INSTRUCTIONS
   MODEL AVX-TD-GIB BIAS INSERTION UNIT
   S.N.
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   1)
   The -GIB suffix denotes a DC current rating of 500 mA (rather than the
   standard 250 mA).
   2)
   The AVX-TD-GIB unit has a parasitic DC resistance of about 16 Ohms in
   the DC to out path and so that DC output voltage is 16 x IDC Volts less

   than the DC voltage applied to the DC port.
   3)
   The AV-1011-C-GIA and the AVX-TD-GIB should be configured as shown
   below.  The applied pulse may be positive or negative and the DC  may
   also be either polarity.
   4)
   The AV-1011-C-GIA includes an “ON-OFF” switch which activates or
   de-activates the short circuit protection feature.  For driving load
   resistances of less than 50 Ohms, the switch must be in the “OFF”
   position.  The unit was shipped with the switch in the “OFF” position.
    The
   switch may be accessed by removing the top cover (by removing the four
   Phillips screws on the top cover and then sliding the top cover back an
   d
   off).
   5)
   The source resistance switch on the AV-1011-C-GIA must be in the 2
   Ohm position when using the AVX-TD-GIB unit.
   6)
   CAUTION:
   a)  The AV-1011-C-GIA may be damaged if operated with a load
   resistance of less than 20 Ohms (if the switch is in the OFF
   position).
   b)  The AVX-TD-GIB will be damaged if the DC current exceeds 500
   mA.
   c)  The output pulse droop will exceed 10% for pulse widths greater
   than 50 ms (for an assumed load resistance of 20 Ohms).  The
   droop will be less for higher load resistances.
   d)  The 50 Ohm cable between the AV-1011C-GIA and the AVX-TD-
   GIB should be less than one meter (for load resistances other than
   50 Ohms).
   7)
   For additional assistance:
   Tel:   (613) 226-5772
   Fax:  (613) 226-2802
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