A front-panel green LED indicates activity. For an application where it is desirable to scan an entire spectrum, an external baseline sweep input is provided via the rear-panel LL REF EXT BNC connector. Printed wiring board jumpers select which of the four channels will use the external baseline sweep. A front-panel push button selects which of the four channels is being read. The digital volt-meter display flashes on overrange.
Specifications apply to each of the four independent channels.
Output occurs as the trailing edge of linear input crosses the LL threshold. Output occurs as the leading edge of linear input crosses the LL threshold. Output occurs as the leading edge of linear input crosses the UL threshold. This control is disabled in the Integral mode. When the LL REF mode jumper is in the EXT position, the control is ineffective.