Sencore PS163 - WAVE FORM PHOTOGRAPH; DETECTOR PROBE (OPTIONAL)

the adjacent channel sound carrier (47.25MHz) are
on the base line indicating proper trap action 41.67
MHz and 42.67MHz mark the limit of the receivers
color response. Note that 41.67MHz, 42.17MHz and
42.67MHz form a straight line, with equal spacing be-
tween the markers.
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3975 25
Fig. 22. Ideal IF response curve of color
receiver.
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Fig. 23. Ideal chroma response curve.
Fig. 23 shows the ideal response of the chroma band-
pass amplifiers in a modern color receiver. This curve
was obtained using a Sencore SM1 52 sweep and marker
generator, and injecting a VSM signal into the mixer
stage of the tuner. 3.08MHz and 4.08MHz mark the
limits of the receivers’ color response, and they
should fall at the 80% points on the curve as shown.
The color carrier 3.58MHz is shown properly centered
on the top of the response curve. The sound carrier
(4.5MHz) is on the base line, indicating proper trap
action.
WAVE FORM PHOTOGRAPH
The bezel hold down bolts have the correct diameter,
thread pitch, and spacing to mount directly the Tek-
tronix type C-27 Camera Bezel, as used on Tektronix
500 series oscilloscopes. The correct camera settings,
when using ASA3000 Polaroid film, to properly ex-
pose the grid lines are f 5.6 at 1/5 sec. The PS163
INTENSITY control should be adjusted so that the
waveform is approximately twice as bright as the grid
lines when viewed with the naked eye.
DETECTOR PROBE
(OPTIONAL)
The Sencore 39G35 extends the range of the PS163
to frequencies in excess of 200MHz. The most com-
mon use of this probe is to detect the presence o
amplitude modulation of an RF carrier, such as
trouble shooting the IF amplifiers of a TV receiver.
The .005 volt per division sensitivity of the PS163
coupled with the voltage doubler action of the 39G35
detector probe allows the observation of signals all
the way back to the output of the tuner. This probe
can also be used to make relative measurements of a
CW RF carrier. Use the PS163 DC COUPLED to
measure the DC voltage from the probe. This DC
voltage is directly proportional to the level of the RF
carrier.
SERVICE AND WARRANTY
You have just purchased one of the finest oscilloscopes available on the market today.
The PS163 has been inspected and tested twice at the factory. It has also passed a rugged
use test by a Field Engineer in our Zero Defects test area.
If something should happen, the PS163 is covered by a standard 90 day warranty as ex-
plained by the warranty policy enclosed with your instrument. For best service on
warranty work, return the PS163 directly to our Factory Service Division. Be sure to
state the nature of the defect to assure rapid return to you.
If you wish to maintain your own 25163, we have enclosed a schematic, parts list and
trouble chart. Any parts needed may be ordered directly from the Factory Service
Division.
We reserve the right to examine defective components before an in-warranty replacement
part is issued.
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Form 650 Printed in USA