Tektronix 1740A/1750A or to, Dual-stan, CAL SIG ON, GAIN CAL ON, frequency to, Using the Menus, NTSC FSC (3.58 MHz) or PAL FSC (4.43 MHz)

Using the Menus

Additional choices appear when CAL SIG or GAIN CAL is turned on:CAL SIG ONHIn waveform mode, the user can set the calibrator

frequency to 100 KHZ or to FSC OSC (FSC OSC = 3.58 MHz for NTSC/4.43 MHz for PAL). Dual-stan-

dard monitors also have the option of choosing NTSC FSC (3.58 MHz) or PAL FSC (4.43 MHz).

HIn vector mode, the user can set the calibrator frequency, for dual-standard instruments only, to

NTSC FSC (3.58 MHz) or PAL FSC (4.43 MHz).

HIn both waveform and vector modes, selecting NTSC FSC or PAL FSC temporarily switches the instrument to the appropriate video standard. The standard is restored when changing the selection or when exiting the CALIBRATE menu.

GAIN CAL ON

HIn waveform mode, the left bezel control adjusts instrument vertical gain (V CAL) and the center bezel control adjusts instrument horizontal gain (H CAL).

Once gain has been adjusted, two reset options appear on screen. If either of these resets is se- lected, a box flashes momentarily around the on- screen label to acknowledge that reset has occurred. RESET VCAL cancels any vertical gain adjustments and RESET VCALcancels any vertical gain adjust- ments; the instrument returns to the factory cali- brated gain settings.

HIn vector mode, the center bezel control adjusts the vector signal gain. Once gain has been adjusted, RESET VCAL appears on screen. Selecting RESET VCAL cancels any vector gain adjustments and returns the instrument to the factory calibrated gain settings.

3-22 1740A/1750A Series Waveform/Vector Monitor User Manual