the 81610a retur lo meter i ideal for maki g mea ureme t o fa t telecommu icatio y tem , uch a filter , multi lexer , cro -co ect , am lifier , a d whole y tem u der te t. it ca al o e de loyed i r am d, roductio e viro me t , a d i glemode a licatio .thi u it ha the followi g ecificatio : ource: exter al i ut o ly e or eleme t: i gaa wavele gth ra ge: 1250 - 1640 mdy amic ra ge: 70 d exter al i ut/out ut ower:max i ut ower: + 10 d mmi i ut ower: 0 d mdamage i ut ower: + 16 d m