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Performance Test
R&S
ZVB
1145.1078.82 1.8
E–4
Checking the Output Linearity
Instrument:
Spectrum analyzer (see Chapter “Test Equipment“, Item1)
Test cable (see Chapter “Test Equipment“, Item7)
Test setup:
Connect the spectrum analyzer to port 1(port 2 to port 4)
Spectrum analyzer settings:
Note:
Synchronize the reference oscillators in the spectrum analyzer and in the
R&S
®
ZVB :
– [
PRESET
]
– [
FREQ
: f
GEN
*]
– [
SPAN
: ZERO SPAN ]
– [
BW
: MANUAL RES BW :
100 Hz
]
– [
MARKER
: DETECTOR : RMS ]
– [
AMPT
: REF LEVEL :
5 dBm
]
– [
Mode
: ALC :
On
]
* For measurement frequencies, see Performance Test Report {fGEN}.
R&S
®
ZVB settings:
– [
Preset
]
– [
Meas
: Wave Quantities: a1 Src Port 1
(a2 Src Port 2, a3 Src Port 3, a4 Src Port 4)]
– [
Sweep
: Sweep Type : CW Mode :
CW Frequency :
{f
GEN
*}
;
Power :
{l
GEN
*}
]
– [
Sweep
: Single :
Restart
]
* For measurement frequencies {fGEN} and levels {l
GEN
}, see
Performance Test Report
Measurement:
Read the spectrum analyzer’s marker values (level L) .
Calculation:
The measured values are referred to the level at the R&S ZVB setting of
–10 dBm.
Calculating the generator level linearity:
Level linearity = L
– L
@–10dBm
– step width (in dB)
Step width = l
gen
– (–10 dBm) (reference)
Содержание ZVB 14
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