User`s manual

Using the Multiplexer 35
Chapter 2
Using the Multiplexer
What’s in This Chapter
This chapter contains the following sections:
• Reset Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 35
• Switching or Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 36
• Switching Channels to the Analog Bus. . . . . . . . . . . . . . . . . Page 36
• Recalling and Saving States . . . . . . . . . . . . . . . . . . . . . . . . . Page 52
• Detecting Error Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . Page 53
Reset Conditions At power-on or following the reset of the module (*RST command), all 256
channel relays, 21 tree relays, and five analog bus connection relays are
open. The nine C relays are in their normally closed position. In addition,
after a
*RST command, the scan channel list is empty. Table 2-1 lists the
parameters and default values for the functions following turn-on or reset.
Table 2-1. Agilent E8462A Default Conditions for Power-on and Reset
Parameter
Default
Value
Description
ARM:COUNt 1 Number of scanning cycles is one.
TRIGger:SOURce IMM Advances through a scanning list automatically.
INITiate:CONTinuous OFF Continuous scanning disabled.
OUTPut[:STATe] OFF Trigger output from EXT, TTL, or ECL sources is disabled.
[ROUTe:]SCAN:MODE NONE Channel list is not set up.
[ROUTe:]SCAN:PORT NONE Analog bus connections are disabled.
[ROUTe:]FUNCtion WIRE2 2-wire mode is set at power-on. FUNCtion is not changed by *RST.
DIAGnostic:INTerrupt[:LINE] 1 Interrupt line setting. NOT changed by *RST.
DIAGnostic:INTerrupt:TIME 0.005 Sets interrupt timer value. NOT changed by *RST.
DIAGnostic:SCAN:DELay 0.0 Wait time between opening and closing channels. Reset by *RST.
Channel state All 256 channels are open (CH000-255 are open).
Tree relays state All 22 tree relays are open (CH9000-9021).
Routing relays state All routing relays are open and use the normally closed path
(CH9100-9108).
Analog bus connection relay status 5 analog bus relays are open (CH9200-9204).
Channel list from SCAN command (after *RST) Channel list is empty following a reset of the module with *RST command.