How To Select The Het Band - HP 8642A Operation And Calibration Manual

Model
8642AjB
Operation
RF Frequency (cont'd)
SPCL 8
Display
.....
1
(:J :J
f7I
f7I f7I
171
IT/
7
I. _
...J t-I t-I t-I t-I
Ilf
L
'R€O
• 1 LJ 17/ 17/ T/ ITI
I 1
t-/.t-I .LI '"
AMPTD
Frequency has been set to 1 230000 MHz. The cursor above the frequency display
setting indicates frequency is the active function.
How To Select the Het Band (Special FUllction 8)
Either you can select the Het band or the Signal Generator will select He! band
opera tion as described below
• Selecting Special Function 8 configures the instrument to operate
III
the Het band
whenever the RF frequency is less than 132.187501 MHz, regardless of FM or <PM
deviation or Phase Continuous Frequency Sweep span:
SPCL
(CSRlFIl
0 ) CD·
Turn off Special Function
8:
SPCL ({ SHIFT)
0 )
m
[QJ []].
e
The Signal Generator will automatically select the Het band if you select a
combination of RF frequency and FM or <l>M deviation, or a Phase Continuous
Frequency Sweep span beyond the capabilities of the Signal Generator's divide banes.
The Signal GeIlera tor a utomatically switches back to a divide band when the
combination of functions selected allow divide band operation (unless the Het band is
selected with Special Function
8).
Example
Configure the Signal Generator to operate in the Het band at frequencies less than
132.187501 MHz, regardless of FM or 1>M deviation or Phase Continuous Frequency
Sweep span settings.
DATA
LOCAL
(keys)
8
SPCL
HEr
GO]
~
(program
SP 8
codes)
Display
8. PRE FER
UETERriT/UriE
rl _ _
'-'.LI
.:J " _
BRn]
SPCL
After entering SPCL []], the Signal Generator displays the number
and
description
of
tlte Special FUllctil)J\ just entered (To return the display to instrument settings
prcvi(l\lsly displayed, press the
[9Hlm
key twice) The SPCL annullciator indicates
the currellt use
of a
Spelial Functioll.
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