GSP-830 User Manual 14 Measurement keys Limit LineMeasTracePeak SearchMarker Marker key (page62) activates markers and places them on specified locations. Peak Search key (page68) searches peak signals and configures peak ranges/orders. Trace key (page73) activates trace signals, configures them, and runs trace math operations. Measurement key (page82) configures and runs 4 types of Power Measurements: ACPR, OCBW, N-dB, and Phase Jitter. Limit Line key (page90) configures high/low limit lines and runs the pass/fail test. Control keys DisplayBWTriggerFile BW key (page95) configures the RBW/VBW width, sweep time length, and waveform averaging number. Trigger key (page103) selects the trigger type, sets the trigger running mode / delay / frequency, and activates the external trigger input. Display key (page107) configures the LCD dimmer, edits and shows the display line and title, and activates split windows. File key (page113) saves/recalls/deletes the trace waveform, limit line, amplitude correction, sequence, and panel settings. Display images may be saved to a storage device via the front panel USB port. State Keys SeqOptionSystemPreset Preset key (page40or123) resets the GSP-830 to a predefined state. System key configures the date/time (page132), GPIB/RS232C interface (page126), and language (page135). It also shows the system information (page128) and self test result (page131), and saves/recalls panel settings (page125). Option key configures the Tracking Generator (page142), Demodulator (page144), battery (page148), and external reference frequency (page133). Seq key (page136) edits and runs sequences (user-defined macro).