whenever any of the PHASE keys are pressed. The phase ranges from -180 degrees to +180 degrees and is the phase delay from the reference input signal.

Power

This is the instrument'sPOWER switch. When the power is turned off, the front panel settings are retained so that the instrument will return to the same settings when the power is next turned on.

When the power is turned on, the OUTPUT DIGITAL DISPLAY will show the SERIAL NUMBER of the instrument and REFERENCE DISPLAY shows the model number of the instrument. All displays return to normal after 2 seconds.

Local and Remote

When the instrument is programmed via the computer interface to be in the REMOTE state WITHOUT LOCK-OUT, the DISPLAY UP key will return the instrument to LOCAL front panel control. If the instrument is in the REMOTE WITH LOCK-OUTstate, no front panel key will return the status to LOCAL. In this case, a RETURN TO LOCAL command must be sent over the computer interface or the power must be turned off and back on.

Defaults

If the REL key is held down when the POWER is turned on, the instrument settings will be set to the defaults shown below instead of the settings in effect when the power was turned off.

Parameter

Setting

BANDPASS

OUT

LINE

OUT

LINE X 2

OUT

SENSITIVITY

500 mV

DYN RES

LOW

DISPLAY

X

EXPAND

OFF

REL

OFF

OFFSET

OFF (value=0)

PRE TIME CONSTANT

100 mS

POST TIME CONSTANT

0.1 S

ENBW

1 Hz

REFERENCE MODE

f

TRIGGER MODE

SYMMETRIC

REFERENCE DISPLAY

FREQUENCY

PHASE

0°

Whenever default values are used at power up, the red ERR LED will turn on for about 3 seconds. If the ERR LED is on when the instrument is powered on without the LOCAL key down, then the instrument is ignoring the retained settings. This can be due to a low battery.

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