The 802.16‑2004 standard specifies Cyclic Prefix (CP) ratios 1⁄4, 1⁄8, 1⁄16, or 1⁄32. A specific CP ratio can be set manually. The instrument offers support for the following ratios: 1⁄4, 1⁄8, 1⁄16, 1⁄32.
To set the CP ratio:
1. Press the Setup main menu key.
2. Press the CP Ratio (G) submenu key to display the available ratios: 1⁄4, 1⁄8, 1⁄16, 1⁄32.
3. Use the Up/Down arrow keys or the rotary knob to highlight the applicable ratio, and press the Enter key to set the ratio. The selected ratio is displayed in the user settable parameters to the left of the display.
Span Setup
To set the span for Spectrum View:
1. Press the Setup main menu key.
2. Press the Span submenu key to display the available spans: 5 MHz, 10 MHz, 20 MHZ, 30 MHz.
3. Use the Up/Down arrow keys or the rotary knob to highlight the applicable span on the list, and press the Enter key to set the span.
Frame Length Setup
To set the frame length:
1. Press the Setup main menu key.
2. Press the Frame Length submenu key to toggle through the available frame length selections: 2.5 ms, 5 ms, 10 ms.