Tektronix 071-0590-00 user manual Function Soft Keys F1, F2, F3, and F4, Analyzer Inputs

Functional Overview

Function (Soft) Keys (F1, F2, F3, and F4)

Menu Functions: The primary use of the function keys in the Generator and Analyzer is to access and navigate each instrument's menu system. F1 may be thought of as the main menu key. Pressing F1 will display the instrument's first level menu. Once inside the menu system, you may use the F1, F2, F3, and F4 keys to select different menus, or to make choices within a selected menu. Note that pressing the F1 key enough times will always get you out of the system. See Chapter 3 - Reference for an explanation of each Generator and Analyzer menu.

Analyzer Inputs

These function keys provide signal inputs and control of parameters (Input Termination, Threshold, Logic Polarity and Data/Clock Phase Delay) for DATA, Ref DATA, and CLOCK.

Selecting DELAY, V-TERM or V-THRS permits the INPUT Up/Down keys to vary the Input parameters for DATA, as described below. Holding the Up/Down key repeats the function five times a second.

Function key F2 (CLOCK) permits the V-TERM key to vary only the Input termination parameters for CLOCK.

Function key F3 (Ref DATA) permits the DELAY, V-THRS, and V-TERM keys to vary the Input parameters for Reference DATA.

DELAY - Pressing DELAY selects Input Data Delay adjust mode. The Input Data signal can be delayed over the range 0.0 nS to 3.9 nS in sub-nanosecond steps. The delay is modified with the INPUT Up/Down keys. The current Delay is displayed on the lower left side of the LCD.

An illuminated Delay LED light indicates that the unit's DELAY can be modified by the Up/Down arrow keys.

V-TERM- Pressing V-TERM selects V-termination mode. The input termination voltage for Input Data is selectable between GND, -2.0V, and AC. -2.0V mode provides active termination for ECL and GaAs signals. AC mode allows RF termination.

An illuminated V-TERM LED light indicates that the input termination can be modified by the Up/Down arrow keys.

V-THRS- Pressing V-THRS selects V-Threshold mode. The Input Data threshold is variable over the range of -1.5V to +1V in 50 mV steps. The currently selected threshold voltage is displayed in the lower right side of the LCD display.

An illuminated V-THRS LED light indicates that the threshold voltage can be modified by the Up/Down arrow keys.

The Data threshold voltage is available at the Analyzer rear panel SMA jack labeled DATA THRESHOLD.

Print Setup Function (Analyzer only): You can print a report showing the current setup of the Analyzer by pressing the F4 key. This function, however, is not active in the menu mode.

GB1400 User Manual 2-21