R3765/67G Series Network Analyzer Operation Manual
10.3 Output Level Accuracy and Flatness
10-6
<Check> : Output level accuracy (under the output obtained in Step
above at 50
MHz) ( 0.5dB within a temperature range of 23
°
C to
±
5
°
C)
For OPT 11, OPT 13 or OPT 14 , the above output accuracy is guaran-
teed using TEST PORT 1.
For OPT 12 or OPT 13, add 5.7 dB (of the 50
Ω
to 75
Ω
conversion adapter
loss) to the output level.
For BG (OPT 12), -6.7 dBm
±
0.5 dB
For CG (OPT 12 or 13), -11.7 dBm
±
0.5 dB
10.3.3 Flatness
Preparations for measurements using OPT 12 and OPT 13 (acquiring frequency characteristic
data of the 50
Ω
to 75
Ω
converter adapter)
Measure the frequency characteristic of the 50
Ω
to 75
Ω
conversion adapter as shown
in Figure 10-3.
Define the peak to peak value of the frequency characteristics as X dB.
Figure 10-3 50
Ω
to 75
Ω
Conversion Adapter
Testing procedure
Calibrate the power meter to zero.
Set the R3765/67G series as follows.
Center frequency : 50MHz
Span
: 0Hz
Output level
: AG type 7 dBm (2 dBm for OPT 10)
BG type -3 dBm (-8 dBm for OPT 10, -1 dBm for OPT 12,
-6 dBm for OPT 10 + OPT 12)
CG type 0 dBm (-5 dBm for OPT 10, OPT 10 + OPT 11 or 14,
-6 dBm for OPT 12 or 13,
-11 dBm for OPT 10 + OPT 12 or 13)
Sweep mode
: HOLD
4
2
1
Network analyzer
(which must already
be calibrated)
* Perform a 2 PORT FULL CAL
on the N-type terminal side
of the N-SMA converter
(Frequency range: 300 kHz to 3.8 GHz)
50
Ω
to 75
Ω
converter adapter
N-SMA
converter
N-SMA
converter
75
Ω
n-type through
1
2