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M mode 4B mode Figure 3-6. Five display modes sketch Adjusting keys Adjusting keys are used to adjust focus position, dynamic range, scanning angle, zoom, cine loop See” Chapter 4 Operation Procedures”) Focus number selection Press this key to lighten up the “ focus number” on the screen right top, press again to change the focus numbers. There are two focus at most. Press this key to switch between one focus to two. Focus space selection When set the focus number as two, their distance can be adjusted. There are 5 levels focus space 2, 3, 4, 5, 6 and press this key repeatedly to switch among them circularly. Scan angle selection key Press this key to lighten up the “Angle” on the up right screen , press or to change the scanning angles. The angel range is 50%-100%. Tips: When linear probe or rectal linear probe is used, this function can not be used. the angle can improve the image’s frame rate and increase the cine loop frames Reduce Dynamic range adjusting key Press this key to lighten up “DR” on the screen top right corner. Press or key to adjust the dynamic range between 100dB-131dB. 118 dB is recommended. Depth Adjusting key Press or keys to adjust scan depth between 40mm-240mm. The current depth displays at bootom screen (see figure 3-1). The depth adjusting range of each probe is given below: Probe mode Depth range(mm) 60R/3.5MHz Convex probe 70~240 7.5 MHz Endo-rectal probe 7.5MHz HF linear probe 40~90 20R/5.0MHz Micro convex probe 80~150 Table 3-1. Probes and their depth adjusting range 19 13R/6.5MHz Endo-cavity probe 50~120