Agilent Technologies 4294A - Page 343

Chapter 10 335
Specifications and Supplemental Performance Characteristics
Basic Characteristics
10. Specifications and
Supplemental Performance
Characteristics
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,
[%]
[S]
[W]
Yo, Ep, Zs: See Figure 10-3 on page 340
EE
P
'
Z
S
'
Z
X
---------
Y
O
' Z
X
×+
èø
æö
100´+=
E
P
' E
PBW
E
POSC
E
P
++=
Y
O
' K
BW
Ky
OSC
´ Y
ODC
Y
O
+()´=
Z
S
' K
BW
Kz
OSC
´ Z
S
´=
E
posc
[%] =
at oscillator level > 500 mV
at oscillator level > 125 mV,
£ 500 mV
0
at oscillator level £ 125 mV
Ky
osc
=
at oscillator level ³ 500 mV 1
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
f
100
---------
V
mV
500
----------
1–
èø
æö
´
125
V
mV
----------
1–
èø
æö
0.05 E
PBW
+()´
500
V
mV
----------
2
f
100
---------
+
500
V
mV
----------
250
V
mV
----------