Anritsu 682XXB ユーザーズマニュアル
c. Press CHANNEL 2 DISPLAY: OFF.
d. Press CHANNEL 1 DISPLAY: ON.
e. Press CHANNEL 1 MENU key.
f. From the Channel 1 Menu display, select
POWER.
g. Press OFFSET/RESOLUTION.
b. Set Resolution to 5 dB/Div.
c. Adjust Offset to center the display.
2. Adjust the Switched Filter Shaper DAC for each
of the frequency bands as follows:
a. At the
$
prompt on the PC display, type:
calterm 138
and press <ENTER>.
NOTE
At the start of each frequency band, there
will be a delay while the minimum unlev-
eled power point is determined.
will be a delay while the minimum unlev-
eled power point is determined.
b. On the computer keyboard, use 1, 2, or 3 to in-
crement and 8, 9, or 0 to decrement the value
of the DAC’s setting to adjust the triangle
waveform being displayed on the 562 Network
Analyzer (Figure 4-5) for the most linear re-
sponse.
of the DAC’s setting to adjust the triangle
waveform being displayed on the 562 Network
Analyzer (Figure 4-5) for the most linear re-
sponse.
There will be a delay while the amplifier com-
pression point is determined and after each
key stroke as the DAC is adjusted.
pression point is determined and after each
key stroke as the DAC is adjusted.
c. When the DAC has been adjusted for the cur-
rent frequency band, press
Q
on the keyboard
to go to the next frequency band.
d. Repeat steps b. and c. until the DAC has been
adjusted for all frequency bands.
e. Press
Q
on the keyboard to exit the program.
(The
$
prompt will appear on the screen.)
f. Record step completion on the Test Record.
3. Store the calibration data in non-volatile memory
(EEPROMs) on the A17 CPU PCB as follows:
a. Type:
calterm 787
and press <ENTER>.
(The
$
prompt will appear on the screen when
the data has been stored.)
b. Record step completion on the Test Record.
4-20
682XXB/683XXB MM
SWITCHED FILTER
CALIBRATION
SHAPER CALIBRATION
CAUTION
When saving calibration data, turn-
ing off the instrument before the
ing off the instrument before the
$
prompt returns to the screen can
cause all stored data to be lost.
cause all stored data to be lost.
Decrement
DAC
Setting
DAC
Setting
Correctly
Adjusted
Adjusted
Increment
DAC
Settings
DAC
Settings
Figure 4-5.
Shaper DAC Adjustment
Waveform Examples