Chapter 4 261
Key Function Descriptions
Key Descriptions
PLOTTER CONFIG Accesses plotter configuration options to set the
plotter address, to assign the origin, and to plot trace A,
trace B, the graticule, or the frequency annotation.
Front-panel key access:
CONFIG
NOTE If the message CONNECT PLOTTER appears briefly in the active function
area of the display when executing any plot function, and there are no
other errors, the plotter is not connected to the GPIB. Check that the
GPIB cable between the spectrum analyzer and plotter is functional
and that the plotter is turned on.
If the CONNECT PLOTTER message appears, and either ERR 109
CtrlFail or ERR 110 NOT CTRL are displayed, the spectrum analyzer is
not able to take control of the GPIB. Disconnect any other controller
from the bus.
If the message CHECK PLOTTER appears briefly in the active function
area of the display when executing any plot function, the plotter is not
responding to a query for its P1 and P2 coordinates. Check that the
plotter is not set to listen-only.
POSITIVE BIAS Selects positive mixer bias for an external mixer. This
value, which can be entered using the data keys, the
step keys, or the knob, appears in the active function
block and is expressed in milliamps. When the bias is
greater than 0 mA, a "+" appears on the left edge of the
display.
Front-panel key access:
AUX CTRL
POST SCLR Displays the value of the post-scaler divider within the
fractional N assembly. This value is used to divide down
the raw oscillator frequency to the required fractional
N frequency.
Front-panel key access:
CAL
POWER MENU Accesses the menu of power measurements including
occupied power bandwidth, channel power and carrier
power. Adjacent channel power measurements are
found under the ACP MENU softkey.
Front-panel key access:
MEAS/USER
POWER ON Sets the instrument state to the state stored in the
power-on register, which is the same state that occurs
when
LINE is switched on. This state must be saved
initially under the
SAVE key.
Front-panel key access:
RECALL
PRESEL AUTO PK Automatically peaks the preselector on the desired
signal on a trace.
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