Frequency Entry; (Normal Mode) - Tektronix 2715 User Manual

Frequency Entry

(Normal Mode)

2715 User Manual
3. Press [ b ] adjacent to [CHAN/FREQ].
The channel selection steps to the previous channel.
The up arrow selects the next higher channel in the channel table, whereas the
down arrow selects the previous channel. If you step past the end of the channel
table, the display wraps to the start of the table (and vice versa). The keys remain
active whenever the 2715 is in the spectral display mode.
Keypad Entry. CHAN/FREQ defaults to CHAN whenever the CATV mode is
active. The abbreviation CHAN appears at left center of the 2715 screen. CHAN
indicates that you can enter the channel number directly from the keypad. This is
done by keying in a permissible channel number (according to the selected
channel table) followed by [W]. Enter the desired channel number with the
front-panel keypad to select a channel.
NOTE. In the CATV mode, frequency can be entered by terminating the entry with
the [X], [Y], or [Z].
In the nonCATV mode, [CHAN/FREQ], the associated [ y ] and [ b ], and all
the terminator keys exclusively control frequency. The nonCATV mode is enabled
by pressing [CATV/APPL] [8] [0].
For instance, to select channel 8 in the specified table, do the following steps:
4. Press [8] [W].
The numbers appear on the screen to the right of CHAN. If you make a
mistake, correct it any time prior to pressing [W] by repeatedly pressing
[BKSP] (the backspace key) until the incorrect number disappears and then
type the correct number. Pressing [W] ends the entry, and the 2715 interprets
the currently displayed value as Channel 8.
The other terminators are used for channel frequency entry. For example, if you
enter a certain frequency, the displayed channel number defaults to the channel
within whose limits the entry falls.
The frequency controls set the 2715 normal center or start frequency in the
normal or CATV mode.
FREQ/MKRS. This procedure shows how to adjust the center frequency using the
FREQ/MKRS knob.
1. Press [INPUT] [9] to turn on the calibration signal.
2. Press [1] [0] [0] [X] to set the center frequency to 100 MHz.
Dedicated Controls
4–5