Keysight N7751A 整合了两个前面板功率计通道，以低价格提供出色的性能。在考虑衰减器输出时，功率计可在测量设置的任意点上进行测量，并且有助于功率偏置校准。
N7751A 衰减器作为高密度 Keysight N77xx 系列的拓展产品，确立了光纤仪器在节省空间方面的新标准。
Single-mode fiber optical attenuators N7751A, N7752A, N7761A, N7762A, N7764A Connectivity FC/APC angled (Option -022) or FC/PC straight (Option -021) contact connector interface Fiber type 9/125 μm SMF 28 Wavelength range 1260 nm to 1640 nm Attenuation range 0 dB to 40 dB (45 dB typ.) Attenuation setting mode Power setting mode Range 0 dB to 40 dB –50 dBm to +20 dBm Resolution 0.01 dB 0.01 dB Repeatability1 typ. ± 0.05 dB for attenuation 0 dB to 30 dB typ. ± 0.10 dB for attenuation 30 dB to 40 dB ± 0.025 dB Accuracy (uncertainty) 1 – 3 typ. ± 0.10 dB for attenuation 0 dB to 10 dB typ. ± 0.15 dB for attenuation 10 dB to 20 dB typ. ± 0.40 dB for attenuation 20 dB to 40 dB Relative accuracy (uncertainty) ± 0.05 dB ± 300 pW Polarization dependent loss 5 typ. ≤ 0.15 dBPP for attenuation 0 dB to 10 dB typ. ≤ 0.25 dBPP for attenuation 10 dB to 20 dB typ. ≤ 0.5 dBPP for attenuation 20 dB to 40 dB ≤ 0.15 dBPP 6 Settling time typ. 20 ms 7 typ. 100 ms 6 Insertion loss 8 typ. ≤ 1.2 dB (excluding connectors) ≤ 2.2 dB (including connectors) 9 Attenuation transition speed selectable from 0.1 to 1000 dB/s Relative uncertainty of monitor power meter 2, 10 ± 0.05 dB ± 300 pW Averaging time of monitor power meter 2 ms to 1 s Return loss typ. 45 dB Maximum safe input power +23 dBm if applied to input port; < +18 dBm if applied to output port Optical path blocking typ. 45 dB
N7751A, N7752A, N7761A, N7762A, N7764A
Connectivity
FC/APC angled (Option -022) or
FC/PC straight (Option -021) contact connector interface
Fiber type
9/125 μm SMF 28
Wavelength range
1260 nm to 1640 nm
Attenuation range
0 dB to 40 dB (45 dB typ.)
Attenuation setting mode
Power setting mode
Range
0 dB to 40 dB
–50 dBm to +20 dBm
Resolution
0.01 dB
Repeatability1
typ. ± 0.05 dB for attenuation 0 dB to 30 dB
typ. ± 0.10 dB for attenuation 30 dB to 40 dB
± 0.025 dB
Accuracy (uncertainty) 1 – 3
typ. ± 0.10 dB for attenuation 0 dB to 10 dB
typ. ± 0.15 dB for attenuation 10 dB to 20 dB
typ. ± 0.40 dB for attenuation 20 dB to 40 dB
Relative accuracy (uncertainty)
± 0.05 dB ± 300 pW
Polarization dependent loss 5
typ. ≤ 0.15 dBPP for attenuation 0 dB to 10 dB
typ. ≤ 0.25 dBPP for attenuation 10 dB to 20 dB
typ. ≤ 0.5 dBPP for attenuation 20 dB to 40 dB
≤ 0.15 dBPP 6
Settling time
typ. 20 ms 7
typ. 100 ms 6
Insertion loss 8
typ. ≤ 1.2 dB (excluding connectors)
≤ 2.2 dB (including connectors) 9
Attenuation transition speed
selectable from 0.1 to 1000 dB/s
Relative uncertainty of monitor power meter 2, 10
Averaging time of monitor power meter
2 ms to 1 s
Return loss
typ. 45 dB
Maximum safe input power
+23 dBm if applied to input port; < +18 dBm if applied to output port
Optical path blocking
N7751A and N7752A
Sensor element
InGaAs
Specification wavelength range
(1310 ± 15) nm, (1490 ± 10) nm, (1550 ± 15) nm
Power range
–80 dBm to +10 dBm
Maximum safe power
+16 dBm
Averaging time
2 ms to 1s
Applicable fiber type
Standard SM and MM ≤ 62.5 μm core size, NA ≤ 0.24
Uncertainty at reference conditions 1, 3
± 2.5%
Total uncertainty 2, 5, 6
± 4.5%
Linearity 7
at (23 ± 5)°C
over operating temperature
± 0.02 dB
± 0.04 dB
Polarization dependent responsivity (PDR) 3, 8
typ. < ± 0.01 dB (1260 nm to 1580 nm)
Spectral ripple (due to interference) 10
typ. < ± 0.01 dB
Drift (dark) 4
± 9 pW
Noise pp (dark) 3, (1s averaging time, 300s observation time)
< 7 pWpp
Return loss 9
typ. > 57 dB
