The 8112A is a fully programmable 50 MHz pulse generator with 5 ns transitions and 32 V p-p (into open circuit) max output amplitude. All pulse parameters are variable including delay and double pulse spacing. Besides the comprehensive trigger modes, external modulation capabilities extend applicability; upper level, width, period and delay-modulated signals are available. These can be combined with the trigger modes so that complex real-life signals like modulated bursts are simulated easily.

Step response and trigger hysteresis measurements require fast transitions or sawtooth signals as obtained in the HP 8112A's linear transition mode-either fixed 5 ns or variable fro 6.5 ns. The new cosine transitions, also variable from 6.5 ns, mean that band-filtered signals are now just as simple to obtain.

Sensitive devices are protected by programming output limits and the upper level can be controlled by the device supply. Also, constant energy or constant width can be programmed.
Dual channel operation is feasible by operating HP 8112A's in a master/slave combination. For simple operation a green button gives error-free settings. A new softkey operating concept plus detailed error recognition make the HP 8112A's powerful versatility easy to handle.

• The item is in good condition, tested and working. Powers up without errors but the output has is noisy and unstable. The oscilloscope shown in the photos is not included in the sale.