Tektronix 1740A Series, User Manual

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Performance Verification
4–20
1740A/1750A/1760 – Series Service Manual
REV OCT 1994
h. Check – that the signal amplitude is 100 IRE 2 IRE (700 mV
14 mV PAL) while varying the leveled sine wave generator frequency
from 1.0 to 10.0 MHz.
i. Remove the Peak-to-Peak Detector Head from the CH-A INPUT and
terminate the loop-through in 75
.
j. Set the sine wave generator frequency to 1 MHz.
k. Enter the GAIN menu and select X5. If desired, press the CLEAR
MENU button to remove the readout.
l. Adjust the sine wave generator amplitude for a 100 IRE (700 mV PAL)
signal on the 1740A/1750A/1760–Series.
m. Check – that the signal amplitude is 100 IRE 4 IRE (700 mV
28 mV PAL) while varying the leveled sine wave generator frequency
from 1.0 to 10.0 MHz.
n. Enter the GAIN menu and select X10. If desired, press the CLEAR
MENU button to remove the readout.
o. Adjust the sine wave generator amplitude for a 100 IRE (700 mV PAL)
signal on the 1740A/1750A/1760–Series.
p. Check – that the signal amplitude is 100 IRE 4 IRE (700 mV
28 mV PAL) while varying the leveled sine wave generator frequency
from 1.0 to 10.0 MHz.
q. Enter the GAIN menu and select X1. Exit the GAIN menu.
r. Repeat parts b. through h. for CH-A1, CH-A2, CH-A3, CH-B, CH-B1,
CH-B2, and CH-B3 by moving the leveled sine wave generator output
and terminator to each of the respective INPUTs.
s. Select INT REF.
t. Disconnect the leveled sine wave generator and terminator from the
1740A/1750A/1760–Series.
13. Luminance Filter Gain and Frequency Response
Requirement – Gain: 1%. Frequency Response: 3 dB attenuation at
1 MHz. 40 dB attenuation at F
SC.
Chrominance Rejection
(1745A-1755A-1765 only) 34 dB.
a. Connect the function generator output to the CH-A INPUT, then
terminate the loop-through in 75 . Select CH-A INPUT.
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