The 1720 is a half-rack width NTSC Vectorscope designed for television signal monitoring applications. When used in tandem with the companion 1730 Waveform Monitor, automatic tracking of selected lines in a frame and store/recall of setups is available. The 1720 has dual-channel capability permiting simultaneous display and parallax-free internal graticules for precise evaluation. The vector display has 2 degree differential phase and 5% gain scale markings. An additional X-Y mode scale can be used for gain and phase measurements of stereo audio signals.