HP 35601A Operating And Service Manual

Service Model 35601AKO ... Toggle OverloadPressing this key resets the Overload Flip-Flop on the A5 board which turns off theOVERLOAD indicator on the front panel of the -hp- 35601 A. If an overload condition stillexists, however, the overload Flip-Flop will immediately set again. In this case, the frontpanel indicator will remain on. Pressing KO will not turn the indicator on (i.e. set theOverload Flip-Flop) if it is off.K1 ... Toggle Out-Of LockPressing this key resets the Out-of-Lock Flip-Flop on the A5 board which turns off theOUT-OF-LOCK indicator on the front panel of the -hp- 35601 A. If an out-of-lock condition still exists, the Out-of-Lock Flip-Flop will immediately set again. In this case, the frontpanel indicator will remain on. Pressing Kl will not turn the indicator on if it is off.K2 ... Change DACWhen this key is pressed the display prompts the operator to enter a number from -10 to 10.When this number is entered and CONTINUE is pressed, the computer sends the appropriate data to the -hp-35601A. (The number must be a multiple of 0.04 or the softwarewill round the absolute value of the number to the lower multiple of 0.04.) In addition, thecomputer display is updated to show the present output voltage of the DAC.K3 ... Change GainlThis key affects the gain of the 0-28dB Amplifier. When the calculator prompts the user toenter a number, a multiple of 4 from 0 to 28 should be entered, followed by pressing CONTINUE. The -hp- 9845B will change the gain to the value entered and update its display toreflect the change.K4 ... Change Gain2This key affects the gain of the 6-20dB Amplifier. When the calculator prompts the user toenter a number, a multiple of 2 from 6 to 20 should be entered, followed by pressing CONTINUE. The computer will change the gain to the value entered and update its display toreflect the change.K5 ... Change Lead LagThis key changes the lead/lag characteristics of the phase-locked loop on the A5 board.When the calculator prompts the user, a number from 0 to 7 should be entered followed bypressing CONTINUE. The computer will change the lead/lag number to the entered valueand update its display to reflect the change.K6 ... Change AttenuationlPressing this key enables the user to change the attenuation of the 0-20dB Attenuator. Thecomputer prompts the user to enter a number (1, .5, .2, or . 1) that represents the ratio of theoutput voltage to the input voltage of the attenuator. When CONTINUE is pressed, thestate of the attenuator is changed and the calculator display is updated.6-47