INSTRUCTIONS
   MODEL AVO-8B-C PULSE GENERATOR

   S.N.:
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   WARRANTY
   Avtech Electrosystems Ltd. warrants products of its   manufacture to be
    free
   from defects in material and workmanship under conditions of normal use
   . If,
   within one  year  after delivery to the original owner, and after prepa
   id  return
   by the original owner, this Avtech product is found to   be defective,
   Avtech
   shall at its option repair or replace  said defective item. This warran
   ty does not
   apply   to   units     which   have   been   dissembled,   modified   o
   r   subjected   to
   conditions exceeding the applicable specifications or ratings.  This wa
   rranty is
   the extent of the obligation assumed by Avtech with respect to this pro
   duct
   and no other warranty or guarantee is either expressed or implied.
   TECHNICAL SUPPORT
   Phone:  613-226-5772 or 1-800-265-6681
   Fax:  613-226-2802 or 1-800-561-1970
   E-mail:  info@avtechpulse.com
   World Wide Web:  http://www.avtechpulse.com
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   TABLE OF CONTENTS
   WARRANTY...............................................................
   .................................
   TABLE OF CONTENTS......................................................
   ........................
   FIG. 1:  PULSE GENERATOR TEST ARRANGEMENT.............................
   GENERAL OPERATING INSTRUCTIONS.........................................
   ........
   PERFORMANCE CHECK SHEET................................................
   ..............
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   FIG. 1:  PULSE GENERATOR TEST ARRANGEMENT
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   GENERAL OPERATING INSTRUCTIONS
   1)
   The     bandwidth   capability   of     components   and   instruments
       used     to
   display  the  pulse  generator  output  signal  (attenuators,  cables,
   connectors,  etc.) should exceed  several gigahertz.
   2)
   The use of a 40 db attenuation will insure  a peak input              s
   ignal to
   the sampling scope of less than one volt.
   3)
   In general,  the pulse  generator trigger  delay control
    should  be
   set  in the  100 nsec  range.  Other settings                should be
    as
   shown   in the   above diagram.     The Avtech
         pulse
   generator output  is delayed  with respect to the                trigge
   r
   input signal by about 50 nsec.  (typically).
   4)
   The Model AVI output pulse width is a linear function of
    the length
   of  open circuited coaxial cable connected to                the "PW"
   port (see Fig.  1).  The open  circuited delay                line  sho
   uld be
   formed from  high-quality semi-rigid 50                ohm  coaxial  ca
   ble
   (eg.  0.085  inch   copper  50  ohm                semi-rigid).  Miniat
   ure
   flexible coaxial cable  such as                RG 173 may  be used but
   will result in  a degraded fall                time.  In the absence of
    an
   external  cable connected to                the tune port, Model AVI-MP

   outputs an impulse  of pulse                width less than 1.0 nsec.
   5)
   The minimum pulse repitition frequency period is related
    to the
   delay line cable length (or pulse width) as shown                in  Fi
   g. 2.
   If the PRF  period for a given cable length                is less  tha
   n that
   specified in Fig. 2, the output pulse                amplitude  will  b
   e  less
   than  the specified value and                prolonged operation  in th
   is
   mode could result in damage                to  the  unit.   Therefore,

   operation   in or beyond the                               shaded regio
   n should be
   avoided.
   6)
   The Model AVI pulse generator can  withstand an infinite
    VSWR
   on the output port.
   7)
   The  output amplitude is controlled  by the one turn AMP
    control.
   For  output amplitudes less than 20 volts, the                AMP  H  L

   switch   should   be   set   in the L position to
            eliminate
   transient  follow-on  pulses  after  the main                output  pu
   lse.
   For  output  amplitudes greater than 20                volts,  the AMP
   H L
   switch  should be in the H position.                 (-MP units do not
   include an AMP control).
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   8)
   To   DC   offset   the   output   pulse   connect   a   DC     power
   supply
   set   to     the   required     DC   offset     value   to     the   te
   rminals
   marked   O.S.     The   maximum   attainable   DC   offset   voltage
   is
   + 50 volts (option).
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   PERFORMANCE CHECK SHEET
     __________________________________________________________________
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                                Document Outline

     * [1]WARRANTY
     * [2]TABLE OF CONTENTS
     * [3]FIG. 1: PULSE GENERATOR TEST ARRANGEMENT
     * [4]GENERAL OPERATING INSTRUCTIONS
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References

   1. file:///root/tmp.html#2
   2. file:///root/tmp.html#4
   3. file:///root/tmp.html#5
   4. file:///root/tmp.html#6