1.12
l. RF-IF-VIDEO ATTENUATOR - Provides
continuous output level adjustment of all
outputs.
m. PROBES Selector Switch
- Selects either
the Direct probe or the Demodulator
probe.
n. POWER ON/OFF Switch
ADDITIONAL FEATURES
1.12.1 Unity gain through instrument into oscillo-
scope to eliminate intermediate connecting
steps for calibration purposes.
1.12.2 15,750 Hz Filter enables user to view 1-F and
chroma response curves without disabling
the horizontal output stage of the receiver
under test. The response curves can then be
viewed
with no objectionable "grass" from
the television receiver superimposed on the
oscilloscope patterns.
1.12.3 Built-in Low Frequency Compensation to
eliminate pattern tilt errors resulting from use
of an oscilloscope with poor low-frequency
response (internal adjustment).
1.12.4 Marker lights are provided on the front panel
to indicate when specific markers are being
used. In addition, the lights are located on
idealized response curves to indicate the de-
sired position of the markers. This
is a built-
in reference for the operator.
8
1.12.5 The horizontal sweep is synchronized to the
power line frequency (60 Hz).
1.12.6 100 per cent solid state circuitry
for zero
warm-up time and maximum stability and
reliability.
1.12.7 All internal voltages are regulated for max-
imum stability and immunity to line voltage
fluctuations.
1.12.8 All accessories required for connection of
Model 415 to oscilloscope and receiver under
test are furnished. These include:
R-F cable with built-in d-c blocking and
terminations (75 or 300 ohms).
PR-151 Demodulator Probe
for all video,
chroma, i-f and r-f demodulation require-
ments.
Direct cable with built-in
lOK ohm isolating
resistor.
Two
i-f load blocks for tuner link adjust-
ment.
All shielded cables for connection to the
oscilloscope.
Three bias leads.
One ground cable.
All accessories are illustrated in Figure 1.1.
..
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