| SP-12 
                                   		 0.1 pf input capacitance     1.0 megohm input resistance     0.8 ns rise / fall time     dc to 500 MHz bandwidth     0.5% linearity     -10V to +20V voltage range     +3% gain accuracy     signal attenuation of 10 to 1 (high impedance) or 20 to 1 (50 ohm input)
 | SP-18 
                                            0.02 pf input capacitance     10-14 A input leakage     1.2 ns rise / fall time     dc to 350 MHz frequency response     0 to +15 volts operating range     0.2% linearity-5V range     2.0% linearity-15V range     +5% gain accuracy     signal attenuation of 10 to 1 (high impedance) or 20 to 1 (50 ohm input)
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                                     | SP-19 
                                                0.02 pf input capacitance     10-14 A input leakage     1.2 ns rise / fall time     dc to 350 MHz frequency response     7V to +8V operating range     0.2% linearity-5V range     2.0% linearity-15V range     +5% gain accuracy     signal attenuation of 10 to 1 (high impedance) or 20 to 1 (50 ohm input)
 | SP-28 
                                            SP-28     0.04 pf input capacitance     10-14 A input leakage     rise / fall time = 350 ps + volt pulse of less     dc to 1 GHz frequency response     -3V to +10V operating range     linearity: 0.5% -1V to +4V range     2.0% -3V to +10V range     signal attenuation 20 to 1 (50 ohm input)  | 
                                   
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                                     | SP-29 
                                                 0.04 pf input capacitance     10-14 A input leakage     rise / fall time = 350 ps + volt pulse of less     dc to 1 GHz frequency response -3db     -7V to +6V operating range     linearity: 0.5% (-2V to +2V range     2.0% (-7V to +6V range     signal attenuation 20 to 1 (50 ohm input)  | SP-34 
                                                0.1 pf input capacitance     10 megohm input resistance     DC to 3 GHz     -7 to +10V operating range  |