Tektronix 1740A/1750A - Manual (Page 77)

Using the Menus
1740A/1750A Series Waveform/Vector Monitor User Manual
3-22
Additional choices appear when CAL SIG or GAIN CAL is
turned on:
CAL SIG ON
H In 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).
H In 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).
H In 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
H In 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 VCAL cancels any vertical gain adjust-
ments; the instrument returns to the factory cali-
brated gain settings.
H In 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.