Amplifier Research 75A250A Podręcznik - Strona 9

Przeglądaj online lub pobierz pdf Podręcznik dla Wzmacniacz Amplifier Research 75A250A. Amplifier Research 75A250A 20 stron. Self-contained, broadband radio frequency (rf) amplifier

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Model 75A250A

2.2.2 Remote Operation (continued)

2.2.2.6

IEEE-488 Communications (continued)

IEEE-488 Serial Poll

Response (STB)

(binary/decimal)

(01000001) 65

(01000010) 66

(01000011) 68

(01000100) 72

2.2.2.7

RS-232 Communications

If the RS-232 interface is active, the Model 75A250A will test for a properly connected RS-232

interface when it is switched into the remote operation mode. In order for the Model 75A250A to

recognize an RS-232 connection, the "Data Carrier Detect" (DCD) line must be asserted. This

line is sampled continuously to determine if the RS-232 connection is broken; therefore, it must

remain asserted in order for the RS-232 interface to function. The "Clear To Send" (CTS) line is

also used to gate information from the Model 75A250A. This line must be asserted in order to

receive information from the Model 75A250A. The CTS line can be used as a "handshake" line

to inform the Model 75A250A when it is permissible to send information. If the CTS line is de-

asserted in the middle of a transmission, the character in the process of being transmitted will be

completed and further transmission will halt until the CTS line is re-asserted.

Model 75A250A itself asserts two lines: "Data Terminal Ready" (DTR) and "Request To Send"

(RTS). The DTR line is continuously asserted, while the RTS line is used to gate information into

the Model 75A250A. Connector pin-out information is given in Table 2-3.

Table 2-2

Remote Error Codes/Messages

Model 75A250A Error Condition

BPM FAULT

THERMAL FAULT

INTERLOCK FAULT

PS1 FAULT

Manual Text

RS-232

Error

Message

The

2-6

REV A