HP 3326A Operating And Reference Manual page 65

Calibrat~on and
S e l f
Test
tion enables the HP 3326A to maintain a
xternal reference. The phase relationship
A - E ~ T ~ C A L I N
between channel A and the external reference of the same frequency is sensed through
the rear panel A-EXT
4
CAL IN and B-EXT
4
CAL INIMULTI
4
REF IN connectors. After
calibrating channel A phase to the external reference, channel B phase is internally
11-10 VPPl
calibrated to channel A phase. The external calibration inputs require an input range
~ E K T ~ C A L I ~
from 3 to 10 volts peak-to-peak over the frequency range of 1 kHz to 13.1 MHz. Figure
llMULTi
4
REF iN
1-28 illustrates a typical multiphase calibration circuit. Amplitude, dc offset, and inter-
@
nal modulation are calibrated with internal references.
(1-$0 VPPi
HP-IB
Example:
"CMD3"
or
"CMD MULT"