The pulsed nature of the ISIS beam is advantageous for many types of experiments. Limitations arise, however, because the finite width of the muon pulse restricts the maximum muon precession frequency and relaxation rate that can be measured. This paper considers two methods currently under development at ISIS that can be used to extend the upper frequency limit at a pulsed muon source. Firstly, a technique using a fast switching electrostatic kicker to time slice the incoming muon pulse is described. Data is presented that demonstrates the effective manner in which the μSR usable frequency response at ISIS is increased in inverse proportion to the pulse width. The second technique uses a 90 o radio-frequency (RF) pulse to remove the time structure of the pulsed beam; this method is demonstrated by studying the flux penetration in the mixed state in the type II superconductor YNi 2 B 2 C. The merits of both techniques are considered and contrasted.