A Oscilloscope Operating and Service Manual. Part Number: ( Aug 76). The A is no longer sold by Keysight; this manual is provided for. To buy, sell, rent or trade-in this product please click on the link below: http://www · MODEL A. OSCILLOSCOPE. HEWLETT-PACKARD COMPANY/ COLORADO SPRINGS DIVISION. GARDEN OF THE GODS ROAD, COLORADO.
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Position and Sync Balance A3R32 1. Change to HP Part, No. This is the reset condition for the ramp. When the trigger signal is lost, A7C13 discharges and A7Q17 turns on. As the intensity knob is rotated clockwise, the beam will get brighter, up to a point; beyond this point it will decrease in brilliance and may defocus.
Table contains the list of manufacturers’ codes. Perform rise time test as follows: If the serial prefix of your instrument is not the same as the one on the title page, find your serial prefix in table and make all changes to the manual that are listed for that serial prefix. When input coupling is in the position AlSlA-C closedthe input signal is terminated in 50 ohms.
The performance upon receipt, and your accuracy requirements. Delayed sweep is started ph a negative-going pulse at the collector of A10Q Jp on algebraic sum or difference of signals. To order a part not listed in the table, provide the following information: The change is coupled through the primary winding on A15T1 to the base of Q1 and causes the amplitude of its oscillations to change.
DELAY o control may be adjusted to view other pulses in the pulse train.
The trigger view amplifier is enabled in this mode and the vertical state 1740x signal drives the delay line through the trigger view amplifier. To reinstall A5, reverse removal procedure. Current required by A7Q23 is supplied through A11R4.
Base reference voltages on both transistors is correct at 12v. This section contains functional descriptions keyed to simplified block diagrams. The integrated circuits 7140a in this in- strument are plug-in types. This arms the second Schmitt trigger.
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In main sweep operation, the gate follows the main sweep. Use a blade- type screwdriver to position line-voltage selection switch through opening in bottom cover. Vertical Section Heat sink can remain on bracket or be removed.
Return controls to initial settings.
Apply 1-kHz sine wave. Disconnect 2 and 9 wires from A1 1. Disconnect delay line wires 46and 0 from rear of Vertical Output Amplifier A5. Knr additional important information about serial mini hers, see f N STKl: Perform blanking test as follows: Connect digital voltmeter to A3TP HP part number of item s.
Disconnect equipment and return Model A controls to initial settings.
Channel A Sync Circuit. Gain and position of the vertical and horizontal sections are controlled from the logic state analyzer. The unrectified cathode voltage in the second- ary of the high-voltage transformer is applied to a multiplier assembly where it is multiplied four times. Fast-rise pulse generator Adapter: A secondary winding on the high-voltage transformer provides voltage for the CRT cathode heater.
Both the high- and low- frequency cutoffs are determined by A7R5 and A7C6. Chris, Google [Bot]Leigh, Prutser and 5 guests. If A3R90 is changed, recheck steps m and n for correct balance. Interconnection Diagram Sheet 1 of 2.
The ac line is applied to the input 1740z circuit,or Vac operation is selectable.
At high intensity levels these transistors are sometimes operating at fairly high voltages and are therefore subject to failure.
Change HP Part No.
Disconnect plug to Gate Amplifier Assembly A It sends a control signal to the vertical preamplifier which is used to select channel A vertical display and channel B sync. A trigger signal can now be developed.
The complementary signal at the collector of A7Q20 enables the gate Schmitt schematic 12 and turns the gate on. Since conditions for making the measurements may differ from one circuit to another, always check the specific conditions listed for each schematic.