CircuitDescription-7D15
amplifieretc.,isconnected to the Gate Generator clear
TIM WIDTHA
input.This setsthe Gate Generator output LO and closes
Refer to Fig.3-4 forsignalflow.The signalatthe A input
the Main Gate .
isprocessed through the attenuators,amplifiers,shaper,
slope circuit,and A Arm circuit.This signalbypasses the
TIM A-BANDTIM WIDTHA AVERAGE
Gate Generator via the Bypass Amplifier.The signalalso
flipsthe Arm Gate Generator HI,which inturn opens theRefer to Fig. 3-4 and Fig. 3-5 for signal flow. The
Main Gate to allow the clock pulses to be counted .averaging procedure forthe TIM mode isdifferentthan for
the period or frequency modes of operation. The TIM
averaging modes allow the Main Gate to open and close
10, 100, or 1,000 times .This isaccomplished by disabling
the InitiateGenerator until after 10, 100 or 1,000
TIM A--Bare made .The inputsignalisconnected to
measurements
Refer to Fig.3-5 forsignalflow.The TIM A--B mode, inthe Averaging Counters via the Bypass Amplifier in the
effect,opens the Main Gate with a triggerfrom the A Input,TIM WIDTH A mode, or to the Gate Generator inthe TIM
then closes the Main Gate with the a triggerfrom the BA-B mode .The output ofthe Averaging Counters inhibits
Input. The procedure is as follows: The A signal isthe Initiategenerator untilafter10,100, or 1,000 pulses of
processed through the attenuators, amplifiers,shaper,the input signals are counted .The Initiategenerator, in
and slope circuit.The signalisthen connected tothe Gateturn, clears the Arm Gate and holds ituntilafterthe
Gate,
Generator and Arm Gate Generatoras inthe Period mode .preselected numberof averages . The AND
The AND Gate goes HI and the Main Gate opens .The Btherefore,opens and closes toallow the main gate tomake
signal,after being processed through the B attenuator,10, 100 and 1,000 separate measurements .
Channel A SignalClock Signal
Averaging SignalPath
GATE
1433-4
Fig.3-4 .Signal flow for TIM WIDTHA mode .
3-6 |
ACEC
