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e. Checking
pulse response
(overshoot,
ringing
etc.
)
The generator mentioned under d), should be connected via a 50 2 cable and a General Radio power
divider, type 874-TPD,
terminated at the oscilloscope input by a 50 2 termination pad, General
Radio type 874-WM.
A sampling oscilloscope e.g. PM 3400 must also be connected to the power divider in order to
check the pulse form to which the display on the oscilloscope under test should be referred.
f. Checking trigger functions
PHILIPS Sine-wave Generator type PM 5125 (or PM 5160) is recommended for this check.
g. To check the PM 3370 main frame,
use the PHILIPS Test Unit PM 3363
———
et
eee
B. SAMPLING
OSCILLOSCOPES
a. Checking the triggering and the time-base circuit®)
For the checking of these circuits we recommend the use of Tektronix Pulse Generator type 284,
PHILIPS Digital Multimeter PM 2421, PHILIPS Timer/Counter PM 6630, a 10 dB attenuator e.g.
General Radio 874G10, a 50 2 cable and a 50 2 termination pad e.g. PM 9585.
b. Checking mixer and deflection amplifier
c. Checking the stabilized supply voltages and the low-voltage rectifier
The recommended instrument for this check is the PHILIPS Digital Multimeter PM 2421 which
should be connected to the circuits under test via a screened cable,
d. Checking the sampling amplifier™)
For this check we recommend the use of Tektronix Pulse Generator type 284, two 6 dB attenuators
e.g. General Radio 874G6, one 20 dB attenuator e.g. General Radio 874G20 and a 50 2 cable with
a length of <30 cm e.g. 4822 320 10009,
For the tangential noise measurents we recommend
PHILIPS Pulse Generator type PM 5770, to-
gether with a 100x attenuator and a 50 2 cable e.g. 4822 320 10012.
e. Checking and adjusting after replacement of the sampling gate*)
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