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T6T VHF 100 W Transmitter

Page 6

Maintenance

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AC and DC Change-over Check

If both ac and dc input supplies are connected to the transmitter, carry out the following check:

(1)

Confirm that both ac and dc supplies are connected to the transmitter. Ensure that the rear panel
Power switch is set to the I (on) position.

(2)

Confirm that the front panel Ready indicator is lit, the LCD is illuminated, and the transmitter is
operational.

(3)

Switch off the ac supply from its source.

(4)

Check that the transmitter continues to operate correctly from the dc supply. If accessed, the
front panel BIT screen will show AC Supply as off, and DC Supply as on. The value of the dc
supply is also shown.

Summary of Contents for T6T

Page 1: ...T6T VHF 100 W Transmitter User Documentation ...

Page 2: ...elephone From UK 01778 345434 From outside UK 44 1778 345434 Fax From UK 01778 342877 From outside UK 44 1778 342877 www parkairsystems com Errata Any errors found in this handbook are promulgated through the Park Air FTP network Any user can access this information by logging on to ftp parkairsystems com When logged on select the public Pub folder then the Handbook Errata Sheets folder and then s...

Page 3: ...ered trademark of International Business Machines Microsoft This is a registered trademark of Microsoft Corporation in the USA and other countries Windows This is a registered trademark of Microsoft Corporation in the USA and other countries Indicates electrical danger to personnel WARNING Indicates a hazardous material WARNING Indicates a non ionizing radiation hazard WARNING Indicates a specifie...

Page 4: ...iate frequency kg kilogramme kHz kilohertz LCD liquid crystal display m metre mA milliamp MARC multi access remote control mm millimetre mW milliwatt MHz megahertz MSK minimum shift keying PA power amplifier PC personal computer PCB printed circuit board pk pk peak to peak ppm parts per million PSU power supply unit PTT press to transmit RF radio frequency ROM read only memory RSE2 remote site equ...

Page 5: ...uipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equ...

Page 6: ...smitter About This Hard Copy This document apart from the preface is a hard copy of the files contained on the CD and comprises the following parts Preface not on CD Introduction Specification Operation Installation Maintenance ...

Page 7: ...Back to Transmitter Main Page Introduction This topic gives a brief introduction to the T6T VHF 100 W Multimode Transmitter ...

Page 8: ...es can be selected AM Voice All transmitters have this mode AM MSK optional Mode 2 optional Mode 3 optional Fig 1 T6T VHF 100 W Transmitter Models and Part Numbers The following table identifies the T6T VHF 100 W transmitters Mechanical Installation The transmitter fits into an industrial standard 19 inch 483 mm equipment cabinet and occupies 4U of space Description Part Number Frequency Range Cha...

Page 9: ...ng the Park Air Virtual Front Panel VFP software in conjunction with a Personal Computer PC Virtual Front Panel The Virtual Front Panel VFP software supplied on CD with the radio is compatible with any PC or laptop running Windows 2000 or Windows XP The VFP allows changes to a radio s settings and channel information it displays the current BIT state displays BIT history allows security locks to b...

Page 10: ...Back to Transmitter Main Page Intentionally Blank ...

Page 11: ...This section gives the specification applicable to the T6T VHF 100 W Multimode Transmitter operating in AM modes Mode 2 and Mode 3 All radios operate in AM Voice mode Additional software must be loaded to allow AM MSK Mode 2 and Mode 3 operation ...

Page 12: ...ies are connected the dc input acts as an automatic backup for the ac mains ac input supply The transmitter operates from a 48 to 62 Hz single phase ac supply and automatically adjusts to operate from any supply voltage ranging from 110 Vac to 230 Vac 10 The power consumption figures are given in Table 2 dc input supply The transmitter operates from a dc input supply between 21 6 and 32 V measured...

Page 13: ...ausing any damage Humidity The transmitter operates to specification at a relative humidity between 5 and 90 non condensing Altitude The transmitter operates to specification up to 15 000 feet Additionally it is capable of storage at altitudes up to 50 000 feet without damage Shock and vibration The transmitter complies with shock and vibration protection MIL STD 810E method 516 4 procedure VI Ben...

Page 14: ...in 1 dB into a VSWR of up to 2 5 1 At a VSWR greater than this the output power may be reduced by 10 dB 1 dB High RF PA temperature If the RF PA temperature sensor exceeds 80 C the output power is reduced by 3 dB 1 dB If the RF PA temperature sensor exceeds 90 C the transmitter is de keyed and automatically re keyed at 70 C PA Module Failure If one of the two PA modules fails the transmitter will ...

Page 15: ... depths up to 95 Hum and Noise Both modes The hum and noise is more than 45 dB below the signal level for line input levels 13 dBm and more than 50 dB below the signal level for line input levels 13 dBm for a carrier modulated by a 1 kHz signal with a modulation depth of 90 Frequency Response 25 kHz channel spacing AM Voice and AM MSK The variation in frequency response with reference to a 1 kHz s...

Page 16: ...evel is set at 15 dB below the average speech line level setting The mute can be disabled AM MSK The mute is disabled Differential Group Delay AM MSK There is less than 60 µs differential group delay for signals in the range 1200 to 2400 Hz Transmitter Control Transmitter control characteristics are as follows Audio Inputs Voice can be connected to the transmitter via the front panel microphone co...

Page 17: ...ulation Characteristics Mode 2 uses Carrier Sense Multiple Access CSMA differentially encoded 8 phase shift keying D8PSK using a raised cosine filter with α 0 6 nominal value emission designator 14K0G1DE Information is differentially encoded with 3 bits per symbol transmitted as changes in phase rather than absolute phase The data stream is divided into groups of 3 consecutive data bits least sign...

Page 18: ...ulation Characteristics Mode 3 uses Time Division Multiple Access TDMA differentially encoded 8 phase shift keying D8PSK using a raised cosine filter with α 0 6 nominal value emission designator 14K0G7WET Information is differentially encoded with 3 bits per symbol transmitted as changes in phase rather than absolute phase The data stream is divided into groups of 3 consecutive data bits least sig...

Page 19: ...Back to Transmitter Main Page Operation This topic describes the transmitter s operating controls and indicators It also details how to set up the transmitter s operating parameters ...

Page 20: ...icator that lights when the transmitter is ready for use and no BIT faults have been detected Transmit Indicator An amber indicator that lights when the transmit circuit is keyed and producing output power Alarm Indicator A red indicator that either flashes or lights when a BIT fault has been detected BIT indications are classified as either Alarms or Alerts If an alert condition is detected the A...

Page 21: ... dual purpose connector that allows either a microphone or a PC to be connected to the transmitter The connector is a 7 pin self locking DIN socket the pin out is shown in Table 1 A microphone is fitted to this connector to enable the transmitter to be operated in AM local mode The connections are detailed in Table 1 A PC can also be connected to allow the VFP to be displayed Using the VFP is deta...

Page 22: ...andby position dangerous voltages are still present in the transmitter s internal power supply circuitry To ensure safe working the transmitter must be isolated from the ac and dc input supplies 4 Receive data Input RS232 115200 baud 8 data bits 1 stop bit no parity no handshaking 7 Ground 0 V Table 2 Microphone Diagnostics Connector PC Connections Pin Number Signal Input or Output Description WAR...

Page 23: ...ing normal operation the LCD displays the Main screen This screen shows the operating frequency the channel number if the channel store facility is used the carrier offset if used and displays a graphical representation of output power when the transmitter is keyed If the transmitter has been set to Standby mode which is shown by the front panel Standby indicator being lit the LCD is blanked Using...

Page 24: ... Scroll Select switch is not operated for 30 seconds the display returns to the Main screen If editing any parameter has not been completed the transmitter stays on the original setting Indicates more fields are available other than those currently displayed To access those fields turn the switch clockwise through the last displayed field Indicates more fields are available other than those curren...

Page 25: ...ities Set the active polarity for certainhardwire connections Backlight Adjust the display s backlight AM Voice Mode Settings see page 17 AM MSK Mode Settings see page 19 Digital Modes see page 20 Mode and Mode Settings Select Mode Menu Lock Screen Main Screen Example Displayed during normal transmitter operation Frequency Set the transmitter operating frequency Channel Set or recall up to 100 pre...

Page 26: ...OK then press the switch You are returned to the Main screen or Wait for the 30 second time out to expire You are returned to the Main screen Control Screen The Control screen is entered from the Main screen by pressing the switch The following screen is displayed S E C U R I T Y M E S S A G E F r o n t P a n e l L o c k e d O K F r e q u e n c y C h a n n e l S e t t i n g s E x i t B I T S W C o...

Page 27: ...tter s frequency range The display conforms to ICAO convention for 8 33 kHz operation Table 3 25 kHz and 8 33 kHz Channel Spacing Displays Actual Frequency to 4 decimal places Channel Spacing Displayed Frequency at Transmitter s Front Panel 118 0000 MHz 118 0000 MHz 118 0083 MHz 118 0166 MHz 118 0250 MHz 118 0250 MHz 118 0333 MHz 118 0416 MHz 118 0500 MHz 118 0500 MHz 118 0583 MHz 118 0666 MHz 118...

Page 28: ... should be set to 10 dB above the line level setting The VOGAD and mute thresholds are preset at 10 dB and 15 dB respectively below the line level setting Table 4 shows the relationship between the input line level VOGAD threshold and mute threshold Table 4 Relationship Between Line Level VOGAD Threshold and Mute Threshold Line Level Setting dBm Average Speech Level dBm Sine Wave Level dBm VOGAD T...

Page 29: ... the use of the Frequency screen F r e q 1 1 8 0 0 0 M H z C a n c e l O K 1 From the Control screen select frequency to display the Frequency screen 2 Turn the switch to highlight the digit to be changed then press the switch 3 Turn the switch until the required digit is shown then press the switch 4 Repeat until the required frequency is shown then highlight OK and press the switch 5 Only freque...

Page 30: ...ch 3 Highlight the kHz frequency value see Example 3 press the switch and then turn it until the required kHz value is shown Press the switch 4 Highlight Store and press the switch The new frequency is now stored in the selected channel number To recall a Stored Frequency Channel 1 From the Control screen select Channel to display the Channel screen 2 To make the transmitter operate on any preset ...

Page 31: ... highlighted Press the switch 3 During the test which takes approximately two seconds the Testing screen is displayed B I T I n i t i a t e E T I 0 0 0 0 0 0 0 h r s A C S u p p l y O N E x i t T e s t i n g P l e a s e W a i t During an interruptive BIT test the transmitter radiates modulated carrier waves at the set power Users should therefore obtain the necessary authority before initiating a ...

Page 32: ... mode most of the transmitter s circuits are inactive the LCD is blanked and the transmitter cannot be keyed To put the transmitter into standby mode use the following procedure When the transmitter is in Standby mode the red front panel Standby indicator is lit To Enter Standby Mode To Exit Standby Mode T e s t S t a t u s P A S S O K T e s t S t a t u s F A I L O K E n t e r S t a n d b y Y e s ...

Page 33: ...er is taken to other screens General and mode specific settings showing default values are referenced in Table 5 on the following page Click on any required parameter by page number for further references M o d e A M V o i c e M o d e S e t t i n g s P o l a r i t i e s E x i t B a n d E d g e s R e f F r e q 5 0 0 B a c k l i g h t 0 3 0 s E x i t B a c k E x i t Select between AM Voice AM MSK Mo...

Page 34: ...and page 19 Inhibit AM Voice AM MSK On or Off Off page 17 and page 19 PTT key AM Voice AM MSK On key Off de key Off page 17 and page 19 Tx time out AM Voice AM MSK 2 to 510 s or Off 180 s page 17 and page 19 Modulation depth AM Voice AM MSK 5 to 95 85 page 17 and page 19 Mute AM Voice On or Off On page 17 VOGAD AM Voice On or Off On page 17 Antenna C O delay AM Voice AM MSK On or Off On Off page 1...

Page 35: ...disable local PTT Enable or disable remote PTT Enable or disable remote phantom PTT AM Voice Mode Settings Screen The AM Voice mode setting screen is accessed from the Settings screen Use the Scroll Select switch to select the parameter then enter the required setting s P o w e r 1 0 0 W L i n e I n 1 3 d B m I n h i b i t O F F E x i t P T T O F F T X T i m e o u t 1 8 0 s M o d D e p t h 8 5 E x...

Page 36: ...S S I V E E x i t K e y P r i o r i t y L R L o c a l P T T E N R e m o t e P T T E N E x i t R e m P h a n P T T E N B a c k E x i t Adjustments 0 2 5 4 5 7 3 7 5 8 kHz 25 kHz 8 33 kHz or both Active or Passive Local remote or Remote local Enabled or Disabled Enabled or Disabled Enabled or Disabled Return to Settings screen ...

Page 37: ...ettings Screens The AM MSK mode setting screen is accessed from the Settings screen Use the Scroll Select switch to select the parameter then enter the required setting s P o w e r 1 0 0 W L i n e I n 1 3 d B m I n h i b i t O F F E x i t P T T O F F T X T i m e o u t 1 8 0 s M o d D e p t h 8 5 E x i t A n t C O D e l O N K e y P r i o r i t y L R L o c a l P T T E N E x i t R e m o t e P T T E N...

Page 38: ...creen Pressing OK returns the user to the Main screen Mode 3 Settings Screen This is an advisory screen Pressing OK returns the user to the Main screen M o d e 2 p a r a m e t e r s a r e s e t v i a t h e H L D C i n t e r f a c e O K M o d e 3 p a r a m e t e r s a r e s e t v i a t h e T 1 E 1 i n t e r f a c e O K ...

Page 39: ...licable to the operational mode of the transmitter The Polarities screen is accessed from the Settings screen AM Voice and AM MSK Polarity Settings Each of ten polarity settings applicable to AM Voice and AM MSK can be set to the default STD standard setting or INV inverted The signal connections are shown in Table 6 along with the conditions when STD or INV is selected The settings for the PTT Re...

Page 40: ...ill draw no more than 6 mA requires at least 1 mA to operate Phantom PTT In Phan PTT In MARC or MARC Audio pin 2 Active when input differs from reference by more than 10 V Inactive when input differs from reference by less than 1 V Maximum input level 60 V with respect to reference Input will draw no more than 6 mA requires at least 1 mA to operate Active when input differs from reference by less ...

Page 41: ...the PTT reference differ by more than 10 V the radio keys When the input PTT signal and the PTT reference are within 1 V the radio dekeys Other conditions are indeterminable PTT Ref can be set to 14 V 0 V or 14 V PTT Maximum input level 60 V with respect to PTT reference Input will draw no more than 6 mA and requires at least 1 mA to operate When the input PTT signal and the PTT reference differ b...

Page 42: ...ut when the radio is ready to transmit and no BIT faults are detected E BIT In Facilities pin 2 TTL input 0 V indicates an external fault TTL input 5 V indicates an external fault External VSWR Input Facilities pin 4 TTL input 0 V active TTL input 5 V active R e a d y O u t S T D E B I T I n S T D E x t V S W R I n S T D E x i t B a c k E x i t Each of the three polarity settings applicable to Mod...

Page 43: ... S S P A L o o p P A S S E x i t M o d D e p t h P A S S R F F i l t e r s P A S S V S W R P A S S E x i t L o o p E r r o r P A S S A u d i o I n P A S S D S P 1 P A S S E x i t Select to initiate BIT test Shows elapsed time 0 00 to 99999 59 Hrs Min Shows state of ac supply On or Off PA temperature 20 C to 150 C Pass or Fail Pass Fail or Not Tested Pass Fail or Not Tested Pass Fail or Not Tested ...

Page 44: ...S S S t a r t U p P A S S C a l i b r a t i o n P A S S E x i t U n k e y e d P w r P A S S E B I T P A S S M A R C A C T I V E E x i t H D L C I N A C T I V E T 1 E 1 I N A C T I V E B a c k E x i t Pass or Fail Pass or Fail Pass or Fail Pass or Fail Pass or Fail Active or Inactive Pass or Fail Pass or Fail Pass or Fail Active or Inactive Active or Inactive ...

Page 45: ... i n x 1 P A S S E x i t X i l i n x 2 P A S S E E P R O M P A S S S t a r t U p P A S S E x i t C a l i b r a t i o n P A S S E B I T P A S S M A R C A C T I V E E x i t Shows elapsed time 0 00 to 99999 59 Hrs Min Shows state of ac supply On or Off Shows state of dc supply On or Off Shows value of dc supply Synth lock Pass or Fail Indicates the PA temperature Pass or Fail Pass or Fail Pass or Fai...

Page 46: ... l 1 S o f t w a r e 6 5 x x x x x x x x v v D e s c r i p t i o n E x i t F i l l 2 S o f t w a r e 6 5 x x x x x x x x v v D e s c r i p t i o n E x i t The first screen defines the radio 65 xxxxxxxx represents the software part number and v v represents its version 65 xxxxxxxx represents the software part number and v v represents its version Current mode running 65 xxxxxxxx represents the soft...

Page 47: ... f t w a r e 6 5 x x x x x x x x v v D e s c r i p t i o n F i l l 4 S o f t w a r e 6 5 x x x x x x x x v v D e s c r i p t i o n 65 xxxxxxxx represents the software part number and v v represents its version 65 xxxxxxxx represents the software part number and v v represents its version ...

Page 48: ...nsmitted 118 000 136 975 118 000 136 975 Example Transmitter set to transmit only those frequencies in the range 120 to 130 MHz 120 000 130 000 120 000 130 000 Example Transmitter set to transmit only those frequencies in the ranges 120 to 125 MHz and 130 to 135 MHz 120 000 125 000 130 000 135 000 B E 1 1 1 8 0 0 0 M H z B E 2 1 3 6 9 7 5 M H z B E 3 1 1 8 0 0 0 M H z E x i t B E 4 1 3 6 9 7 5 M H...

Page 49: ... R T R F P o w e r R e d u c e d L o o p E r r o r S u p p l y 2 1 V A L E R T R F P o w e r R e d u c e d P A T e m p 8 5 d e g C A L A R M R F P o w e r R e d u c e d V S W R F A I L A L A R M R F P o w e r R e m o v e d L o o p E r r o r F A I L S u p p l y 1 8 V A L A R M R F P o w e r R e m o v e d P A T e m p 9 5 d e g C Alert There is no RF power reduction The Alarm indicator is flashing Al...

Page 50: ... SETTINGS Set modulation mode AM Voice Radio Settings AM Modes Set RF output power 100 W Set audio input line level 13 dBm Set inhibit on or off Off PTT test facility on key off de key View state Off Set Tx time out 180 s Set modulation depth 85 Set mute on or off AM Voice only On Set VOGAD on or off AM Voice only On Set antenna C O delay on or off AM Voice On AM MSK Off Set frequency offset AM Vo...

Page 51: ...tom PTT Enabled Radio Settings Digital Modes MAC TM1 inter access delay 2 5 ms MAC TM2 channel busy 60 s MAC p persistance 13 256 MAC M1 maximum number of access attempts 135 Scramble vector 4D4B 19787 Tx enable On Polarities Ready out View state STD Set PTT input polarity AM modes only View state STD Set phantom PTT input polarity AM modes only View state STD Continued Table 9 Functions and Param...

Page 52: ...TD Set external VSWR input polarity All modes View state STD Set inhibit input polarity AM modes only View state STD BIT interruptive test input polarity AM modes only View state STD active low E bit input polarity All modes View state STD active low Band Edges Set band edges 118 000 and 136 975 MHz Reference Frequency Adjust transmitter s reference frequency LCD Backlight Adjust LCD backlight 30 ...

Page 53: ...BY Enter and exit standby facility Not in Standby SOFTWARE CONFIGURATION View the transmitter s software configuration LOCK FACILITIES Front panel lock Off MARC lock Off T1 E1 lock Off HDLC lock Off Table 9 Functions and Parameters Continued Function Front Panel VFP MARC T6 Controller T1 E1 HDLC Default Setting ...

Page 54: ...Back to Transmitter Main Page Intentionally Blank ...

Page 55: ...Back to Transmitter Main Page Installation This topic gives the information required to install a T6T VHF 100 W Multimode Transmitter ...

Page 56: ...th live and neutral supplies be clearly labelled and adequately rated to protect the equipment The antenna used with the transmitter must be installed such that the resultant radiated field strength is below 10 W m in areas normally accessible to personnel The T6T transmitter s circuitry contains Electrostatic Sensitive Devices ESSDs Personnel must be aware of the precautions necessary to prevent ...

Page 57: ...Connect the chassis stud to the cabinet or system earth page 22 6 Connect the antenna page 22 7 Connect the dc input supply if required page 22 8 Connect the ac input supply if required page 23 Table 2 Fuses and Connectors Component Type Park Air Part Number Fuses AC input fuses F3 F4 for 110 120 V input AC input fuses F3 F4 for 220 230 V input T4A 125V UL T4A 250V IEC 29C11120102S 29E01120108S DC...

Page 58: ... 1 T6T Transmitter Configured for Local Operation For local operation the transmitter is operated from the front panel using a microphone headset Any of the optional facilities may be connected Antenna Connector Reference Connector Microphone Diagnostics Connector Frequency Counter required only for maintenance Facilities Connector T6T Transmitter E BIT input PTT relay output External VSWR input d...

Page 59: ...or alternatively on the MARC Data connector Any of the optional facilities may be connected Antenna Connector Microphone Diagnostics Connector MARC Connector or MARC Audio Connector Mic Headset for engineering use Laptop or PC required only for maintenance T6T Transmitter Optional Facilities that can be used if required E BIT input PTT relay output External VSWR input dc supply output Inhibit inpu...

Page 60: ...cted Antenna Connector Reference Connector Microphone Diagnostics Connector T6T Transmitter Equipment Connector RSE2 MARC Connector Audio PTT RS422 data dc supply output E BIT input PTT relay output External VSWR input Unregulated supply output Inhibit input BIT interruptive test input Antenna change over output Ready output Tape output Facilities Connector Frequency Counter required only for main...

Page 61: ...ector Reference Connector Microphone Diagnostics Connector Reference Connector Headset Diagnostics Connector T1 E1 Connector Fast Antenna Change Over Switch Antenna c o control Mode 2 Network Computer Laptop or PC required only for maintenance Connects to the Microphone Diagnostics connector Frequency Counter required only for maintenance Connects to the Reference connector Control and data Contro...

Page 62: ...Fig 5 T6T Transmitter Mode 3 Configuration Antenna Connector T6T Transmitter T1 E1 Connector Reference Connector Microphone Diagnostics Connector Mode 3 Network Computer Control and data Frequency Counter required only for maintenance Laptop or PC required only for maintenance ...

Page 63: ...hosen mechanical installation provides adequate support along the depth front to rear of the unit The transmitter must not be supported by the front panel doing so can cause damage The transmitter can be installed on telescopic slides or on fixed runners within a standard 483 mm 19 inch equipment cabinet M4 tapped holes each 10 mm deep see Fig 6 are provided on each side of the equipment to accept...

Page 64: ...tter to suit its operational mode Illustrations showing various configurations are shown in Fig 1 to Fig 5 these figures should be used only as a guide Front Panel Connectors The front panel has two connectors Microphone Diagnostics and Reference connectors These are illustrated in Fig 7 Fig 7 Front Panel 3 4 2 1 M4 x 8 mm Half Head Bolt M4 Wavy Washer Inner Slide Transmitter Description 4 3 2 1 I...

Page 65: ...onnector Pin Number Signal Characteristic Usage 1 Microphone ground 0 V Microphone Headset 2 Transmit data RS232 115200 baud 8 data bits 1 stop bit no parity no handshaking PC 3 Microphone PTT 0 V to PTT Microphone Headset 4 Receive data RS232 115200 baud 8 data bits 1 stop bit no parity no handshaking PC 5 Sidetone Microphone Headset 6 Microphone input To ensure correct VOGAD operation the follow...

Page 66: ...rnative to the MARC connector for terminating remote audio and PTT signals MARC data RJ48 Used as an alternative to the MARC connector for terminating data signals to and from a compatible data system Facilities 15 way D type Provides a number of optional facilities that can be used as required T1 E1 RJ48 Used for connecting the radio to a Mode 3 network computer connecting a transmitter and recei...

Page 67: ...line level setting See the information supplied under the heading Line Level Setting in Operation Table 5 MARC Connector Pin Number Signal Characteristic 1 Ground 0 V 2 3 Audio line in Audio line in Balanced 600 ohm 20 to 20 dBm Phantom keying can be superimposed on the audio lines See Fig 10 4 PTT input Remote PTT signal input See Fig 9 5 Output supply This output is between 21 6 and 32 Vdc nomin...

Page 68: ...10 dB above the line level setting See the information supplied under the heading Line Level Setting in Operation Table 6 MARC Audio Connector Pin Number Signal Characteristic 1 2 Audio line in Audio line in Balanced 600 ohm 20 to 20 dBm Phantom keying can be superimposed on the audio lines See Fig 10 3 Fast antenna change over PTT output Open collector NPN transistor grounding output 200 mA max c...

Page 69: ... or MARC Audio Connector Control Equipment Ground is pin 7 Ground is pin 1 T6T Transmitter PTT Switch Reference Voltage 0 V 14 V or 14 V Set from front panel VPTT To reduce the number of cross site lines between the control site and the transmitter phantom keying may be employed This method has the keying potential VPTT superimposed on the audio lines instead of using a separate line The transmitt...

Page 70: ...22 differential asynchronous data 9600 baud 8 data bits 1 stop bit no parity no handshaking 3 Not connected 4 5 Data out Data out RS422 differential asynchronous data 9600 baud 8 data bits 1 stop bit no parity no handshaking 6 Remote supply ON OFF 0 V to switch off Note Rear panel switch must be in the ON position for this function to operate 7 Ground 0 V 8 Output supply This output is between 21 ...

Page 71: ...second 50 ppm AMI B8ZS Coding E1 Balanced 120 ohm 10 2 048 Mbits per second 50 ppm AMI HDB3 Coding Protected with 28 V differential and common mode clamp and 1 25 A fuse in each line 2 RTip 3 Not connected 4 TRing T1 Balanced 100 ohm 10 1 544 Mbits per second 50 ppm AMI B8ZS Coding E1 Balanced 120 ohm 10 2 048 Mbits per second 50 ppm AMI HDB3 Coding Protected with 28 V differential and common mode...

Page 72: ...al synchronous data 128 kbytes per second 50 ppm 2 HDLC RX B input 3 HDLC CL A output RS422 differential synchronous data 128 kbytes per second 50 ppm 4 HDLC TX B output RS422 differential synchronous data 128 kbytes per second 50 ppm 5 HDLC TX A output 6 HDLC CL B output Pair to pin 3 7 Ground 0 V 8 Output supply This output is between 21 6 and 32 Vdc nominally 28 V fused at 500 mA Pin 1 RJ48 Plu...

Page 73: ...eo jack used for connecting an external speaker to the transmitter to provide sidetone This speaker should be a high impedance active type Table 10 External Speaker Pin Signal Characteristic Tip Speaker drive output 0 to 3 V pk pk Connected directly to Ring Ring Speaker drive output 0 to 3 V pk pk Connected directly to Tip Sleeve Ground 0 V ...

Page 74: ... with 4 7 kohm pull up to 5 V Configurable active high or low 5 6 Antenna change over output Antenna change over common output Solid state relay linked to pin 6 See Fig 11 for further detail Solid state relay linked to pin 5 7 Not used 8 Ground 0 V 9 Output supply This output is between 21 6 and 32 Vdc nominally 28 V fused at 500 mA 10 Inhibit input Active signal prevents the transmitter keying TT...

Page 75: ... is switched through to pin 5 when the standby transmitter is keyed in this example pin 6 is linked to ground This energizes the Main Standby Transmit Relay to route the standby transmitter to the antenna Other Configurations The antenna change over output can be configured in other ways to suit the user s requirement subject to Pin 6 can be any potential between 60 and 60 Vac or dc The maximum cu...

Page 76: ...mber 20 08010103 Failure to comply with this instruction could result in non compliance with the European Commission EMC Directive 89 336 EEC Connect the Antenna The antenna connector is an N type socket suitable for connecting a 50 ohm antenna Connect the DC Input Supply The transmitter operates from either an ac or a dc input supply When both ac and dc are connected operation from the ac supply ...

Page 77: ...llowing specification If PVC insulated be not lighter than ordinary polyvinyl chloride sheathed flexible cord according to IEC publication 227 designation H05 VV F or H05 VVH2 F If rubber insulated be of synthetic rubber and not lighter than ordinary tough rubber sheathed flexible cord according to IEC publication 245 titled Rubber Insulated Cables of Rated Voltages up to and Including 450 750 V d...

Page 78: ...few seconds when the radio is switched on The bottom row begins empty and dots are added as the initialisation progresses When the initialisation is complete the Main Screen is displayed Setting Up When installation has been successfully completed the transmitter must be set up using the front panel controls or the VFP Setting up is detailed in the Operation section of this documentation T 6 D i g...

Page 79: ...Back to Transmitter Main Page Maintenance This topic gives scheduled maintenance procedures details module replacement and describes how to use the Virtual Front Panel VFP ...

Page 80: ...re and Software Configuration Spare modules received from Park Air are supplied with a Spares Instruction that details the configuration of the module and any special instructions If in any doubt regarding the suitability of spare modules contact Park Air Customer Support Scheduled Maintenance A scheduled maintenance procedure is given on page 3 Park Air recommends that this task be completed ever...

Page 81: ... Tools Test Equipment Required 1 Ensure the equipment is clean and that external connectors are securely fitted Camel hair brush clean lint free cloths 2 Check and reset if required the transmitter s internal frequency reference VHF frequency counter 3 Perform a BIT interruptive test 4 Perform an ac and dc change over check if both supplies are connected Control Screen Settings Screen F r e q u e ...

Page 82: ...creen in the Operation section of this document and set the desired 5 carrier offset Refer to Changing the Transmitter Operating Frequency in the Operation section and set the transmitter to the nearest 25 kHz channel frequency For example if the required frequency is 124 504 4 kHz offset set the transmitter to 124 500 MHz Key the transmitter and adjust the reference frequency using the front pane...

Page 83: ...rough the screen to check the cause of the failure During an interruptive BIT test the transmitter radiates modulated carrier waves at the set power Users should therefore obtain the necessary authority before initiating a test If the test is to be carried out with the antenna disconnected ensure a load is fitted to the transmitter s Antenna connector In order to test the line input stages an inte...

Page 84: ...ed to the transmitter Ensure that the rear panel Power switch is set to the I on position 2 Confirm that the front panel Ready indicator is lit the LCD is illuminated and the transmitter is operational 3 Switch off the ac supply from its source 4 Check that the transmitter continues to operate correctly from the dc supply If accessed the front panel BIT screen will show AC Supply as off and DC Sup...

Page 85: ...w 10 W m in areas normally accessible to personnel The T6 transmitter circuitry contains Electrostatic Sensitive Devices ESSDs Personnel must be aware of the precautions necessary to prevent damage to such devices Changes or modifications made to this equipment that are not expressly approved by Park Air or parties authorized by Park Air could void the user s authority to operate the equipment Whe...

Page 86: ... then move the other side up see the following diagram The upward motion should only be as far as needed to free the locking mechanism DO NOT pull the cable to free the connector Note that KK type connectors are designed to be removed in this manner to free the locking mechanism Do not use this procedure with non KK type connectors as damage to the connector may occur Tools Materials and Test Equi...

Page 87: ...sonnel to avoid accidental contact with exposed circuitry when the covers are removed and power is applied to the radio Removal Before attempting to remove the Processor module and if possible save the radio settings Connect a PC with the VFP software loaded to the radio using the PC to Radio Interconnection Lead Park Air part number 17E12600001 With the VFP software active upload the radio settin...

Page 88: ...rol module CN1 CN3 14 way connector 14 way ribbon cable from PSU Regulator module CN4 CN4 34 way connector 34 way ribbon cable from Front Panel module CN1 6 Re establish the ac and or dc supplies 7 Switch power on at the radio using the rear mounted Power switch 8 Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit 9 If a new module has been fitted connect the VFP PC to ...

Page 89: ...dental contact with exposed circuitry when the covers are removed and power is applied to the radio Removal Before attempting to remove the PSU Regulation module ensure that the transmitter is isolated from the ac and dc input supplies Then proceed as follows 1 Unscrew the 19 countersunk screws and remove the transmitter top cover 2 Locate the PSU Regulation module and remove the three M3 x 8 mm c...

Page 90: ...mbiner BIT module CN12 CN5 10 way connector 10 way ribbon cable to PA Control module CN6 2 Locate the module in position Ensure no wires are trapped by the module 3 Secure the module to the transmitter mainframe using the three M3 x 8 mm captive washer screws removed during disassembly 4 Re establish the ac and or dc supplies 5 Switch power on at the radio using the rear mounted Power switch 6 Ens...

Page 91: ...BIT module CN27 CN2 6 way connector 6 wire loom to Combiner BIT module CN15 3 Remove the eight M3 x 8 mm captive washer screws that secure the module to the mainframe 4 Remove the module from the chassis Refitting To refit the PA Control module proceed as follows 1 Place the module in position Ensure no wires are trapped by the module 2 Fit the eight M3 x 8 mm captive washer screws previously remo...

Page 92: ...e transmitter is isolated from the ac and dc input supplies Then proceed as follows 1 Remove the transmitter top and bottom covers as described previously 2 Support the radio on its side 3 Locate the power supplies From the bottom half of the unit remove the two No 6 x 32 UNC countersunk screws that secure each power supply to the transmitter mainframe These screws are accessed through clearance h...

Page 93: ...o terminal 5 and terminal 6 4 Connect CN4 5 Taking care not to damage the plastic supply guard lower the power supply into position and secure from the bottom half of the unit using two countersunk screws previously removed for each power supply 6 Re establish the ac and or dc supplies 7 Switch power on at the radio using the rear mounted Power switch 8 Ensure the front panel Ready indicator is li...

Page 94: ...le and disconnect the following connectors CN1 4 way connector CN2 3 way connector CN3 4 way connector CN4 3 way connector CN5 3 way connector CN6 3 way connector CN7 8 way connector CN10 3 way connector CN11 3 way connector CN12 6 way connector CN13 6 way connector CN14 6 way connector CN15 10 way connector CN16 SMB connector CN17 SMB connector CN18 SMB connector CN22 QMA connector CN23 QMA conne...

Page 95: ...countersunk M3 x 6 mm screws Tighten these and return to the other side to tighten the six nuts and two screws 3 All 22 connectors removed earlier can now be reconnected Refer to Fig 6 and Fig 7 if necessary 4 Re establish the ac and or dc supplies 5 Switch power on at the radio using the rear mounted Power switch 6 Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit 7 C...

Page 96: ...l to avoid accidental contact with exposed circuitry when the covers are removed and power is applied to the radio Removal Before attempting to remove one or both PA modules ensure that the transmitter is isolated from the ac and dc input supplies Then proceed as follows 1 Remove the transmitter top and bottom covers 2 Disconnect CN3 a flying 3 way connector from the Combiner BIT module CN5 PA 1 a...

Page 97: ...Ensure no wires are trapped by the module 3 Next while placing the upper PA module in position first connect SMB connector CN10 before replacing the two rear screws and the front countersunk screw Route the coaxial cable from Combiner BIT module out between the PAs via the heatsink groove Connect the type N to CN1 4 Fit the four countersunk screws previously removed that secure the front panel to ...

Page 98: ...Remove the two handles from the front panel by removing the four M5 x 20 mm panhead screws 6 Remove the four countersunk M3 x 6 mm screws that hold the front panel to the chassis The front panel can now be moved away from the mainframe while guiding the ribbon and coaxial cables from within 7 With the front panel free from the mainframe release the control knob by unscrewing the Allen head grub sc...

Page 99: ...y when the covers are removed and power is applied to the radio Removal Before attempting to remove the fan ensure that the transmitter is isolated from the ac and dc input supplies Then proceed as follows 1 Disconnect the two pin connector 2 Remove the fan finger guard 3 Using an Allen key inserted through the holes exposed when the finger guard is removed remove the three M4 x 12 mm caphead Alle...

Page 100: ... panel these are A profile of the transmitter s operation settings and channel information can be created stored on disk and then recalled to download into other transmitters A print out of the transmitter s profile can be made from the VFP Front Panel Lock is available only when using the VFP As part of the transmitter s Settings see Fig 2 Front Panel Lock can be set to ON When selected to on no ...

Page 101: ...as been rejected by the radio or a BIT failure Green indicates text that has not yet been downloaded to the radio Text loaded into the VFP from a previously stored file or any text that is manually amended is green until it is downloaded into the radio after being downloaded into the radio the text changes to black or if it is invalid to red Blue indicates Help text and is shown in the Status Info...

Page 102: ...sing the radio front panel controls as detailed on page 3 Channels Window Up to 100 preset channels can be stored in the radio These are listed in the Channels window Any channel frequency can be amended by clicking on the value to amend it and pressing Enter to confirm the new value Note that the amended channel is green until it is downloaded into the radio Any invalid frequencies are not indica...

Page 103: ...these To load a previously stored file select File Open All or File Open Settings or File Open Channel or File Open BIT To load information from the radio select Radio Retrieve All or Radio Retrieve Settings or Radio Retrieve Channel or Radio Retrieve BIT 5 If required amend any radio Settings or Channel information 6 Download the radio s profile as shown on the VFP screen to either the radio or t...

Page 104: ...er 1 Connect a dummy load via a power meter to the transmitter Antenna connector 2 Remove the transmitter s bottom cover 3 Using a radio to PC Serial Interconnection Lead Park Air part number 17E12600001 connect the radio s front panel Microphone Diagnostics connector to the PC s Com Port 1 or Com Port 2 note which Com Port is used 4 Run up the VFP software and check that a blank VFP screen is dis...

Page 105: ...he Status Information window 10 Gain access to the PA Control module and identify RV8 see Fig 4 From the transmitter front panel AM Voice or AM MSK Settings screen select PTT On 11 From the Settings window of the VFP screen note the RF power setting Adjust RV8 until the power meter reads this value 12 From the transmitter front panel AM Voice or AM MSK Settings screen select PTT Off then remove th...

Page 106: ...ransmitter Page 28 Maintenance Back to Transmitter Main Page Location of RV8 Fig 4 Location of PA Control Module RV8 R130 R131 R125 C421 R135 RV8 CN4 R455 R456 C424 R348 D24 R231 R382 R243 TP10 Small Screening Can RV8 ...

Page 107: ...k to Transmitter Main Page Fig 5 T6T 100 W Module Location Diagram Processor Module PSU 1 PSU 2 PA 2 PA Control Module Combiner BIT Module BOTTOM TOP PSU Regulation Module PA 1 SIDE REAR FRONT Cooling Fans ...

Page 108: ...6 CN17 CN22 CN10 CN1 CN8 CN2 CN4 CN5 CN7 CN9 CN6 CN12 PA 1 PA 1 PA 1 PA 1 CN3 CN14 CN6 CN25 CN18 CN23 Fan CN10 CN1 CN8 CN3 CN2 CN4 CN5 CN7 CN9 CN6 CN12 PA 2 PA 2 PA 2 PA 2 1L 2N 3E 5 7 8 25 24 23 17 17 19 20 20 11 12 13 14 15 11 12 13 14 15 16 3 1 2 4 9 10 10 6 19 22 21 26 18 A B C D 17 17 Rear Panel PinNumber Connections A CN7 6 CN7 7 CN7 8 CN7 2 CN7 4 CN7 3 CN7 5 CN7 1 Pin Number Connections B C...

Page 109: ...me Characteristic TTL pull up active low Grounding output 60V 100mA max TTL pull up active low 0V 0V Fused 300mA 21 6 to 32V Open collector 0V Ready 10dBm 100R TTL pull up active low n c TTL pull up active low TTL pull up activel ow Potential range 0V to 10V Facilities Processor Grounding output 60V 100mA max Grounding output 60V 100mAmax Connections 3 Name Characteristic Squelch Defeat not used A...

Page 110: ...Back to Transmitter Main Page Fig 8 Processor Module Removal and Refitting Detail CN6 CN5 CN4 CN3 CN1 ...

Page 111: ...Back to Transmitter Main Page Fig 9 PSU Regulation Module Removal and Refitting Detail CN3 CN1 CN4 CN5 CN2 CN6 CN7 ...

Page 112: ...Back to Transmitter Main Page Fig 10 PA Control Module Removal and Refitting Detail CN4 CN3 CN6 CN1 CN2 CN5 behind box ...

Page 113: ...nsmitter Main Page Fig 11 Power Supply Removal and Refitting Detail PSU to Bit Combiner dc Connections Bit Combiner to PSU fan control PSU to Bit Combiner dc Connections Bit Combiner to PSU fan control PSU 2 PSU 1 ...

Page 114: ...k to Transmitter Main Page Fig 12 Combiner BIT Module Removal and Refitting Detail CN5 CN6 CN7 CN12 CN15 CN14 CN13 CN26 CN25 CN27 CN1 CN3 CN2 CN4 CN22 CN23 CN24 CN18 CN17 CN16 Locations CN11 CN10 Connector ...

Page 115: ...Back to Transmitter Main Page Fig 13 PA Modules Removal and Refitting Detail PA 1 PA 2 ...

Page 116: ...Back to Transmitter Main Page Fig 14 Front Panel and Front Panel Assembly PCB Removal and Refitting Detail ...

Page 117: ...Back to Transmitter Main Page Fig 15 Cooling Fans Removal and Refitting Detail power connections here Finger guard AIRFLOW ...

Page 118: ...Back to Transmitter Main Page Intentionally Blank ...

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Park Air Systems T6T, User Documentation

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