Agilent Technologies 87130A manual Optimizing Switching Speed, 1 Relay Drive Sequence

Optimizing Switching Speed

NOTE

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Installing the 87130A Attenuator/Switch Driver

Connecting Switch Drivers to Switches and Attenuators

To increase the speed at which your switch matrix operates, refer to the table below to determine which four relays, when connected, will be on the same drive lines.

a.Refer to Figure 2-6to wire your relays into the arbitrary positions of OPEN and CLOSE.

b.Refer to the section “Example Speed Calculation” on page 4-74for an explanation on calculating and minimizing overall switching time.

Switching speed is a function of pulse widths, sensing delays, the state of the chosen channels, the sequence of relays driven and the power supply recovery time. Pulse widths, sensing delays, and which channels are opened or closed are determined by the user, and cannot be predicted here.

The channel number must be preceded by the driver card number. Channels connected to driver card 1 would be numbered 100 to 130; card 2, 200 to 230; card 3, 300 to 330, and so forth up to card 800 to 830. All of these channels are set with the drive enabled.

Table 2-1 Relay Drive Sequence

Drive Line	Connector Locator	Channel List
1	J1, J2, J3, J4	00, 01, 02, 03
2	J5, J6, J7, J8	04, 05, 06, 07
3	J9, J10, J11, J12	08, 09, 10, 11
4	J13, J14, J15, J16	12, 13, 14, 15
5	J17, J18, J19, J20	16, 17, 18, 19
6	J21, J22, J23, J24	20, 21, 22, 23
7	J25, J26, J27, J28	24, 25, 26, 27
8	J29, J30, J31	28, 29, 30

NOTE	The maxium Power Supply Recovery Time should only be required when
	driving multiple external driver boards with longer interconnect cables. A
	significant switching speed advantage can be realized if this value is reduced
	from the 200 msec default. See the command called “TRIGger” on
	page 4-62and the “Example Speed Calculation” on page 4-74.

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