HP 8756A Operation Manual

Model 8756A
Operating Information
3. SWEEP IN 0-lOV
Input BNC connector accepts the 0 to +10 volt sweep ramp
signal from the sweep oscillator.
4. POS Z BLANK
Input BNC connector accepts retrace and bandswitch blanking
and accepts negative Intensity Marker (Z-axis modulation)
signals. The signal levels sensed on this input are +5
volts for blanking, 0 volts for display, -4 volts for
markers, and -8 volts for the Active Marker.
5. STOP SWEEP
Output BNC connector provides the interface signal to stop
the sweep on the 8350B Sweep Oscillator or the 8340A
Synthesized Sweeper, used only when these are controlled by
the 8756 SYSTEM INTERFACE.
NOTE
Connection of the SWEEP IN 0-lOV and the POS Z BLANK
from a sweeper or source are the minimum requirements
needed for proper operation of the 8756A. When the
8350B Sweep Oscillator or the 8340A Synthesized
Sweeper is connected to the 8756 SYSTEM INTERFACE,
connection of STOP SWEEP is mandatory.
6. MODULATOR DRIVES
Output connectors, each providing 27.8 kHz square wave
signals (nominally+/- 6 volts, unloaded), for driving
external HP 11665B modulators or the external Amplitude
Modulation of a sweep oscillator. When using the 8340A
Synthesized Sweeper, this modulator drive should be
connected to the PULSE MODULATION INPUT.
7. DISPLAY OUTPUTS
Output connectors providing X, Y, and z outputs for driving
another peripheral such as a large screen display (for
example, Model 1310B). The added peripheral should have a
bandwidth of 5 MHz or greater. The open circuit amplitude
of the X and Y axis outputs range from 0 to 1 volt from a
source impedance of about 340 ohms. The Z axis output has
the same voltage range, but a source impedance of about 250
ohms. A 0 volt Z axis output corresponds to display mode,
1 volt output corresponds to blanking mode. These output
circuits are designed for use with Hewlett-Packard large
screen displays with 10 K ohms impedances, and cannot drive
impedances less than 600 ohms. Cable lengths to this
display should not exceed 6 feet (1.83 meters).
8. POWER LINE MODULE
Input connector accepts line voltage. Line voltage
selection of 100, 120, 220, or 240 volts is chosen by
correctly inserting the printed circuit selector board.
Refer to Fig. 2-1 in Section II Installation for
instructions.
Figure 3-3. Rear Panel Operating Features (2 of 2)
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HP 8756A Specifications

General

Brand	HP
Model	8756A
Category	Measuring Instruments
Language	English