TM 9-6625-474-14&P-3
Counts are accumulated in the decade counters during
either the positive portions of the pulse widths or the
negative portions, dependent on the SLOPE polarity
selection for the Channel B signal.
EVENTS A DURING B (Averageable)
This mode is exactly like the WIDTH B (Averageable)
mode, except that the output of the Time Base is disabled
and the output of Channel A is applied directly to the
Count Input of the Decade Accumulators. For this mode,
the pulse width at the output of Channel B is routed to the
produce the Measurement Gate Interval. The Channel A
events are averaged for 10” pulse widths from Channel B.
RATIO A/B (Averageable)
The Time Base output is disabled and not used for this
mode; Channel A signals are routed directly to the Count
signals and the Channel A signals are counted during that
time.
TOTALIZE A
In the TOTALIZE A mode the Measurement Gate is
generated by the START/STOP switch on the front panel
or via the Remote Start/Stop line at the rear interface. The
Circuit, and Gate Generator circuits are not used for this
mode. Instead of accumulating clock signals from the
signals are accumulated during the START/STOP inter-
val.
TIME MANUAL (Variable Clock)
For this mode there are no inputs to Channel A or
Circuit whose output is routed directly to the Count Input
of the Decade Accumulators. The Measurement Gate
interval is generated either by using the START/STOP
switch on the front panel or by changing the voltage level
on the Remote Start/Stop input at the rear interface.
Decade Accumulators, 6-Decade Counter/8-
Decade Latch
The 1st DCU consists of ECL flip-flops, requiring
ECL/TTL conversion to drive the first decade latch The
2nd DCU operates at TTL levels and drives the second
decade latch directly. From that point, there are six more
internal counters and six more decades of latch, all
contained in one integrated circuit. This arrangement
provides a total of eight decades of count and eight
decades of latch.
The 6-Decade Counter/8-Decade Latch circuit has its
own internal oscillator to generate the Time Slot informa-
tion. It also generates the Scan Clock, Overflow, and BCD
output data. Between the time slots and BCD data there is
enough information to drive the Display. The zero blank-
ing function is also provided internally.
Measurement Cycle Timing
The display timing, reset, clear, and load (latch)
functions for the decade counters are provided by the
Measurement Cycle Timing circuit.
Decimal Point and Annunciator Encoder
The decimal point location is determined by encoding
circuits using the time slot information and information
Summary of Contents for DC503a
Page 1: ...e x _ 1 v w W i L ...
Page 16: ...DC 503A DC 503A Universal Counter Timer REV A FEB 1981 XIV ...
Page 27: ...Fig 2 2 Controls and connectors Operating Instructions DC 503A 2977 fli English 2 3 ...
Page 39: ...Fig 2 2 Commandes et prises Instructions d utilisation DC 503A French 2 3 ...
Page 51: ...Abb 2 2 Bedienungselemente and Anschliisse Bedienungsanleitung DC 503A German 2 3 ...
Page 63: ...Fig 2 2 Controls and connectors Operating Instructions DC 503A 2971 01 Japanese 2 3 ...
Page 125: ...Fig 8 2 Auxiliary Board A12 Assy ADJUSTMENT LOCA 2971 1 6 ...
Page 169: ...SEE END OF MPL FOR WIRE ASSEMBLIES O1 0 pG C 0 DC 503A ...
Page 186: ...0 2 TM 9 6625 474 14 P 3 Fig 0 1 DC 503A Universal Counter Timer ...
Page 188: ...Table 1 1 1 2 TM 9 6625 474 14 P 3 ...
Page 189: ...Table 1 1 1 3 TM 9 6625 474 14 P 3 ...
Page 190: ...Table 1 1 1 4 TM 9 6625 474 14 P 3 ...
Page 191: ...Table 1 1 1 5 TM 9 6625 474 14 P 3 ...
Page 192: ...1 6 Table 1 1 TM 9 6625 474 14 P 3 ...
Page 193: ...Table 1 1 1 7 Table 1 2 Table 1 3 TM 9 6625 474 14 P 3 ...
Page 194: ...Table 1 3 Table 1 4 1 8 TM 9 6625 474 14 P 3 ...
Page 197: ...2 3 TM 9 6625 474 14 P 3 Fig 2 2 Controls and connectors ...
Page 211: ...3 5 Fig 3 1 TM 9 6625 474 14 P 3 ...
Page 219: ...4 2 TM 9 6625 474 14 P 3 Table 4 1 LIST OF TEST EQUIPMENT REQUIREMENTS ...
Page 240: ...5 7 TM 9 6625 474 14 P 3 Fig 5 9 Rear interface connector assignments ...
Page 256: ...8 3 8 4 blank TM 9 6625 474 14 P 3 ...
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Page 258: ...Fig 8 2 Fig 8 1 8 7 8 8 blank TM 9 6625 474 14 P 3 ADJUSTMENT LOCATIONS ...
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Page 263: ...8 17 8 18 blank TM 9 6625 474 14 P 3 Table 8 3 COMPONENT REFERENCE CHART See Fig 8 3 ...
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Page 275: ...8 41 8 42 blank TM 9 6625 474 14 P 3 DC 503A Table 8 9 COMPONENT REFERENCE CHART See Fig 8 3 ...
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Page 277: ...8 45 8 46 blank TM 9 6625 474 14 P 3 DC 503A Table 8 10 COMPONENT REFERENCE CHART See Fig 8 4 ...
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Page 291: ...D 1 TM 9 6625 474 14 P 3 APPENDIX D MANUAL CHANGE INFORMATION ...
Page 292: ...D 2 TM 9 6625 474 14 P 3 ...
Page 293: ...D 3 TM 9 6625 474 14 P 3 P a g e 1 o f 2 ...
Page 294: ...Page 2 D 4 TM 9 6625 474 14 P 3 ...
Page 296: ...D 6 TM 9 6625 474 14 P 3 ...
Page 298: ......
Page 299: ...THE METRIC SYSTEM AND EQUIVALENTS ...
Page 300: ...PIN 056816 000 ...