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SPECTRUMANALYZERS

Name MS2681AMS2683AMS2687B Display frequency accuracy ±(Display frequency x reference frequency accuracy + span x span accuracy +resolution bandwidth x 0.15 + 10 Hz)±(Display frequency x reference fre-quency accuracy + span x span accura- cy + resolution bandwidth x 0.15 + 10 Hz x N Hz) Normal marker: same as frequency dis- play accuracy, Delta marker: same asspan accuracy

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N: Mixer harmonics order±(Display frequency x reference frequency accuracy + 2 Hz + 1 LSD)(at S/N 20 dB or more and RBW 3 MHz or less)Setting range: 0 Hz, and 5 kHz to 3.0 GHz, Accuracy: ±1.0% (at data point of 1001) Average noise level displayRBW: 300 Hz, VBW: 1 Hz, RF ATT 0 dB, in Sample detection mode[Without option 08] Frequency counter resolution1 Hz, 10 Hz, 100 Hz, 1 kHz (counts the received frequency at the peak point inside the zone) Frequency counter accuracy Frequency span Setting range: 300 Hz to 3 MHz (1, 3 sequence), 5 MHz, 10 MHz, 20 MHzResolution bandwidth

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Manually settable, or automatically settable according to frequency span(RBW) [3 dB bandwidth]Accuracy: ±20% (300 Hz to 10 MHz), ±40% (20 MHz)Selectivity (60 dB: 3 dB): ≤ 15 : 1 Video bandwidth (VBW)1 Hz to 3 MHz (1, 3 sequence), Off

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Manually settable, or automatically settable according to RBW ≤ –108 dBc/Hz (1 GHz, 10 kHz offset), ≤ –120 dBc/Hz (1 GHz, 100 kHz offset) Input attenuator (RF ATT)Setting range: 0 dB to 62 dB (2 dB step), manually settable, or automatically set-table according to reference levelSwitching uncertainty: ±0.3 dB (10 to 50 dB), ±0.5 dB (52 to 62 dB) ≤ –108 dBc/Hz (1 GHz,10 kHz offset), ≤ –120 dBc/Hz (1 GHz,100 kHz offset)Spurious resulting from local cause: Signal purity ≤ –65 dBc (at harmonic mixing order 1) Frequency: 10 MHzReference oscillatorStart-up characteristics: ≤ 5 x 10
–8 (after 10 minutes warm-up, with frequency after 24 hours warm-up referenced)Aging rate: ≤ –124 dBm + f [GHz] dB (1 MHz to 2.5GHz, band 0) ≤ ±2 x 10
–8 /day, ≤ ±1 x 10
–7 /year (with frequency after 24 hours of warm-up referenced)Temperature characteristics: ±5 x 10
–8 (0 to +50°C, with frequency at +25°C referenced) ≤ –120 dBm + f [GHz] dB (2.5 to 3.2GHz, band 0) Measurement range: Average noise level to +30 dBmMaximum input level: Continuous average power: +30 dBm (RF ATT: ≥ 10 dB)Peak pulse input: +47 dBm (pulse width ≤ –115 dBm (3.15 to 7.9 GHz, band 1) ≤ 1 µs, duty ratio ≤ –113 dBm (7.8 to 15.3 GHz, band 2) ≤ –124 dBm + f [GHz] dB (1 MHz to 2.5GHz, band 0) ≤ 1%, RF ATT: ≥ 30 dB)DC voltage: 0 Vdc ≤ –103 dBm (15.2 to 30.0 GHz, band 4)Residual response: RF ATT 0 dB, inputterminated at 50 ≤ –120 dBm + f [GHz] dB (2.5 to 3.2GHz, band 0) Ω≤ –100 dBm (1 MHz to 3.2 GHz, band 0), ≤ –122 dBm + 0.5f [GHz] dB (3.15 to 7.8GHz, band 1) [With option 08] ≤ –90 dBm (3.15 to 7.8 GHz, band 1) Input attenuator (RF ATT)Setting range: 0 to 70 dB (10 dB step),manually settable, or automatically set-table according to reference level Switching uncertainty: ±0.3 dB (10 to 50 dB), ±0.5 dB (50 to70 dB) ≤ ≤ –122 dBm + 1.5f [GHz] dB (1 MHz to2.5 GHz, band 0) –120 dBm + 1.5f [GHz] dB (2.5 to 3.2GHz, band 0) ≤ –124 dBm + f [GHz] dB (1 MHz to 2.5GHz) ≤ –122 dBm + 0.5f [GHz] dB (3.15 to 7.8GHz, band 1) Residual response: ≤ –100 dBm (1 MHzto 3.2 GHz, band 0), ≤ –120 dBm + f [GHz] dB (2.5 to 3.0GHz)[With option 08] ≤ –90 dBm (3.15 to7.8 GHz, band 1) Average noise level displayRBW: 300 Hz, VBW: 1 Hz, RF ATT 0dB, in SAMPLE detection mode Level measurement ≤ –122 dBm + 1.5f [GHz] dB (1 MHz to2.5 GHz) ≤ –120 dBm + 1.5f [GHz] dB (2.5 to 3.0GHz)Residual response: ≤ –100 dBm (1 MHzto 3.0 GHz) Average noise level displayRBW: 300 Hz, VBW: 1 Hz, RF ATT 0 dB, in Sample detection mode [Without option 08] Setting rangeLog scale: –100 to +40 dBm, or equivalent level, Linear scale: 2.24 µV to 22.4 VUnitLog scale: dBm, dBµV, dBmV, dBµV (emf), W, V, dBµV/mLinear scale: VReference level accuracy:±0.5 dB (–49.9 to 0 dBm), ±0.75 dB (+0.1 to +30 dBm, –69.9 to –50 dBm), ±1.5 dB (–80 to –70 dBm)

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After calibration, at 50 MHz, span: 1 MHz (when RF ATT, RBW, VBW, and sweep time set to AUTO)RBW switching uncertainty: ±0.3 dB (300 Hz to 5 MHz), ±0.5 dB (10, 20 MHz) Reference level

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After calibration, with RBW 3 kHz referenced

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After calibration, with 50 MHz, RF ATT 10 dB referencedInput attenuator switching mode: 2, 10 dB step mode Noise sideband:

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With 50 MHz, RF ATT 10 dB refer-enced Setting range: 0 Hz, and 5 kHz to 7.8 GHz, Accuracy: ±1.0% (at data point of 1001)Setting range: 0 Hz, and 5 kHz to 30 GHz,Accuracy: ±1.0% (band 0,1), ±2.5% (band 2, 4)At single band sweep, data point 1001 ±(Display frequency x reference fre-quency accuracy +2 Hz + 1LSD) (at S/N 20 dB or more and RBW 3 MHzor less) Noise sideband: Continued on next page

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