Mobile digital radios supplier Sepura has fallen back to day after it reduced its revenue guidance. Sepura expects to generate revenue in the low-to-mid £70ms in the year to March 2011. This is down to delayed orders from Germany and an Asian country. Gross margin is modestly ahead of expectations. The delayed orders should help next year's figures. HiWave Technologies, the audio technology developer formerly known as NXT, has risen in price today but this seems to be a function of a widening of the bid/off spread. There were 10 deals this morning and all of them were sales. However, the bid/offer spread moved from 3.5p/3.75p to 3.5p/4.45p, which had the effect of increasing the share price by almost 10%. FTSE TechMARK - Risers Hiwave Technologies (HIW) 3.98p +9.50%Asterand (ATD) 19.00p +5.56%Oxford Biomedica (OXB) 6.30p +3.62%Wolfson Microelectronics (WLF) 310.50p +2.73%Pace (PIC) 223.10p +2.39%ARM Holdings (ARM) 625.00p +2.29%Vectura Group (VEC) 79.16p +2.14%KCOM Group (KCOM) 59.00p +1.72%Oxford Instruments (OXIG) 623.00p +1.47%Kewill (KWL) 90.75p +1.40%FTSE TechMARK - Fallers Phoenix IT Group (PNX) 255.00p -10.37%Sepura (SEPU) 44.75p -7.73%Ark Therapeutics Group (AKT) 4.70p -5.62%AEA Technology Group (AAT) 5.00p -4.76%Renovo Group (RNVO) 16.50p -2.94%Kofax (KFX) 500.50p -2.82%Fidessa Group (FDSA) 1,665.00p -2.06%Imagination Technologies Group (IMG) 342.30p -2.06%Micro Focus International Plc (MCRO) 400.30p -2.03%E2V Technologies (E2V) 116.00p -1.90%