HM 1005 The 100 MHz Standard for professionals The HM 1005 is a multi-function oscilloscope loaded with features such as true 3-channel operation, a genuine second time base, and even a separate second trigger facility. Up to 6 traces can be displayed for evaluating waveform relationships by using the alternating time base mode and all three input channels. In this configuration, the normal signal is displayed together with the expanded signal section. The second trigger facility, with its own separate slope and level control, provides for the stable viewing of normally troublesome asynchronous signal components. The main time base trigger circuit is designed to provide reliable triggering to greater than 130 MHz, at signal levels as low as 1 division. A user-selectable x10 magnifier extends the maximum sweep range to 5 ns/division. An active TV Sync Separator extracts clean field and line sync, pulses to ensure a high degree of display stability when viewing composite video signals. The built-in delay line permits viewing of the trigger edge at all times. The overscan feature indicates if any part of the trace passes beyond the vertical limits of the CRT screen. An analog Y-output, switchable to Channel I or II, allows further external processing of the signal. Another new feature on the HM 1005 is the easy-to-read 3-digit LED delay time multiplier for accurate measurements. As is the case with several HAMEG oscilloscopes, the HM 1005 also has a built-in switchable 1 kHz /1 MHz Calibrator with a sharp <5 ns risetime output. This feature is necessary in high bandwidth oscilloscopes so that the probes can be correctly matched and compensated to ensure faithful reproduction of the input signals. This is especially true when viewing pulses and other high frequency signals. The calibrator is also useful for performing checks of the instrument's transient response characteristics from probe tip to CRT screen The HM1005 offers the right combination of triggering control, frequency response and time base versatility, to facilitate measurements in every environment from the laboratory to field service. It is yet another example of HAMEG's dedication to engineering excellence.