6
U3751-1E Jan. ’05
Specifications
Frequency
Frequency range: 9 kHz to 8 GHz
Frequency band: 9 kHz to 3.1 GHz (Band 0)
3.0 to 8 GHz (Band 1)
Preamplifier: 10 MHz to 8 GHz
Frequency reference
Aging: 2 x 10
-6
/year
Temperature stability: 2.5 x 10
-6
(0 to 50°C)
Frequency counter
Resolution: 1 Hz to 1 kHz
(RBW: <100 kHz, input signal level: >-50 dBm,
CW and single signal)
Frequency stability
Residual FM (zero span): <60 Hz p-p/100 ms
(internal frequency reference)
Frequency span
Range: 0, 10 kHz to Full
Accuracy: <±1% of Span
Spectrum purity: -85 dBc/Hz, offset: 10 kHz; span: <200 kHz
Resolution bandwidth
Range: 300 Hz to 3 MHz (1-3 steps)
RBW accuracy: ±12%
Video bandwidth range: 10 Hz to 3 MHz (1-3 steps)
Sweep
Sweep time
Sweep time: 20 ms to 1000 s (spectrum mode)
50 µs to 1000 s (zero span)
Accuracy: <±2% (zero span)
Sweep mode: REPEAT, SINGLE
Trigger
Source: Free, Video, EXT, IF
Amplitude range
Measurement range: Noise to +30 dBm
Maximum input level: Input attenuator: ≥10 dB
+30 dBm (preamplifier off)
+13 dBm (preamplifier on)
±15 VDC max.
Input attenuator range: 0 to 50 dB by 10 dB steps
Display range: 100, 50, 20, 10, 5 dB, Linear
Unit: dBm, dBmV, dBµV, dBµVemf, dBpW, W, V
Reference level range: -140 to 40 dBm
Detector: Normal, Posi-peak, Nega-peak, Sample, RMS
Amplitude accuracy
Calibration signal
Frequency: 20 MHz
Level: -20 dBm
Accuracy: ±0.3 dB
Scale fidelity
Log: ±0.5 dB/10 dB
±0.5 dB/80 dB
±0.2 dB/1 dB
Level measurement accuracy:After Cal., preamplifier: off;
temperature range: 20 to 30°C;
input attenuator: 10 dB; REF: 0 dBm;
and input signal level: -10 to -50 dBm
±1.5 dB (
9 kHz to 10 MHz)
±0.8 dB (
10 MHz to 3.1 GHz)
±1.0 dB (
3.1 to 8 GHz)
Dynamic range
Displayed average noise level: Frequency: 10 MHz to 8 GHz;
Ref. level: <-45 dBm; RBW: 300 Hz
Band 0, preamplifier: off: -118 dBm + 2 f (GHz) dB
Band 1, preamplifier: off: -117 dBm + 1 f (GHz) dB
Band 0, preamplifier: on: -133 dBm + 3 f (GHz) dB
Band 1, preamplifier: on: -134 dBm + 1.3 f (GHz) dB
Gain compression (1 dB): Frequency: 10 MHz to 8 GHz
Preamplifier: off: >-8 dBm
Preamplifier: on: >-25 dBm
Second harmonic distortion: <-70 dBc (preamplifier: off;
mixer level: -40 dBm; frequency: >200 MHz)
<-75 dBc typ. (preamplifier: off;
mixer level: -30 dBm; frequency: >300 MHz)
Third order intermodulation: -50 dBc (frequency: 10 MHz to 8 GHz;
preamplifier: off; mixer level: -20 dBm;
2-signal separation: 200 kHz)
Image/Multiple/
Out-of-band response: <60 dBc (image suppression: ON)
Residual responses: <-80 dBm (frequency: 10 MHz to 8 GHz;
preamplifier: off)
Inputs/Outputs
RF Input
Connector: N type female
Impedance: 50Ω (nominal)
VSWR:
<1.7 : 1 (<3.0 GHz), input attenuator: >10 dB
<2.0 : 1 (>3.0 GHz), input attenuator: >10 dB
Calibration output
Connector: BNC female
Impedance: 50Ω (nominal)
Frequency: 20 MHz
Level: -20 dBm
Frequency reference input
Connector: BNC female
Impedance: 50Ω (nominal)
Frequency [MHz]: 1, 1.544, 2.048, 5, 10, 12.8, 13, 13.824, 14.4,
15.36, 15.4, 16.8, 19.2, 19.44, 19.6608,
19.68, 19.8, 20, 26
Level: 0 to +16 dBm
External trigger input
Connector: BNC female
Impedance: 10 kΩ (nominal), DC coupled
Trigger level: 0 to +5 V
21.4 MHz IF Output
Connector: BNC female
Impedance: 50Ω (nominal)
Level:
Approx. mixer input level: +10 dB (at 20 MHz)
Battery mount
Connector: Antonbauer QR mount
External DC input
Connector: XLR-4
Voltage range: +11 to +17 V
GPIB: IEEE-488 bus connector
USB: USB1.1
Video output Connector: D-sub 15-pin female
LAN Connector: RJ45 type, 10/100 base -T
General specifications
Operating environment range
Temperature: 0 to +50°C
Humidity: Relative humidity: 85% or less
(without condencation)
Storage environment range:
-20 to +60°C, Relative humidity: 85% or less
AC power input:
Automatic switching to 100 VAC or 200 VAC
100 VAC: 100 to 120 VAC, 50/60 Hz
200 VAC: 200 to 240 VAC, 50/60 Hz
DC power input: DC: +11 to +17 V
Power consumption: 100 VA or less (A.C. operation)
70 W or less (D.C. operation)
Mass: 5.6 kg or less (without option)
Dimensions: approx. 308 (W) x 175 (H) x 209 (D) mm
(without protrusion)
approx. 337 (W) x 190 (H) x 307 (D) mm
(with handles, feet, and protectors)
U3751 Web Demonstration
More detailed information on the U3751 spectrum analyzer
and its features is available on the Internet.
Access the URL below to read it.
http://green.advantest.co.jp/techinfo_e/www_e/
demonstration_e/U3751/index.html