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Summary of Contents for Retroaktiv SSH
- Page 1 COMPLEX SAMPLE & HOLD OPERATION MANUAL...
- Page 2 : Sets slew amount • (Slew): Attenuates SLEW input signal • : Sets the shape of the slewing effect • (SLOPE): Attenuates SLOPE input signal Figure 1- SSH Front Panel • Indicates rate of internal S&H clock SSH Users Manual...
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Page 3: Internal Clock
INTERNAL CLOCK Figure 2 - SSH Block Diagram INTERNAL CLOCK The built-in clock generator determines the interval at which the sample and hold generator samples incoming signals. The clock ranges from about .25Hz to 100Hz. The minimum rate of the clock can be set by the MIN RATE trimmer located on the rear of the module. -
Page 4: Sample & Hold
SLEW LIMITER & WAVESHAPING CIRCUIT The SSH contains a complex slew limiter circuit which is used to limit the rate at which the staircase waveform can change. By adding slew, a sharp edged staircase waveform becomes rounded as the slew effect limits the rate at which the voltage can change. - Page 5 SLEW LIMITER & WAVESHAPING CIRCUIT Figure 4 - Staircase with no slew applied Figure 5- Staircase with 30% slew applied, linear slope Figure 6- Staircase with 30% slew applied, exponential slope SSH Users Manual...
- Page 6 RISE. To enable SLEW only when the wave- form is falling, set the switch for FALL. Figure 7 illustrates the function of the RISE/FALL switch. Figure 7 - RISE/FALL switch function (Linear slope) SSH Users Manual...
- Page 7 SLEW LIMITER & WAVESHAPING CIRCUIT Figure 8 - RISE/FALL switch function (EXP slope) SSH Users Manual...
- Page 8 Figure 9- Slope knob function (ASM mode) ASM mode allows the slewed S&H waveform to have a different slew shape on rising steps and falling steps. Figure 10 illustrates how the slew/slope is applied in ASM mode. SSH Users Manual...
- Page 9 SLEW LIMITER & WAVESHAPING CIRCUIT Figure 10- Slope knob function (ASM mode) SSH Users Manual...
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Page 10: Trim Procedure
5 seconds.) SLOPE CIRCUIT TRIM • It is recommended that an oscilloscope be used to monitor the SSH output signals when trimming the SLOPE circuit. This can be done by ear as well, but it can take more work. - Page 11 BUILD NOTES BUILD NOTES This section is for people building the SSH DIY kits. Read this section before building an SSH kit. • Populate 0603 resistors and capacitors, 3904, 3906, 2N7002, BC847, BC857, BAV99 first. Clean all flux from PCB. Then populate ICs, headers, electrolytic caps, and through hole film caps, being careful to clean any remaining flux.
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