Theory of Operation— 2236 Service
place a LO on pin 5 of U1004A. The output of U1004A will
therefore be the Delay End signal and will be applied to pin
13 of U1004C. Whenever Enable is HI, the Delay End signal
will drive the D input of Q1001A.
The two counter chains will be enabled for counting
whenever the D input of U1001A is LO. This will occur be
tween the end of the delay interval and the end of the B
Sweep. Signal routing to the counters is the same as that
described in the “Nongated Period” section.
See Figure 3-9 for a simplified circuit diagram for width
measurement operation and Figure 3-10 for circuit
waveforms.
NONGATED WIDTH. In this mode, the Width signal is HI,
which results in Q1012 being biased off and Q1011 being
biased on. Pin 9 of U1004B is LO and pin 9 of U1002B is
HI,which configures U1002B as an inverting buffer. Since
Q1011 is on, the output of U1002B will drive pin 12 of
U1003C. The D input of U1001A is driven by Enable, and
U1004B pin 11 is driven by Enable.
When Enable goes HI, the next positive transition of the
synchronizer input signal clocks the Q output of U1001A
LO. The output of U1003C is then the complement of the
synchronizer input signal as long as Enable remains HI. En
able being HI also causes pin 15 of U1004C to go LO. The Q
output of U1001B will track with its D input, synchronous
ENABLE
IN P U T
S IG N A L
100M H z
U 1 0 0 1 A -Q
U 1 0 0 1 B -Q
Cl
C 2
4204-24
3-24
Figure 3-7. Typical waveforms for the Nongated Period function.
Содержание 2236
Страница 10: ...2236 Service viii The 2236 Oscilloscope ...
Страница 28: ...Specification 2236 Service 1 18 ADD JAN 1985 Figure 1 2 Physical dimensions of the 2236 Oscilloscope ...
Страница 74: ...Theory of Operation 2236 Service 3 30 ...
Страница 75: ...Theory of Operation 2236 Service Figure 3 13 Typical waveforms for the Delta Time function with Valt HI 3 31 ...
Страница 102: ...Performance Check Procedure 2236 Service 4 21 Figure 4 1 Test setup for DMM common mode check ...
Страница 240: ...2236 Service CTM INTERFACE SIGNALS F ig u re 9 4 O s c illo s c o p e b a sic b lo c k diag ram 4294 46 ...
Страница 241: ... VERT DEFL 2236 Service 4 2 0 6 3 5 4 2 0 4 4 7 F ig u re 9 5 O scillo sco p e d e ta ile d b lo c k diag ram ...
Страница 242: ...2236 Service 4204 34 Figure 9 6 CTM basic block diagram ...
Страница 243: ...DMM POWER S U P P LIE S 2236 Service F ig u re 9 7 C T M d e ta ile d b lo c k diag ram ...
Страница 253: ...A10 COUNTER TIMER MULTIMETER BOARD F ig u re 9 8 C irc u it b o a rd lo c a tio n Illu s tra tio n ...
Страница 254: ...S I 0 O I 5 1 S O i 4204 21 C IR C U IT BOARD INTERCONNECTIONS ...
Страница 255: ...2 2 3 6 S e rv ic e A ll c o m p o n e n ts on th e A 2 A tte n u a to r b o a rd are lo c a te d on D ia g r a m ...
Страница 267: ...1 2 3 4 5 6 7 8 9 J T K L M_ _ ___ N___l _ P____l S ...
Страница 271: ...1 2 3 4 5 6 7 8 9 lO P2SO O U1 A TRIGGER V T O W2500 5 A 223 R E V A P R W G ...
Страница 275: ......
Страница 280: ......
Страница 285: ...A 6 F IL T E R B O A R D lo c a te d u n d e r H V S h ie ld ...
Страница 311: ...1 2 3 4 5 6 7 8 9 A I B L c T D T E t F ___ ____G____ ___ H___ j ____ J _j K j_ I ____i_ i___ N _ _ j___ P j S ...
Страница 313: ...2236 Service T O U I 3 0 0 4 8 K T O UI300 II S K 0 2 2 3 6 Z Z O A Z 2 OPTION IA ...
Страница 317: ...A 10 C O U N T E R T IM E R M U L T IM E T E R B O A R D A D J U S T M E N T LO C A T IO N S ...
Страница 319: ...2236 Service TROUBLESHOOTING GUIDE 4206 99 4204 69A ...
Страница 323: ...9 ...
Страница 324: ...2 REV APR 1986 ...
Страница 325: ...2236 SERVICE ...
Страница 326: ......
Страница 332: ......
Страница 333: ...2236 SERVICE ...
Страница 334: ...2 4 2 1 ...
Страница 338: ......