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PPM ViaLiteHD Blue2 Link, Руководство пользователя

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PPM ViaLiteHD Blue2 Link Скачать руководство пользователя страница 26

V

IA

L

ITE

HD-B

LUE

2-L

INK

-H

ANDBOOK

-HRX-XX-8X-35-XXXXX

 

 

26

 

3.12  Spurious free dynamic range 

The dynamic range of the system is fundamentally set by the choice of laser and the optical loss.  
Transmitter and receiver gain can be used to optimise this for particular applications.  All standard 

ViaLiteHD

 links are equipped with high power DFB lasers to give maximum dynamic range. 

3.13  Phase noise 

The 

ViaLiteHD

 link does not have any mixing or frequency conversion in the main RF path, but some 

residual phase noise can be measured.  This phase noise is introduced by both the RF amplification 
elements  and  the  laser  control-loop,  below  are  graphs  that  give  typical  performance  of 

ViaLiteHD

 

links.    No  attempt  has  been  made  to  remove  measure  system  noise;  hence  the  results  show  the 
compound measurement system and link performance.   
 
At  both  the  lower  frequency  (10MHz)  and  the  high  frequency  (4GHz)  we  believe  that  a  significant 
noise contribution was made by the measurement system. 
 
 
 

 

 
 

Phase Noise of a ViaLiteHD wideband link measured at 10MHz 

 
 
 
 
 

Содержание ViaLiteHD Blue2 Link

Страница 1: ...de HRX XX 8X 35 XXXXX CR4260 23 10 2019 Pulse Power Measurement Ltd 65 Shrivenham Hundred Business Park Watchfield Swindon Wiltshire SN68TY UK Tel 44 0 1793 784389 Fax 44 0 1793 784391 Email sales via...

Страница 2: ...le mains isolation switch which supplies the equipment ESD Precautions The ViaLiteHD RF Fibre Optic Link is equipped with high frequency active electronics without the correct handing they will be sus...

Страница 3: ...rs 12 2 4 2 Protection of ViaLiteHD equipment from DC pulses 12 2 4 3 Logic interface TTL 5V 12 2 4 4 Logic interface I2C 13 2 4 5 Logic interface Open Drain output 13 2 4 6 Power interface 12V input...

Страница 4: ...k cards mounted in other ViaLite enclosures 33 3 18 2nd Harmonic rejection 34 3 19 Typical system configuration with fixed gain modules 35 3 20 Commissioning of a communications link 35 4 PART NUMBERI...

Страница 5: ...nectors For complete information and product familiarisation this handbook should be read in conjunction with all other relevant handbooks for your ViaLiteHD system 1 2 Blue2 Link ViaLite s RF over fi...

Страница 6: ...to maritime the Blue2 Link is suitable for use in the Broadcast GPS or regular Satcom markets 1 4 Care of fibre optic connectors When the fibre optic cables are not connected it is essential that the...

Страница 7: ...itted with 50 Ohm female SMA connectors The SMA connector is a semi precision sub miniature RF and microwave connector and to maintain performance up to 8GHz ensure that when not in use the supplied R...

Страница 8: ...VIALITEHD BLUE2 LINK HANDBOOK HRX XX 8X 35 XXXXX 8...

Страница 9: ...before every use Optical connectors MUST be cleaned before use even where they have been protected with dust caps A large percentage of performance issues can be attributed to dirty fibres For more de...

Страница 10: ...experienced Warning Never inspect an optical fibre or connector with the naked eye or an instrument unless you are convinced that there is no optical radiation being emitted by the fibre Remove all po...

Страница 11: ...r will automatically disengage Push until a click is heard and the connector locks To disconnect To disconnect depress the lever at the rear of the connector and withdraw the connector The protective...

Страница 12: ...t Please check before connecting your equipment Contact ViaLite Communications for more details 2 4 2 Protection of ViaLiteHD equipment from DC pulses All modules have AC coupled inputs and or outputs...

Страница 13: ...hassis handbook Note When fitted in a chassis or enclosure adjacent to a RF switch or RF splitter card alarm lines maybe loaded and pulled up see chassis handbook 2 4 6 Power interface 12V input Nomin...

Страница 14: ...Maximum RF input power no damage 13 dBm continuous 25 dBm 5 min max Maximum usable input power Gain Setting Dependent 1 dBm to 15 dBm typ Maximum RF output power 15 dBm typ 2 4 10 Optical connections...

Страница 15: ...put from master device 6 LNA_FEED Option for external LNA feed input on Optical TX module Only used if Internal feed is not specified 7 No Connect 8 No Connect 9 No Connect 10 No Connect 11 No Connect...

Страница 16: ...NA_FEED A P7 RX_232_OUT A P8 RX_232_OUT B P9 RX_RF_MON B P10 Pin 10 NC P11 SCL B P12 GROUND 0V P13 SDA B P14 LNA_FEED B P15 RX_ALARM B Blue2Link Loom P 2RF TRX c w I2C 232 73932 15 way D type P1 12V P...

Страница 17: ...XX 8X 35 XXXXX 17 Blue2Link Loom P 2RF TRX RS485 422 232 No I2C 15 way D type 12V TX_ALARM A LD_MON A 422 IN A 422 IN A LNA_FEED A TX_232_IN A RX_232_OUT B BUC_FEED B RTS 485 485 422 OUT B GROUND 0 4...

Страница 18: ...loss is 0 2dB km This can increase if the fibre is under excessive tension compression or is bent into a small radius For clean undamaged single mode connectors optical insertion loss is typically 0...

Страница 19: ...nificantly affected by the gain setting of the attenuators used in ViaLiteHD These have a flat frequency response over the full operating range of the product Figures below are typical L Band HTS modu...

Страница 20: ...s transmitter gain The input P1dB of the link is dependent on the transmitter gain Increasing the transmitter gain will decrease the link input P1dB L band Input P1dB versus Tx gain at Rx gain 20dB In...

Страница 21: ...gain 5dB Wideband input P1dB versus Tx gain at Rx gain 15dB L band output P1dB versus Tx gain at Rx gain 20dB Output P1dB versus TX gain setting 950 1200 1700 2150MHz 6 4 2 0 2 4 6 8 10 12 14 20 18 1...

Страница 22: ...ed by the receiver gain Increasing the receiver gain have little effect on the link input P1dB unless the output of the receiver approaches saturation Figures below are typical L Band HTS modules resp...

Страница 23: ...ain 5dB Wideband input P1dB versus Rx gain at Tx gain 15dB L band output P1dB versus Rx gain at Tx gain 11dB Output P1dB versus RX gain setting 950 1200 1700 2150MHz 6 4 2 0 2 4 6 8 10 12 14 10 12 14...

Страница 24: ...ent on compression of the laser and its associated amplifier that are both situated after the gain control stage in the transmitter At high link gains it is possible to observe some compression in the...

Страница 25: ...etting The noise figure reduces as the transmitter gain is increased The receiver gain only has a minor impact on the link noise figure 3 11 Link IP3 There is a relatively simple relationship between...

Страница 26: ...not have any mixing or frequency conversion in the main RF path but some residual phase noise can be measured This phase noise is introduced by both the RF amplification elements and the laser control...

Страница 27: ...VIALITEHD BLUE2 LINK HANDBOOK HRX XX 8X 35 XXXXX 27 Phase Noise of a ViaLiteHD wideband link measured at 500MHz Phase Noise of a ViaLiteHD wideband link measured at 1000MHz...

Страница 28: ...VIALITEHD BLUE2 LINK HANDBOOK HRX XX 8X 35 XXXXX 28 Phase Noise of a ViaLiteHD wideband link measured at 1500MHz Phase Noise of a ViaLiteHD wideband link measured at 2000MHz...

Страница 29: ...er LMR 500 3 9 ns per meter LMR 600 3 9 ns per meter RG 58 5 1 ns per meter dependent on dielectric RG 59 4 1 ns per meter dependent on dielectric RG 213 5 1 ns per meter RG 316 4 2 ns per meter Delay...

Страница 30: ...and Group delay plot using an Ultra Wideband Tx connected to an Ultra Wideband Rx via a 0 5m fibre 10 4200MHz 3 16 Effects of temperature 3 16 1 Effect of temperature on gain The gain of a ViaLiteHD m...

Страница 31: ...equency Change of transmitter gain at temperature versus frequency 6 4 2 0 2 4 6 30 20 10 0 10 20 30 40 50 60 70 Gain Variation dB Temp degC Link Tx Rx 6 4 2 0 2 4 6 30 20 10 0 10 20 30 40 50 60 70 Ga...

Страница 32: ...ture across an extended temperature range Change of link noise figure at temperature 3 16 3 Effect of temperature on P1dB The link input P1dB will be increased as temperature increases The graph below...

Страница 33: ...proved high frequency isolation 3 17 1 RF isolation Blue link and Yellow link cards mounted in other ViaLite enclosures Other ViaLiteHD enclosures are designed to offer similar isolation Below is a pl...

Страница 34: ...n the following configuration Link Type L Band HTS Device under test HRT L1 8R 33 S1310 HRR L1 8R 03 Link gain Set to default 11 20dB Input Tone 1GHz Optical loss 0dB Harmonic rejection Output power o...

Страница 35: ...in the C band The signal must be conveyed over 1500m of fibre through a bulkhead at each station to the modem An alarm must trigger if the optical path is damaged 1 Install the link connecting all op...

Страница 36: ...RF output from the receiver is correct to within measurement accuracy If the loss is much higher 3dB than calculated the most likely explanation is dirt on the optical connectors If this is the case c...

Страница 37: ...INK HANDBOOK HRX XX 8X 35 XXXXX 37 4 Part numbering 4 1 Part numbering matrix Note Options are dependent on the module type Not all combinations of options are available Contact ViaLite Communications...

Страница 38: ...aks kinks Check all optical connectors are clean Low signal level Gain adjustment set too low RF feed not connected Optical loss too high Incorrect optical connectors Incorrect manual or software gain...

Страница 39: ...FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radi...

Страница 40: ...working hours provided that the Customer will pay at the rates currently charged by ViaLite Communications for any replacements made necessary by accident misuse neglect wilful act or default or any c...

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