Block

Mask

This block determines the frequency (in Hz) of a signal connected to the GATE pin of one counter/timer of a National Instruments NI6602 card.

Bus Type	This popup menu enables the user to select the bus type of the target computer where the NI6602 card is installed. The options are PCI or PXI.
PCI index	Enter the PCI index (see definition)of the card on the PCI (or PXI) bus.
Counter	Specify the counter to which gate pin the input signal is connected.
Clock Source	Three clock sources are available: 100 KHz, 20 MHz and 80MHz. This selection has a direct impact on the timing precision of the measurement.
Digital Filter	This parameter allows each GATE input pin to be passed through or digitally filtered to remove noise. The digital filter sample the signal using Timebase 3, and upon detecting a state change, require it to be in the same state for a minimum pulse width of 5us, 1us,500ns or 100ns.
Synchronize	see definition.

This block has no inputs.

Freq	Returns the measured frequency, in Hz.

Connect the input signal to be measured to the GATE pin of the selected counter.

Pin	Description	Pin	Description
1	+5V	35	RG
2	SOURCE(0)	36	GND
3	GATE(0)	37	Reserved
4	Reserved	38	Reserved
5	OUT(0)	39	GND
6	UP_DOWN(1)/AUX_LINE(1)	40	UP_DOWN(0)/AUX_LINE(0)
7	SOURCE(1)	41	GND
8	GATE(1)	42	GND
9	OUT(1)	43	RG
10	PFI_0	44	PFI_1
11	GND	45	PFI_2
12	PFI_3	46	GND
13	PFI_4	47	PFI_5
14	GND	48	PFI_6
15	PFI_7	49	GND
16	OUT(7)	50	GND
17	UP_DOWN(7)/AUX_LINE(7)	51	GATE(7)
18	GND	52	SOURCE(7)
19	RG	53	OUT(6)
20	GND	54	UP_DOWN(6)/AUX_LINE(6)
21	GATE(6)	55	GND
22	SOURCE(6)	56	RG
23	OUT(5)	57	UP_DOWN(5)/AUX_LINE(5)
24	GND	58	GATE(5)
25	SOURCE(5)	59	GND
26	OUT(4)	60	UP_DOWN(4)/AUX_LINE(4)
27	GND	61	GATE(4)
28	SOURCE(4)	62	GND
29	OUT(3)	63	UP_DOWN(3)/AUX_LINE(3)
30	GND	64	GATE(3)
31	SOURCE(3)	65	GND
32	OUT(2)	66	UP_DOWN(2)/AUX_LINE(2)
33	GND	67	GATE(2)
34	SOURCE(2)	68	GND