Keysight 41800A, Operation Note

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Keysight 41800A Active Probe 49
Adjustment
LF Gain/Flatness Adjustment
Procedure
1. Connect the power splitter to the Keysight 4195A as shown in Figure 5-1
(1).
2. Sequentially press the following Keysight 4195A front panel keys, to set the
Keysight 4195A to the adjustment settings.
CONFIG, 'NETWORK', PRESET
AMPLITUDE
(CHANNEL 1 side) , -, 1, 4, ENTER/EXECUTE
REF ATTEN (CHANNEL 1 side) , 0, ENTER/EXECUTE
TEST ATTEN (CHANNEL 1 side) , 0, ENTER/EXECUTE
START, 1, 0, Hz/dBµV
STOP, 5, 0, MHz/V
MENU, 'TRIGGER menu', 'SINGLE mode', 'return'
'RESOLUTN menu', 'No. of POINTS', 2, 1, ENTER/EXECUTE
'return', 'TYPE lin log'
( “log” in the 'TYPE lin log' softkey
will change to intensified green.)
DISPLAY, 'TRACE B on off' ( “off” in the 'TRACE B on off' softkey
will change to intensified green.)
AUTO (The yellow LED in the AUTO key will
turn on.)
3. Sequentially press the following keys to perform a normalize (thorough)
calibration, and wait until the message “Cal completed” is displayed.
CAL, 'TRANS CAL menu', 'NORMLIZE (THRU)', 'THRU', ENTER/EXECUTE
4. Press the Keysight 4195A's CAL key and the 'CORRECTN on off' softkey to
activate the Keysight 4195A's correction capability. The “ on ” in this softkey
will change to intensified green.
5. Disconnect CABLE 1 (see Figure 5-1 (1)) from the power splitter, and
connect the 41800A between the power splitter and CABLE 1 as shown in
Figure 5-1 (2).
6. Press the Keysight 4195A's TRIG/RESET key to make a single sweep
measurement.
7. Enter the “REF=A(21)+0.5” command and “DIV=0.1” command to set the
scale of the Keysight 4195A's display, using the following key sequence.
SCALE REF, 'A REF LEVEL', blue shiftkey , A, MATH OPERATOR,
'(', 2, 1, ')', ' + ', 0, ., 5, ENTER/EXECUTE
SCALE REF, 'A /DIV', 0, ., 1, ENTER/EXECUTE