Agilent Technologies 4294A Operating Manual page 343

f: frequency in MHz.
VmV: oscillator level in mV.
Impedance Measurement Accuracy at 7-mm Port of the 42942A
Equation 10-2 shows the impedance measurement accuracy [%] at the 7-mm port of the
42942A Terminal Adapter.
Equation 10-2 Impedance Measurement Accuracy [%] at 7-mm Port of 42942A
Where,
E ' =
P
Y ' =
O
Z ' =
S
Yo, Ep, Zs: See Figure 10-3 on page 340
E
posc
at oscillator level > 500 mV
at oscillator level > 125 mV,
£ 500 mV
at oscillator level £ 125 mV
Ky
osc
at oscillator level ³ 500 mV
at oscillator level < 500 mV
Kz
osc
at oscillator level > 500 mV
at oscillator level > 250 mV,
£ 500 mV
at oscillator level £ 250 mV,
> 125 mV
Chapter 10
Specifications and Supplemental Performance Characteristics
Z '
æ
S
-------- -
E = E ' + + Y
è
P
Z
X
[%]
E + E + E
PBW POSC P
[S]
´ ´ ( )
K Ky Y + Y
BW OSC ODC O
´ ´ [W]
K Kz Z
BW OSC S
[%] =
=
=
ö
× ´
' Z 100
ø
O X
V
f
æ ö
mV
-------- - ´ --------- - 1
–
è ø
100 500
0
125
æ ö
--------- - 1 ´ ( )
– 0.05 + E
è ø
PBW
V
mV
1
500
--------- -
V
mV
f
-------- -
2 +
100
500
--------- -
V
mV
250
--------- -
V
mV
Basic Characteristics
335