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SDI LNFR-100E Manual de usuario Pagina 55

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NOISE DETECTOR, ND-3-NM
FEATURES
• Ultra-low system noise floor
• RF bandwidth: 1 GHz to 18 GHz
• Integrated PLL and calibration port
• External mixer input
APPLICATIONS
• AM/PM noise measurements
• Characterization of components
DESCRIPTION
Model ND-3 is a detector module that may be used to measure AM or PM
noise. The module has a noise detector that can be used to make very high-resolution
single channel measurements. Two modules can be combined to create a dual-channel
measurement system. A dual-channel system with cross-correlation noise analysis can
allow an effective reduction of at least 10 – 20 dB from the system noise floor. The IF
amplifier has variable gain and bandwidth settings. The IF amplifier input can be
switched to the front panel to allow connection of an external mixer. A calibration input
is available for gain calibration. The ND-3 includes an adjustable bandwidth phase-lock
loop that can be used when measuring oscillators to lock the reference and device
under test.
The ND-3NM plugs into the NMS mainframe and requires one of the Noise
Measurement System Controllers. The NMSC-1 provides Fourier noise analysis from
DC to 1 MHz from the carrier. The NMSC-2 extends the Fourier frequency analysis
range up to 40 MHz. The ND-3NM uses one slot of the system mainframe.
Option A: 1-45 GHz mixer Option B: 1-26 GHz mixer
For Medium Level Detector option (+10 dBm to +20 dBm) add -M to the part number.
For High Level Detector option (+15 dBm to +27 dBm) add -H to the part number.
SPECIFICATIONS
PARAMETER CONDITIONS MIN TYP MAX UNITS
RF measurement range carrier level
+ 7 to + 17 dBm
- 1 - 18 - GHz
IF bandwidth low
high
-
-
DC - 1
0.001 - 40
-
-
MHz
MHz
IF gain -
-
-
+26
+46
+60
-
-
-
dB
PLL tuning bandwidth carrier
+ 7 dBm to + 17 dBm
- 0.01 - 100 - kHz
System residual PM noise
@ 10 GHz, +13 dBm carrier
Fourier frequency
1 Hz
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
-
-
-
-
-
-
-
-130
-140
-150
-160
-168
-170
-170
-127
-137
-147
-157
-165
-167
-167
dBc/Hz
SDI
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