Sending The Data Message; Receiving The Trigger Message; Receiving The Clear Message - Agilent Technologies 11713A Operating And Service Manual

Attenuator/switch driver

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Table Of Contents

Table of Contents

Remote Operation

The data string is further defined as follows:

Ax Bx Ay By A/B 9 A/B 0

where: Ax Bx = data string for ATTEN X

(x can be none, one or more of the digits 1, 2, 3, or 4)

Ay By = data string for ATTEN Y

(x can be none, one or more of the digits 5, 6, 7, or 8)

Note that if Ax (Ay) uses a digit, then that digit may not be used in Bx

(By).

A/B 9 = GPIB command for switch S9

A/B 0 = GPIB command for switch S0

The data string contains the operation selected by the user (desired

contact closure, value of attenuation, etc.). The coded command from

the controller is converted by the driver into control voltages. The

output control voltages drive the device and illuminate front panel

lights that indicate the operation selected.

Table 6-2 shows the relationship between each programming code and the

effect it has on the output at each connector/pin.

Table 6-3 shows the programming strings required to set up various three

and four-section attenuators to the desired levels of attenuation.

Program Execution Time

The response time for the driver is defined as the time between data

valid (DAV) changing from a high to a low and the output signal at the

rear panel connector changing state. The switching speed of the Agilent

Technologies programmable attenuators is 20 ms including 10 ms for

the driver (ATTEN outputs). The switching speed for the RF switches is

20 to 50 ms plus 20 ms for the driver (S9 and S0 outputs).