Tektronix 2715, User Manual

Page: 83 / 360

Dedicated Controls
2715 User Manual
4–11
6. Press [
b
] three times.
The signal peak rises until it is just above the reference level, and the readout
indicates 18.3 dBmV. You cannot get the signal peak closer to the reference
level without entering a new reference level in the immediate entry mode.
7. Press [
y
] ten times.
The signal peak should drop to almost one division below the reference
level. The reference level readout should indicate 28.3 dBmV.
8. Press [REF LVL STEP] again.
REF LVL STEP is another toggle-action key. The LED goes out indicating
that the reference level is back in 10 dB per press mode.
9. Press [
b
].
Confirm that the reference level returns to 18.3 dBmV.
10. Reset the reference level to 38.8 dBmV.
Enhanced Versatility
The first part of this section covered the fundamental controls of the 2715. This
second part covers the remaining controls and how they enhance your ability to
make accurate spectral measurements easily and conveniently. We cover how to
control the resolution bandwidth, vertical scale factor, and sweep speed. We
show how to use display storage and marker controls to quickly measure signal
amplitude and frequency with maximum accuracy; and we show how to make
direct spectral comparisons and to save important results for future reference in
nonvolatile RAM (NVRAM).
100.0MHz (AUTO SWEEP) ATTN 20DB
38.8DBMV VF WIDE
20.0MHz/ 10 DB/
5MHz RBW (AUTO) Channel Table Name
CH nn CALIBRATOR
The Res BW controls select the 2715 resolution bandwidths of 300 Hz to 5 MHz
and allow time to be automatically selected to match the selected bandwidth.
Res BW