Tektronix TYPE 109, Инструкция по эксплуатации

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SECTION 1
General Information
The Tektronix Type 109 Pulse Generator is a fast-risetime
pulse generator similar to the pulse generator section of the
Type 110. The Type 109 is capable of producing pulses of
different widths, calibrated-amplitudes, and polarities for
use in driving and testing the response of devices operating
in the nanosecond region.
An external network, supplied with the Type 109, provides
long duration pulses with an amplitude decay of only 10%
in 400 nanoseconds. This network is useful for testing ampli­
fier linearity or tuning delay lines.
Pulse Amplitude
Three calibrated ranges: 0 to 0.5 v, 0 to 5 v, 0 to 50 v.
Accuracy is within 3% of the front-panel full-scale mark­
ing. Each range is continuously variable.
± 5 0 volts is the maximum calibrated amplitude using the
internal power supply; ± 3 0 0 volts maximum allowed
using an external supply and either or both contacts.
Polarity
Positive or negative.
CHARACTERISTICS
Vertical Deflection Factor: 200 mv/cm
Equivalent Sweep Rate: 0.2 nsec/cm
Charge Line: One 10-nsec 50-ohm RG-8A/U
cable connected between 5012 CHG. LINE
1 and 50 ß CHG. LINE 2 connectors.
Risetime
Less than 0.25 nsec (nanosecond or 10“9 second). Pulse
risetime is illustrated in Figs. 1-1 and 1-2.
F ig . 1 -2 . W a v e fo rm sh o w in g the T yp e 1 0 9 p ulse d is p la y e d on a
T e k tro n ix T yp e 6 61
(S a m p lin g ) O sc illo sc o p e . Co m b ined risetim e
of the system , b etw ee n 1 0 % a n d 9 0 % a m p litu d e le v e ls , is less
th a n 0 .4 n a n o se co n d s.
R IS E T IM E LESS T H A N 0 .2 5 nsec
1 nsec
F ig . 1 - 1 . A d o u b le e x p o su re p h o to g ra p h o f the output p u lse from
the T y p e 1 0 9
(n o e x te r n a l c h a rg e lin e ) a n d a 1 g ig a c y c le / s e c
tim ing t ra in . The w a v e fo rm s a r e d is p la y e d on a T e k tro n ix 0 .1 2 - n s e c
risetim e
re se a rc h -ty p e o sc illo sc o p e . T h is p h o to g ra p h sh o w s the
risetim e to b e w e ll u n d e r 0 .2 5 n se c. The m inim um p ulse w id th is
a p p r o x im a te ly 0 5 nse c. N ote the fre e d o m from o v e rsh o o t.
Duration
From approximately 0.5 nsec measured at the 50% ampli­
tude level (see Figs. 1-1 and 1-3), to a maximum of 100
nsec at a repetition rate between 550 to 720 cycles using
a single charge line to both contacts; 300 nsec at half
repetition rate by using either one open-ended charge
line with the unused contact grounded or by using two
separate open-ended charge lines.
An accessory, a special external charge network sup­
plied with the Type 109, provides a fast-rise pulse with an
RC decay (see Fig. 1-4) and a pulse amplitude which is
about one-tenth that indicated by the front-panel mark­
ing. Decay is only 10% in 400 nsec (see Fig. 1-5). Fig.
1-6 shows the pulse waveform at an equivalent sweep
rate of 1 nsec/cm.
®
1-1