HP 8753E manual Duplexer Measurement

5 Au9 1 9 9 8 13:10:11

CHl	s21	LO8	1 0	dB/REF	- 4 0	dB
CH2	s12	LOG	1 0	dB/REF	- 4 0	dB

PRm

Cot-

E	E	1	0	dB/REF	0	dB
		1	0	dB.‘REF	0	dB

PRm

Cot-

				I						I
T		I			I			II
CHl/CH3	CENTER		8 6 0 . 0 0 0	0 0 0 MHz		SPAN	120 . 000 0 0 0		MHz
CHZ/CH4	CENTER		8 6 0 . 0 0 0	0 0 0 MHz		SPAN	120 . 000 0 0 0		MHz

Figure 2-7. Duplexer Measurement

Ref 1: FWD Sll <A/R)

Trans: FWD 521 <B/R)

T r a n s : R E V S12 <FI.‘R)

Ref 1: REV S22 (B/R)

ANALOG IN A u x I n p u t

CONVERSION COFFI

INPUT

PORTS

Normally, a 2-port calibration requires a forward and reverse sweep to Cnish before updating the displayed trace. For faster tuning, it is possible to set the number of sweeps for the active display (Sll and S21 for channel 1 in this case) to update more often than the unused parameters. In this example we choose 8 updates of the forward parameters to 1 update of the reverse in channel 1, and 8 updates of the reverse to 1 update of the forward in channel 2 (where the active parameters are S22 and S12).

::.......

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2-16 Making Measurements