Tektronix 2715, Руководство пользователя

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Getting Started
2715 User Manual
2–9
In immediate entry mode, you press the key corresponding to the parameter you
wish to set ([CHAN/FREQ], [SPAN/DIV], or [REF LEVEL]), type the
parameter value on the keypad, and press the appropriate terminator key to
complete the entry. The value appears on screen as you type.
Each of the terminators ([W], [X], [Y], and [Z]) can represent more than one unit
as indicated by the legend to the right of each key; however, the keys are context
sensitive. If an entry represents a frequency, the indicated frequency unit is
selected automatically when you press the key. If dBs are required, the indicated
dB unit is selected, and so on for all of the units.
Many keys are toggle-action. The ability to undo an action, including menu
selection, by pushing the same button or sequence of buttons that carried out the
action is typical of operations performed on the 2715.
8. Press [VID FLTR] to observe the toggle action.
The red video filter LED illuminates, and the trace shrinks vertically as the
filter turns on and averages the noise.
9. Press [VID FLTR] again.
The noise spectrum expands to its original size as the filter is turned off, and
the LED goes out.
The 2715 can emit tones under the following conditions:
H
During power-on self test
H
When an abnormal condition occurs
H
When a message appears
H
When a key is pressed
The instrument emitted self-test beeps when it was powered up. The beep can be
set to sound when an error occurs, when a key is pressed, when either happens,
or it can be set to never sound.
If the error alert is turned on and an abnormal condition exists, such as a request
to extend a measurement parameter beyond its range, the 2715 emits a high-level
beep. A message is simultaneously displayed on-screen describing the abnormal
condition.
Sounds