Anritsu 682XXB - Manual (Page 138)

NOTE
Before beginning this calibration proce-
dure, always let the 682XXB/683XXB
warm up for a minimum of one hour.
ALC Slope
DAC
Adjustment The following procedure lets you adjust the ALC
Slope over individual frequency ranges to compen-
sate for decreasing output power-vs-frequency in
analog sweep.
The procedure begins by letting you adjust the ALC
Slope for band 0 (0.01 to 2.0 GHz), if installed. It
then continues letting you adjust the ALC Slope
from 2 GHz to the top frequency of the instrument
in up to four bands. The band frequency ranges are:
Band 1 2.0 to 8.4 GHz
Band 2 8.4 to 20 GHz
Band 3 20.0 to 40.0 GHz
Band 4 40.0 to 65.0 GHz
During band 1 thru 3/4 ALC Slope adjustment, the
562 Network Analyzer display (Figure 4-8) shows
the response from 2 GHz to the top frequency of the
model, as adjustment is done band by band.
1. Set up the 562 Network Analyzer as follows:
a. Press the System Menu key.
b. From the System Menu display, select RESET .
c. Press CHANNEL 2 DISPLAY: OFF .
d. Press CHANNEL 1 DISPLAY: ON .
e. Press CHANNEL 1 MENU key.
f. From the Chanel 1 Menu Display, select
TRANSMISSION and SELECT INPUT
(NON-RATIO A) .
2. Set up the 683XXB as follows:
a. Reset the instrument by pressing SYSTEM
then Reset . Upon reset the CW Menu is dis-
played.
b. Press Step . The Step Sweep Menu is dis-
played.
c. Press FREQUENCY CONTROL , then Full to
select the full frequency range of the unit being
calibrated.
4-28 682XXB/683XXB MM
ALC SLOPE
CALIBRATION CALIBRATION
NOTE
For 683X5B models, the frequency
ranges for Band 0 and Band 1 are
0.5 to 2.2 GHz and 2.2 to 8.4 GHz re-
spectively.