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R&S
ZVB Performance
Test
1145.1078.82 1.9
E-1
Checking the Input Linearity
Instrument:
Spectrum analyzer (see Chapter “Test Equipment“, Item1)
Test cable (see Chapter “Test Equipment“, Item7)
Calibration kit (see Chapter “Test Equipment“, Item4)
R&S
®
ZVB settings:
- [
Preset
]
- [
Meas
: Wave Quantities: a1 Src Port 1]
[
Meas
: Wave Quantities: a2 Src Port 2]
[
Meas
: Wave Quantities: a3 Src Port 3]
[
Meas
: Wave Quantities: a4 Src Port 4]
- [
Meas Bandwidth
: 10 Hz ]
- [
Marker
]
- [
Sweep
: Sweep Type : CW Mode :
CW Frequency :
{f
GEN
*}
]
- [
Sweep
: Single :
Restart
]
* For measurement frequencies, see Performance Test Report {fGEN}
Test setup for reference
measurement:
Connect the spectrum analyzer to port 1 (port 2 to port 4)
Settings for the spectrum
analyzer:
- [
PRESET
]
- [
AMPT
: REF LEVEL : 15 dBm
- [
FREQ
: CENTER : f
GEN
]
- [
SPAN
: ZERO SPAN ]
- [
BW
: MANUAL RES BW :
10 Hz
]
- [
MARKER
: DETECTOR : RMS]
* For measurement frequencies, see Performance Test Report {fGEN}.
Reference measurement:
Set the ZVB and the spectrum analyzer to f
GEN
Set the ZVB output power to -40 dBm and increase the power in 5dB
steps up +10 dBm (+8 dBm)
Read off the level displayed by the spectrum analyzer and by the ZVB.
Reference offset L
offset
= L
ZVB,REF
-
L
SA, REF
R&S
®
ZVB settings:
- [
Meas
: Ratios: b1/a1 Src Port 1]
[
Meas
: Ratios: b2/a2 Src Port 2]
[
Meas
: Ratios: b3/a3 Src Port 3]
[
Meas
: Ratios: b4/a4 Src Port 4]
Test setup:
Connect a short male to port 1 (port 2 to port 4)
Measurement:
Set the ZVB output power to -40 dBm and increase the power in 5dB
steps up to +10 dBm (+8 dBm)
Read off the
ratio displayed by the ZVB (L
ZVB
)
Calculation:
Input linearity error @ xx dB = L
ZVB,
- L
offset
Summary of Contents for ZVB 4
Page 57: ...Instrument Construction and Function Description R S ZVB 1145 1078 82 I 3 2 E 1 ...
Page 133: ...1145 1078 82 5 5 E 1 Spare Parts List Mechanical Drawings ...
Page 142: ...1145 1078 82 5 15 E 1 Block Circuit Diagram ...
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Page 153: ...1145 1078 82 5 17 E 1 Circuit diagrams ...
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