Tektronix 1780-R Manual Do Utilizador
Measurements
4–14
1780R-Series Operator’s Manual
Table 4–3: DP & DG Front-Panel Configuration
VECTORSCOPE
Vector display enabled, other choices locked out.
WAVEFORM
Demodulated sweep displayed, all front-panel choices
locked out. (There is no LED to indicate demodulated
sweep.)
locked out. (There is no LED to indicate demodulated
sweep.)
INPUT
Status does not change. All differential modes locked out; if
a differential mode was enabled, input is forced to CH A.
a differential mode was enabled, input is forced to CH A.
REFERENCE
Status does not change.
FILTER
Locked out.
WFM SWEEPS
Set to Two Line when DP & DG is selected. Field, One Line,
and Two Line Sweeps are locked out.
GAINS
Vectorscope and Waveform gains can be adjusted while in
DP & DG mode; the new settings will be stored and recalled
at next entry to DP & DG mode.
WAVEFORM POSITION
The Horizontal and Vertical Position controls can be
adjusted while in DP & DG mode; the new settings will be
stored and recalled at next entry to DP & DG mode. The
Vertical Position control range is limited to keep the signal
on screen. The Vertical Position control range is limited in
order to keep the signal on screen.
adjusted while in DP & DG mode; the new settings will be
stored and recalled at next entry to DP & DG mode. The
Vertical Position control range is limited to keep the signal
on screen. The Vertical Position control range is limited in
order to keep the signal on screen.
VOLT / TIME CURSOR
Not available in DP & DG mode.
DP & DG Measurement Information
Single-Trace DP & DG.
While the 1780R-Series provides two methods
of making differential phase and differential gain measurements,
only the single-trace method is available for simultaneous differen-
tial phase and gain measurements. A two-line display is used to
display the two measurements simultaneously on one CRT
(waveform monitor), with single-trace diff phase on the left portion
of the CRT and single-trace diff gain on the right portion of the CRT.
only the single-trace method is available for simultaneous differen-
tial phase and gain measurements. A two-line display is used to
display the two measurements simultaneously on one CRT
(waveform monitor), with single-trace diff phase on the left portion
of the CRT and single-trace diff gain on the right portion of the CRT.
The single-trace method of differential phase and gain measurement
resembles differential phase on the TEKTRONIX R520A-Series.
This method requires the operator to normalize the gains, but those
resembles differential phase on the TEKTRONIX R520A-Series.
This method requires the operator to normalize the gains, but those
Measurements
4–14
1780R-Series Operator’s Manual
Table 4–3: DP & DG Front-Panel Configuration
VECTORSCOPE
Vector display enabled, other choices locked out.
WAVEFORM
Demodulated sweep displayed, all front-panel choices
locked out. (There is no LED to indicate demodulated
sweep.)
locked out. (There is no LED to indicate demodulated
sweep.)
INPUT
Status does not change. All differential modes locked out; if
a differential mode was enabled, input is forced to CH A.
a differential mode was enabled, input is forced to CH A.
REFERENCE
Status does not change.
FILTER
Locked out.
WFM SWEEPS
Set to Two Line when DP & DG is selected. Field, One Line,
and Two Line Sweeps are locked out.
GAINS
Vectorscope and Waveform gains can be adjusted while in
DP & DG mode; the new settings will be stored and recalled
at next entry to DP & DG mode.
WAVEFORM POSITION
The Horizontal and Vertical Position controls can be
adjusted while in DP & DG mode; the new settings will be
stored and recalled at next entry to DP & DG mode. The
Vertical Position control range is limited to keep the signal
on screen. The Vertical Position control range is limited in
order to keep the signal on screen.
adjusted while in DP & DG mode; the new settings will be
stored and recalled at next entry to DP & DG mode. The
Vertical Position control range is limited to keep the signal
on screen. The Vertical Position control range is limited in
order to keep the signal on screen.
VOLT / TIME CURSOR
Not available in DP & DG mode.
DP & DG Measurement Information
Single-Trace DP & DG.
While the 1780R-Series provides two methods
of making differential phase and differential gain measurements,
only the single-trace method is available for simultaneous differen-
tial phase and gain measurements. A two-line display is used to
display the two measurements simultaneously on one CRT
(waveform monitor), with single-trace diff phase on the left portion
of the CRT and single-trace diff gain on the right portion of the CRT.
only the single-trace method is available for simultaneous differen-
tial phase and gain measurements. A two-line display is used to
display the two measurements simultaneously on one CRT
(waveform monitor), with single-trace diff phase on the left portion
of the CRT and single-trace diff gain on the right portion of the CRT.
The single-trace method of differential phase and gain measurement
resembles differential phase on the TEKTRONIX R520A-Series.
This method requires the operator to normalize the gains, but those
resembles differential phase on the TEKTRONIX R520A-Series.
This method requires the operator to normalize the gains, but those