HP 132A, 53131A manual This is the bit from the Operation

/* Check status byte */

/* Wait 200 milliseconds */

/* if =1 then measurement complete */

Chapter 3 Programming Your Universal Counter for Remote Operation

Programming Examples

To Use Limits to Filter Data Before Measuring Statistics (Turbo C) (Continued)

IOEOI(isc,state);	/* Enable	use of EOI */
sendhp(":FUNC 'FREQ 1'");	/* Make a	frequency measurement */
sendhp(":FREQ:ARM:STAR:SOUR IMM");	/* These 3 lines enable */
sendhp(":FREQ:ARM:STOP:SOUR TIM");	/* time arming with a .001 */
sendhp(":FREQ:ARM:STOP:TIM .001");	/* second gate time */
sendhp(":STAT:OPER:ENABLE 256");	/* Computing statistics bit in
	Operation Status register */
sendhp(":STAT:OPER:NTR 256");	/* When statistics are complete, */
sendhp(":STAT:OPER:PTR 0");	/* the bit will go from high to low
	so a negative transition is
	needed to enable the bit that is
	summarized in the Status Byte
	register. */
sendhp("*SRE 128");	/* This is the bit from the Operation
	Status register that is summarized
	in the Status Byte Register */
sendhp(":CALC3:LFIL:STAT ON");	/* Enable statistics filter */
sendhp(":CALC3:LFIL:LOWER 1 MHz");	/* Set lower limit to 1 MHz */
sendhp(":CALC3:LFIL:UPPER 2 MHz");	/* Set upper limit to 2 MHz */
sendhp(":CALC3:AVER ON");	/* Enable statistics */
sendhp(":CALC3:AVER:COUNT 50");	/* Use 50 measurements for stats */
sendhp(":CALC2:LIM:STAT ON");	/* Enable limit testing. This must
	happen in order to see limit
	graph */
sendhp(":CALC2:LIM:LOWER 1 MHz");	/* Set lower limit */
sendhp(":CALC2:LIM:UPPER 2 MHz");	/* Set upper limit */
sendhp(":CALC2:LIM:DISP GRAPH");	/* Display limit graph */

/* Waiting for the measurement to complete */

printf("Waiting for measurement to complete\n");

sendhp(":INIT:CONT ON");/* Start making measurements */ do

{

IOSTATUS(isc,condition,&status);

delay(200);

}

while (status!=1);

/* Measurement is complete, get the data */

3-94 Programming Guide