Agilent Technologies 35670A Service Manual page 263

Agilent 35670A
For the optional four channel analyzer, do the following to adjust common mode
G
rejection:
• Set the power switch to off (
• Connect the BNC(f)-to-minigrabber adapter to the BNC cable. Connect
both minigrabber clips (signal and ground) to A5 TP8 and the BNC
connector to the analyzer's CH 1 connector.
• Set the power switch to on ( I ).
• Press the following keys:
[
System Utility
[ ]
MORE
[
SERVICE TESTS
[
ADJUSTMTS
[
CHANNEL 1 ADJUSTMNT
[ ]
CMRR
Wait for the analyzer to set up the adjustment. The analyzer is ready when
the adjustment message appears on the screen.
• While monitoring the
minimum marker value.
• Disconnect the BNC cable from the analyzer's CH 1 connector and connect
to the CH 2 connector.
• Press the the following keys:
[ ]
Rtn
[
CHANNEL 2 ADJUSTMNT
[ ]
CMRR
Wait for the analyzer to set up the adjustment. The analyzer is ready when
the adjustment message appears on the screen.
• While monitoring the
minimum marker value.
• Disconnect the BNC cable from the analyzer's CH 2 connector and connect
to the CH 3 connector.
• Press the the following keys:
[ ]
Rtn
[
CHANNEL 3 ADJUSTMNT
[ ]
CMRR
Wait for the analyzer to set up the adjustment. The analyzer is ready when
the adjustment message appears on the screen.
).
O
]
]
]
]
value, adjust A2 R43 in the lower slot for a
Y:
]
value, adjust A2 R43 in the upper slot for a
Y:
]
Adjusting the Analyzer
To adjust common mode rejection
5-15