interface config group - RX

RX-Menu path:

Main/Interface config ►

Parameter Range Default Details

Access control SysOp, Technician, Operator, Restricted

SysOp Set the user access level for local control.

This setting limits the availability of some menus, depending on the access level. In order to set the access level from the user interface, a special hardware key must be inserted into the microphone/headset connector. Details of the key available in the technical manual.

Set language Depending on model

English Set the language to use on the user interface. Availability of different languages depends on specifications when ordering the receiver.

Alarm config ► Alarm pin pullup Disabled | Enabled

Enabled The ALARM_OUT_P, ALARM_OUT_N output pins on AUX1 connector and ALARM on the REM connector is used to signal that the radio has an alarm. This parameter applies a +12V pull-up voltage to ALARM_OUT_P and ALARM output when there are no alarms present on the radio.

When an alarm is detected the relay contact closes and ALARM_OUT_P is connected to ALARM_OUT_N and ALARM is connected to GND.

Select polarity High to select|

Low to select

Low The SELECT_IN_P and SELECT_IN_N input pins on AUX1 can be used to select / deselect (Standby) the radio with an external signal (e.g. alarm from a main radio). This setting determines if the radio should be operational on a low select input signal or a high select input signal.

RS485 ► Bitrate 1200 – 115200 1200 Set the bit rate to use on the RS485 port Address 1 – 255 1 Set the address to use on the RS485. In a

remote system using the RS485 communication port, all units that are interconnected need to have a unique address in order to avoid collisions and misinterpretation of data.

Protocol Legacy | standard

Legacy The protocols are described in the data manual.

Legacy uses a protocol where the 9. bit is used for address recognition, this is the protocol used on the previous radio models (TA7450, RA7202) and is compatible with the RACS II PC software and the RCU remote control unit.

Standard is an eight bit protocol that uses the multidrop capability of the RS485 bus.

For more information on protocols, refer to the SW manual.

RS232 ► Bitrate 1200 – 115200 115200 Set the bit rate to use on the RS232 interface ports

LAN ► Address 4 octets IP

address

--- IP interface address for the unit. Must be unique on the LAN and should correspond to the LAN setup for the network that the radio is connected to.

Netmask 4 octets IP netmask

255.255.0.0 The netmask used on the IP interface.

Should correspond to the local network that the radio is connected to.

Jotron AS| TR7750: Operators handbook  6BOperating Instructions Page 7-31 RX-Menu path:

Main/Interface config ►

Parameter Range Default Details

Default gateway 4 octets IP address

0.0.0.0 If set different from the default, the radio unit will send IP traffic to the default gateway if the address is unreachable on the local network

SNMP port 1 – 65535 161 The input port used for SNMP commands to the radio, sent from external sources like CMS systems.

The default port is the global port for SNMP commands

SNMP trap IP 4 octets IP address

239.0.0.1 The IP address witch SNMP traps are sent to. The address can be in the form of a unicast, multicast or broadcast address.

SNMP trap port 1 – 65535 162 The port (usually on a CMS system) where SNMP traps are sent to, form the radio. The default value is the global port for SNMP traps

SNMP trap interval 0 – 60 5 The interval on which an “alive” trap (operstate) are sent from the radio to the CMS system, if the TrapIP and TrapPort are set. The value is given in seconds. 0=OFF TCP control port 1 – 65535 3008 The port used by TCP clients for the remote

control protocol packets.

DHCPv4 On/Off Off Enable IP4 DHCP reception. Unit need re-boot after changing this parameter VDL input port VDL output source is set to IP

VDL in IP (option VDL 2)

4 octets IP address

0.0.0.0 Set this IP address to limit VDL packages origin to the IP address set.

Set to 0.0.0.0 to allow VDL packages from all origins (default)

VDL out IP (option VDL 2)

4 octets IP address

0.0.0.0 The IP address that VDL packets received will be sent to. Must be set in order to detect VDL packets.

RTP out IP (option VoIP)

4 octets IP address

0.0.0.0 This is the address of the host ( external unit) that shall receive the VoIP packages that is sent by the radio.

RTP out port (option VoIP)

1 – 65535 3004 The port on the receiving host where receiver VoIP packages are sent to.

RTP Framesize (option VoIP)

10 to 100ms 20ms The interval (payload length) between VoIP RTP(voice) packages sent from the radio.

RTP codec (option VoIP)

G711uLaw, G711Alaw, G728, PCM raw

G711Alaw The codec(protocol) used to encode/decode VoIP samples.

RTP sync src (option VoIP)

0 to 65535 0 The synchronization source ID embedded in the RTP(voice) header used for

distinguishing packages to the same port.

VoIP protocol (option VoIP)

ED137, RTP The protocol format used to send/transmit VoIP packages.

IPv6 IPv6Enable On/Off Off Enable IP6 support. Unit need re-boot after

changing this parameter Static IP6 16 octets IP6

address

--- Display unit Static IP6 address if set via SNMP tool (MIB browser).

DHCPv6 On/Off Off Enable IP6 DHCP reception. The parameter is only in effect if IP6 is enabled.

DHCP IP6 16 octets IP6 address

--- Display unit IP6 DHCP address, received from DHCP server, if IP6 and DHCP are enabled.

LinkLocal IP6 16 octets IP6 address

--- Display unit IP6 Link Local address if IP6 is enabled. This IP address is derived from the MAC address

Jotron AS| TR7750: Operators handbook  6BOperating Instructions Page 7-32 RX-Menu path:

Main/Interface config ►

Parameter Range Default Details

Rack ► Number 0 – 100 0 Used to identify the location of the radio

from a remote application. Defines the rack where the radio is located.

Row 0 – 20 0 Used to identify the location of the radio

from a remote application. Defines the row number in the rack. The row number is counted from the top to the bottom of the rack.

Column 0 – 6 0 Used to identify the location of the radio from a remote application. Defines the column in the rack. The column number is counted from the left in steps of one receiver width or 14TE. There are 84 TE in a 19”

rack.

I.e. in a 19” frame width 6 receivers, the receivers will have the column set to 1,2,3,4,5 or 6.

In a 19” frame width 3 transmitters, the transmitters will have the column set to 1,3 or 5.

Table 8-15, Interface config group, receiver 7.3.4.4 Bite system group - RX

RX-Menu path:

Main/Bite system ►

Parameter Range Normal Details

Alarms ► Depends on the alarm status of the radio unit

This menu item displays all active alarms in the unit.

See section 6 for more information Alerts ► Depends on the

alert status of the radio unit

This menu item displays all active alerts in the unit.

See section 6 for more information Measurements ► RSSI -10 to +110

dBuV

Displays the received signal level (RSSI) in dbuV

Line level -50 to +10 dBm Displays the level measured on the output of the 600 ohm line interface

AGC volt 0 to 5 V Displays the internal AGC voltage

Codec/Eth LD Lock / Unlock Lock Displays the status of the VCO used for the Codec and Ethernet chips.

Ch utilization 0..100 % Displays the channel utilization when the receiver is used in VDL mode 2. The value is calculated default for the past second, or averaged over a longer period determined by the value set in VDL2-CU interval

Temperature -30 to +85°C (alarm limit)

-20 to +80°C (alert limit)

Displays the internal temperature measured on the main board [°C]

DC current 0.1 to 0.45 A (alarm limit)

0.1 to 0.4 A (alert limit)

Displays the total current consumption [28V]

of the receiver [A]

IF current 20 to 90 mA (alarm limit)

30 to 80 mA (alert limit)

Displays the current consumption in the IF (Intermediate Frequency) circuit [mA]

LNA current 20 to 90 mA (alarm limit)

30 to 80 mA (alert limit)

Displays the current consumption in the LNA (Low noise amplifier) [mA]

LO level Min. 15 dBm (alarm limit)

Displays the level measured at the output of the local oscillator in dBm

LO lock Lock / Unlock (alarm)

Lock Displays the status of the local oscillator in the receiver.

12 Volt 9.5 to 14.5V (alarm limit)

10 to 14V (alert limit)

Displays the regulated 12V supply from the power supply board

The 12V is used on the main board

Jotron AS| TR7750: Operators handbook  6BOperating Instructions Page 7-33 RX-Menu path:

Main/Bite system ►

Parameter Range Normal Details

6 Volt 5.0 to 7.0V 6.0V Displays the regulated 6V on the demodulator board

5 Volt 4.5 to 5.5V (alarm limit)

4.6 to 5.4V (alert limit)

Displays the regulated 5V supply from the power supply board.

The 5V is used on several modules 3.3 Volt 2.9 to 3.6V

(alarm limit)

3.0 to 3.5V (alert limit)

Displays the regulated 3.3V supply from the power supply board.

The 3.3V is used on several modules

AC Present/Not Present / Not present. Signals that AC is

present or not present at the input of the unit.

Table 8-16, Bite system group, receiver

Jotron AS| TR7750: Operators handbook  6BOperating Instructions Page 7-34 7.3.4.5 System info group - RX

RX-Menu path:

Main/System info ►

Parameter Details

PName Displays the name of the product. ie RA7203

PID Displays the customer/system ID of the product. ie 'RX1 OSL CONTROL'. This is text is configurable via SNMP.

Sno Displays the serial number of the radio.

The serial number is also used to define the MAC address of the unit.

SW MAJ Display the major release number of the units software. The number in front of the dot. ( 3.)

SW MIN Display the minor release number of the units software. The number after of the dot ( .5)

SW REL Display the release date of the software

HW VER Defines the HW release of the various modules identified by the module (X-) or part number

Rack Display the location where the radio is located, ie:'Tower'. This is text is configurable via SNMP.

Uptime Display the time that the radio has been powered on (in seconds/hours)

Table 8-17, System info group, receiver

Jotron AS| TR7750: Operators handbook  7BFailures and corrective actions

Page 8-35

8 Failures and corrective actions

In document Operation and Installation Manual TR7750 VE (Page 116-125)