MODEL 275 The Wavetek 275 Programmable Arbitrary/Function Generator produces sine, triangle and square waveforms as well as user-defined arbitrary waveshapes. Any of the waveforms can be generated in the continuous, triggered, gated or burst modes. External width and dc functions are also provided. Data entry is from the front panel or GPIB (IEEE 488-1978). Numeric input is entered in free format: fixed, floating, or exponential notation. Parameters may be entered in any order, internally, all entries are interactively checked for errors and displayed on the front panel, or they may be accessed through the GPIB. Arbitrary waveform amplitude resolution is 12 bits. Horizontal resolution is 2048 points (standard), expandable to 8192 points (optional). Arbitrary waveform clock period is programmable within the range of 267 ns to 267 s per point with 0.2% accuracy. Non-arbitrary waveform frequency range is 0.01 Hz to 12 MHz. Output levei is specified from 10 mV to 10 Vp-p into a 50fi termination and 20 mV to 20 Vp-p into an open circuit with 3 digits of resolution. Offset can be programmed to vary the waveform base line up to ±10V, or in the dc function, to vary the dc output. All inputs and outputs are protected against short circuits and excessive voltages between ±15V. The function output is further protected against voltage inputs up to 140 Vac or ±200 Vdc. Activation of the protection circuits will cause a front panel error message and may cause a GPiB service request. Up to 75 sets of complete front panel settings can be stored in memory. The memory has a non-rechargeable lithium battery back up for a minimum of 6 months (typically 1 to 2 years). A “low battery” warning will be indicated on the display when the battery voltage drops to 80% of its normal voltage.