B&K 1076, Инструкция по эксплуатации

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CONTROLS: WHAT THEY DO
Main Controls
The following main operating controls are provided on the front panel of
the Model 1076 Television Analyst. (See Figure 1).
1. POWER SWITCH. This Switch is labeled Off-Stby-On, and permits
the unit to be kept at readiness by using the Stand-by position to
keep the tubes hot, yet prevents any radiation of signal from the
unit. The pilot light will light in either the "Stby" or "On" position.
2. R.F. - I.F. SELECTOR SWITCH. By means of this Switch the
Television Analyst can be tuned to channels 2 through 6, 7, 8, 12 or
13. When switched to the I.F. position the unit will transmit on I.F.
Both R.F. and I.F. frequency generators are turned off in the "Off"
position of the R.F. Selector Switch.
3. I.F. TUNING. This control enables the Television Analyst to tune
any I.F. frequency between 20 me and 48 me.
4. VIDEO CONTROL. This Control is used to determine the amount
of Video or contrast of the picture.
5. HORIZONTAL CONTROL. This Control is a fine frequency ad­
justment of the horizontal oscillator circuit in the Analyst.
6. VIDEO POLARITY (+ or -) SWITCH. This Switch determines
whether the Video output signal will be of a positive or negative
polarity. The positive polarity indicates positive going sync pulses;
negative polarity indicates negative going sync pulses.
7. SYNC AMPLITUDE CONTROL. This Control adjusts the ampli­
tude and phase of the sync signal available from the Sync Output
jack. This control is calibrated in peak to peak volts for both sync
positive and sync negative. Clockwise rotation results in positive
sync. Counter-clockwise rotation results in negative sync.
8. COLOR OFF-ON SWITCH. This Switch is used to turn on the
color signal for a color rainbow or color bar display.
9. AUDIO SWITCH. The Audio Switch is labeled "Off-Audio-Tone".
In the "Off" position there is no audio signal being transmitted. In
the "Audio" position, any external source of audio can be used to
modulate the audio carrier. This source can be anything from .01
to 5 volts such as a microphone, F.M. tuner, record player, tape
recorder, etc. The "Tone" position of this switch turns on an internal
400 cycle audio oscillator which is used to modulate the F.M. carrier.
This tone can also be obtained at the 400 cycle output jack.
10. R.F. ATTENUATOR. The R.F. Attenuator Control determines the
amount of signal output of both R.F. and I.F. frequencies. At R.F.
this control should normally be set at mid-range.
11. NEGATIVE BIAS CONTROL. This calibrated Control enables the
operator to select a negative voltage to ground, between O and 50 volts.
12. VERTICAL DRIVE AMPLITUDE. This Control adjusts the ampli­
tude of both the vertical grid drive signal and the vertical plate drive
signal.
13. PLATE DRIVE SELECTOR. This three position Switch provides
a choice of a Vertical plate drive signal or a Horizontal plate drive
signal to directly drive a horizontal output transformer. The third
position is Off. When not using plate drive, this Switch should be
in '"Off" position, or tearing in the picture might occur.
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