| Model | 
TLFG | 
LC 40 | 
1794 | 
1790 | 
1692 | 
1690 | 
1689 | 
1688A | 
1686A |
| Description | Function Generator Test Leads Set | Function Generator Case, 12 x 11 x 5.5 inches | DC Power Supply, Single Output, 0-32V, 0-30A, Digital Display | DC Power Supply, Single Output, 0-32V, 0-20A, Digital Display | DC Power Supply, Switch Mode, Single Output, 3-15V, 40A, Digital Display | DC Power Supply, Single Output, 1-15V, 28A, Digital Display | DC Power Supply, Single Output, 1-15V, 28A, Analog Display | DC Power Supply, 3-14V, 4.5-20A, Dual Analog Display | DC Power Supply, 3-14V, 2.5-12A, Dual Analog Display |
| Output (Volts) | | | 0-32V | 0-32V | 3-15V or 13.8V fixed | 1-15V | 1-15V | 3-14V | 3-14V |
| Output (Amps) | | | 0-30A | 0-20A | 40A | 28A | 28A | 4.5-20A | 2.5-12A |
| Ripple & Noise | | | 1mVrms | <= 1mVrms | <= 10mVrms | 5mV | 5mV | <= 10mVrms | <= 10mVrms |
| Metering | | | Dual Digital | Single Digital | Dual Digital | Dual Digital | Dual Analog | Dual Analog | Dual Analog |
| Manufacturer's Warranty | 1-year | 1-year | 2-year | 2-year | 1-year | 1-year | 1-year | 1-year | 1-year |