Operating Instructions
2-14 1705A Spectrum Monitor
Customizing FrequencyReadoutThe type and location of the readoutfor the TEKTRONIX 1705A Spectrum
Monitor can be changedfrom the front panel. The options available are: 1. The
choice of having readoutor turning it off. 2. The position on the crt where the
readout appears. 3. A customized readout that displays the satellite transponder
frequencyrather than the L--Band tunerfrequency.
The auxiliarysetup menu used to make these selections is brought up to the crt
when both ←SPAN/DIV→buttonsare pushed simultaneously. Figure 2-10
shows the selections that areavailable from the crt menus. Pushing the
designated front-panel switch accomplis hes the specified menu task. Note that
the solid lines in Figure 2-10denote how to work through the menus, while the
dashed lines show how to exitfrom the menu and return to the normal monitor
display.
The readout controloptions share a softwareroutine with the operator diagnos-
tics (Test)in the Main menu. The Main menu, along with the Readout Mode
and Testmenus, use a cursor and select method of operation. With these menus
the selectionis marked by moving the cursor, up with the SPAN→push button
or down with the ←SPANpush button, and pushing the INPUT button to
complete the selection.
The Readout Position and OffsetAdjust menus assign other functions to some of
the front-panelpush-button switches. For these specific functionsthe names in
bracketscorrespond to front-panel switch names.
The selections fordisabling/enabling the crt readout are contained in the Readout
Mode menu. Readout is turned offby setting the displayed cursor (>) next to the
OFF selection and pushing the INPUT push button. Readout is turned on by
moving the displayed cursornext to ON and pushing the INPUT push button.
Once the functionis selected pushing the INPUT push button a second time
returns to normal monitor operation.
Pushing the RESOLUTION, VIDEO, ←SPAN, and SPAN→pushbuttons after
the Readout Position auxiliarymenu has been displayed moves the readout
around the crt area. R eadoutcan be anywhere within the crt area. See Figure
2-10 for thefunction of the push-button switches in the Readout Position menu.
Pushing any one of the four(newly assigned positioning) buttons returns to the
normal display,with readout. At this point, pushing RESOLUTION, VIDEO, or
either ofthe SPAN buttons moves the readout. Push buttons can be held down
for smooth advancement, or pushed for each small movement increment. Once
the readoutlocation is satisfactory, pushing the INPUT button saves the position
and returnsto the Main menu. When the INPUT push button is pushed again,
the monitor returns to normal operation.