Rear Panel Connections - TM-9-4931-456-14-10034

3.3.1

(Cont'd)

C. Other Front Panel Controls (Cont'd)

COUNT ON/OFF Switch - Not used in this mode.

D. Rear Panel Connections

A (BNC) - The input signal for input A rate measurements is applied to this connector.

FLOWMETER - Input connector for RF flowmeter. Flow measurement signal is applied to this

connector.

REF. 1 MHz BNC - Test point for calibration of internal oscillator.

CONTROL Connector - Provides a means for external actuation of gating and reset functions.

Specific descriptions follow.

CHASSIS and COMMON Pins - See Section II.

EXT. RESET SW or PULSE Pins - Provide for external reset as required. The SW terminal

requires mechanical or solid state closure to COMMON. Must conduct 3 MA maximum with no

more than +0.4 V drop. The PULSE terminal is for pulse signals. (See Section I for

specification requirements.) GATE-SW Pin Not used in this mode.

EXT. START-STOP Pins - Not used in this mode.

E. Rear Panel Controls

A/FLOW Switch - Allows the operator to select either Input A to be measured, or the FLOW input

(RF Flowmeter) to be measured.

EXT. T. B./INT. T. B. Switch - Allows the operator to select either the internal 1 MHz crystal or an

external source of up to 1 MHz.

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