Check And Adjustment - Philips PM 5132 Instruction Manual

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4.3.
4.3.1.
4.3.2.
4.3.3,
CHECK AND ADJUSTMENT
General
— The limits mentioned in this paragraph are valid only for a newly adjusted instrument and therefore
might deviate from the values as stated in paragraph 1.2. 'Technical Data"'.
— Adjustment of the instrument is only permitted after a warm-up time of at least 30 minutes at an
ambient temperature of (+23 +3)° C and when connected to a mains voltage of 220 V +5 %. The
cabinet must be closed.
— The printed circuit board is mounted overhead. Nevertheless all trimming potentiometers and
capacitors are accessible from the top. For adequate temperature stability during adjustment, the
cabinet should be removed only for a short time and so far that the required adjusting element
is just accessible.
— If not explicitely stated otherwise, the voltage potentials refer to the relevant contact measured
against circuit earth (_| 4).
— The following abbreviations are used for setting and measuring instruments:
x = Button pressed
- = Button not pressed/unlocked
fe) = Button only tipped
D.V.M. (d.c.) = Digital voltmeter for DC measurements e.g. PM 2534
OSC. = Oscilloscope e.g. PM 3055
Cc = Counter e.g. PM 6665
Fg = Function generator e.g. PM 5132
DA = Distortion analyzer e.g. HP 333A
50 Q = 50 22 terminating resistor e.g. PM 9585
Preparations
— All trimming potentiometers and capacitors in mid-position; (only for complete new adjustment).
— Turn dial potentiometer to extreme counter clockwise position.
Position dial such that the 0,4 graduation on the dial is positioned to the text plate mark.
— Solder joints A to K must be closed. To be opened for failure detection only.
— Terminate the OUTPUT by a 50 Ohm resistor.
General functional test
— Actuate all buttons one after the other for rough functional test of the generator by means of an
oscilloscope connected to the OUTPUT socket.
— Control the TTL output.
— Roughly control the output voltage at the SWP VOLTAGE socket during the internal sweep.