HP 35601A Operating And Service Manual page 91

Model 35601A Service
6-29. CONTROLLING THE hp- 35601A USING SUBPROGRAM "SWITCH"
Introduction
"SWITCH" is a subprogram of the -hp-35601 A test program. "SWITCH" enables the user
to control all of the switches, relays, and programmable parameters of the -hp- 35601A via a
computer. This subprogram is useful for troubleshooting since the -hp- 35601A has virtually
no front panel controls. After "SWITCH" has been initialized, the display of the computer
always shows the present setup state of the interface unit.
6-30. Initializing "SWITCH"
With either the Low or High Frequency Menu displayed, press shift SFK K6 (-hp-9836) or
shift SFK Kll (-hp-9845B) to initialize "SWITCH". (Refer to Automatic Tests and Ad­
justments to initialize the -hp-35601A test program.) After initialization, special function
key prompts are displayed along with the -hp-35601A interface setup status. If the -hp-
35601 A is in the turn on state, the following is displayed for the -hp-35601 A interface status:
INTERFACE SETUP
DAC VOLTAGE = 0 CONTROL VOLTAGE OUTPUT = 0
GAIN1 (dB) =0
GAIN2(dB) =6
LEADLAG FILTER =0
ATTEN1 =0
ATTEN2 =i
FO
"SWITCH" options can now be accesed through the use of special function keys or the en­
try of a command string. Special function key assignments and entry of a command string
are covered in the following sections.
6-31. Special Function Keys
The special function keys assignments used in the "SWITCH" subroutine permit each
switch, relay, amplifier, and attenuator in the -hp-35601 A interface to be controlled by a
computer. SFK K0 and Kl turn off the overload and out-of-lock indicators on the front
panel. SFK K2 through K7 are used to change various parameters of the signal path in the
Phase-Locked Loop Control board. When one of these keys (K2-K7) is pressed, the com­
puter displays a prompt for value. When the value of the parameter is entered, and continue
is pressed, the Interface Setup Status display is updated showing the present state of the -hp-
35601A. SFK K8 is used with the -hp-9836 computer to enter a command string (The -hp-
9845B computer allows entry of the command string without pressing a special function
key). Pressing SFK K9 (-hp-9836) or shift Kll (-hp-9845B) returns the user to the main por­
tion of the -hp-35601 A test program.
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