Tektronix 1730 Series, Instruction Manual

Page: 154 / 258

1730–Series Checks and Adjustments
5–38
i. Connect the output of the leveled sine wave generator to the CH–A and
CH–B INPUTS, using a precision 50
W
cable, a 50–75
W
minimum loss
attenuator, a 75
W
feed through attenuator, and the dual input coupler.
j. Set the leveled sine wave generator Frequency to 50 kHz and adjust its
Amplitude for a 100 IRE (NTSC or PAL–M) or 700 mV (PAL) output as
displayed on the 1730-Series.
k. Set the leveled sine wave generator Frequency to 6 MHz.
l. ADJUST – C195 (CH–A Comp) for 100 IRE (NTSC and PAL–M) or
for 700 mV (PAL).
m. Set the leveled sine wave generator Frequency to 3.58 MHz (NTSC or
PAL–M) or 4.43 (PAL) and check for 100 IRE or 700 mV
±
2% (2 IRE
or 14 mV). Check both frequencies for the 1735.
n. If not in specification at 3.58 or 4.43 MHz, repeat parts e. through g. of
this step (as set up by parts a. and b.).
17. Adjust Channel–B Input Compensation
a. Make sure the 1730–Series INPUT is in BOTH (CH–A and CH–B
indicators lit).
b. Select 2LINE SWEEP.
c. Set the leveled sine wave generator Frequency to 6 MHz.
d. ADJUST – C696 (CH–B Comp) to overlay the CH–A display with the
CH–B display.
e. Set the leveled sine wave generator Frequency to 3.58 MHz (NTSC or
PAL–M) or 4.43 (PAL) and check for 100 IRE or 700 mV
±
2% (2 IRE
or 14 mV). Check both frequencies for the 1735.
18. Adjust X5 Gain HF Resposnse
a. Select the CH–A INPUT.
b. Select X5 VERTICAL GAIN.
c. Set the sine wave generator for 50 kHz.
d. Select CH–A INPUT, EXT REF, and 1LINE SWEEP.
e. Adjust the sine wave generator for a displayed amplitude of 100 IRE (or
700 mV).