Tektronix 1705A, Instruction Manual

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Operating Instructions
2- 14
1705A Spectrum Monitor
Customizing Frequency Readout
The type and location of the readout for the TEKTRONIX 1705A Spectrum
Monitor can be changed from the front panel. The options available are: 1. The
choice of having readout or turning it off. 2. The position on the crt where the
readout appears. 3. A customized readout that displays the satellite transponder
frequency rather than the L--Band tuner frequency.
The auxiliary setup menu used to make these selections is brought up to the crt
when both
←
SPAN/DIV
→
buttons are pushed simultaneously. Figure 2-10
shows the selections that are available from the crt menus. Pushing the
designated front-panel switch accomplishes the specified menu task. Note that
the solid lines in Figure 2-10 denote how to work through the menus, while the
dashed lines show how to exit from the menu and return to the normal monitor
display.
The readout control options share a software routine with the operator diagnos-
tics (Test) in the Main menu. The Main menu, along with the Readout Mode
and Test menus, use a cursor and select method of operation. With these menus
the selection is marked by moving the cursor, up with the SPAN
→
push button
or down with the
←
SPAN push button, and pushing the INPUT button to
complete the selection.
The Readout Position and Offset Adjust menus assign other functions to some of
the front-panel push-button switches. For these specific functions the names in
brackets correspond to front-panel switch names.
The selections for disabling/enabling the crt readout are contained in the Readout
Mode menu. Readout is turned off by setting the displayed cursor (>) next to the
OFF selection and pushing the INPUT push button. Readout is turned on by
moving the displayed cursor next to ON and pushing the INPUT push button.
Once the function is selected pushing the INPUT push button a second time
returns to normal monitor operation.
Pushing the RESOLUTION, VIDEO,
←
SPAN, and SPAN
→
push buttons after
the Readout Position auxiliary menu has been displayed moves the readout
around the crt area. Readout can be anywhere within the crt area. See Figure
2-10 for the function 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 of the SPAN buttons moves the readout. Push buttons can be held down
for smooth advancement, or pushed for each small movement increment. Once
the readout location is satisfactory, pushing the INPUT button saves the position
and returns to the Main menu. When the INPUT push button is pushed again,
the monitor returns to normal operation.
Turning On or Off Readout
Changing Readout
Position