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  4. A5-12
  5. Operation & Service Manual

Quartzlock A5-12 Operation & Service Manual

Manual is about: 12 Way Distribution Amplifier

Summary of A5-12

  • Page 1

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 1 a5-12 12 way distribution amplifier operation & service manual.

  • Page 2: Contents

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 2 contents 1 safety considerations.......................................................3 1.1 general ......................................................................3 1.1.1 before applying power .......................

  • Page 3: 1 Safety

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 3 1 safety considerations 1.1 general this product and related documentation must be reviewed for familiarisation before operation. If the equipment is used in a manner not specified by the manufacturer, the protection prov...

  • Page 4: 1.3.1

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 4 warning instructions for adjustments when covers are removed and for servicing are for use by service-trained personnel only. To avoid dangerous electrical shock, do not perform such adjustments or servicing unless qualif...

  • Page 5: 1.3.2

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 5 1.3.2 magnetic field sensitivity ≤2x10 -11 / gauss atmospheric pressure -60m to 4000m -13 / mbar 1.4 replaceable fusing characteristics 800ma time-lag hbc 1.5 cleaning instructions to ensure long and trouble operation, ke...

  • Page 6: 2 Operating

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 6 2 operating procedure 2.1 introduction the quartzlock model a5-12 is a linear distribution amplifier designed for standard frequency distribution between 1 mhz and 100 mhz. The circuit is based on a number of balanced lin...

  • Page 7: 3 Circuit

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 7 3 circuit descriptions 3.1 output amplifier the output amplifier is a differential amplifier based on a common emitter, common base, and common collector cascade circuit. Tr7 and tr8 are the common emitter input stages. T...

  • Page 8

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 8 the input amplifier is very similar to an output amplifier module, except variable gain is provided. The gain control is vr1, which varies the transconductance of tr6 and tr7. C12 provides high frequency compensation. The...

  • Page 9: 4 Performance

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 9 4 performance verification 4.1 equipment required a) spectrum analyser and tracking generator, 1 mhz to 100 mhz. B) sine wave signal generator or function generator, 10 mhz c) rf power meter d) low pass filter, mini-circu...

  • Page 10: 4.2.4

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 10 measure the output isolation at 10 mhz and 100 mhz. Note that it may be necessary to fit ferrite sleeves to the spectrum analyser and/or tracking generator cables to avoid common mode cross talk. The output-to-output iso...

  • Page 11: 4.2.9

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 11 1. Remove the lid. 2. Connect desired input between 0 and 13 dbm. 3. Connect a spectrum analyser, oscilloscope with 50 Ω input impedance, or rf power meter to any output. 4. Adjust output level to 13dbm (1v rms) using th...

  • Page 12: 5 Specification

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 12 5 specification input characteristics no of inputs 1 impedance 50 Ω nominal level 0dbm to +13dbm adjustable, sine wave input swr output characteristics no of outputs 12 impedance 50 Ω nominal level +13dbm nominal into 50...

  • Page 13

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 13 broadband noise delay match between outputs 1ns temperature stability of delay 10ps/°c phase change at output due to open or short at any other output (calculated from isolation): *spurious outputs are exclusively from t...

  • Page 14

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 14.

  • Page 15

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 15.

  • Page 16

    Model a5 -12 operation & service manual a5-12 manual a5 21 january 2005 page 16.