The Keysight N7751A and N7752A are high-performance optical signal conditioning instruments combining a power-monitored attenuator with two extra front-panel power meter channels. Housed in a compact, half-width 1U rack-mount form factor, these instruments enable fast and precise setting of optical power levels with active power control alongside high-accuracy power measurements, maximizing throughput and reducing CAPEX in fiber optic test setups.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | LAN, USB, GPIB |
| Display | Graphical display |
| Power Consumption | 70 VA max. |
| Warm-up Time | 20 minutes |
| Operating Humidity Range | 15% to 95% R.H. (non-condensing) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 - 240 V AC ±10%, 50/60 Hz |
| Operating Temperature | 5 to 40 |
| Dimensions (W×H×D) | 213 mm x 44 mm x 348 mm |
| Weight | 3.3 |
Optical Power Meter Specifications
| Parameter | Value |
|---|---|
| Power Meter Sensor Type | InGaAs |
| Power Meter Wavelength Range | 1250 nm to 1650 nm |
| Power Meter Measurement Range | -80 dBm to +10 dBm |
| Power Meter Polarization Dependence | < 0.01 dB |
| Power Meter Maximum Safe Input Power | +16 dBm |
| Power Meter Averaging Time Range | 100 µs to 10 s |
| Power Meter Return Loss (typical) | > 57 dB |
Optical Attenuator Specifications
| Parameter | Value |
|---|---|
| Attenuator Settling Time (Attenuation) | 20 ms |
| Attenuator Settling Time (Power / APC) | 100 ms |
| Attenuation Transition Speed Range | 0.1 to 1000 dB/s (selectable) |
| Attenuator Maximum Input Power | +23 dBm |
| Attenuator Minimum Insertion Loss | ≤ 1.2 dB |
Active Power Control (APC) Mode Specifications
| Parameter | Value |
|---|---|
| Active Power Control (APC) Mode | Supported (keeps output power constant) |
Ordering and Calibration Options
| Parameter | Value |
|---|---|
| N7751A Channel Configuration | 1 Attenuator channel and 2 Power Meter channels |
| N7752A Channel Configuration | 2 Attenuator channels and 2 Power Meter channels |
Connectivity and Interface Specifications
| Parameter | Value |
|---|---|
| Optical Connector Interface | Keysight 81000xI exchangeable connector adapters |
| Remote Command Compatibility | Fully compatible with Agilent 8157x and 8156x modular attenuator SCPI programs |
Physical and Environmental Specifications
| Parameter | Value |
|---|---|
| Form Factor | 1U Half-Rack |
| Storage Temperature Range | -40 °C to +70 °C |
Attenuator Specifications
| Parameter | Value |
|---|---|
| Attenuator Wavelength Range | 1260 nm - 1640 nm |
| Attenuation Range | 0 to 45 dB |
| Attenuation Resolution | 0.001 dB |
| Attenuator Return Loss | > 45 dB |
Optical Specifications
| Parameter | Value |
|---|---|
| Fiber Type | 9/125 µm Single-Mode Fiber |
Optical Attenuator Performance
| Parameter | Value |
|---|---|
| Attenuation Repeatability | ±0.01 dB |
| Relative Attenuation Accuracy | ±0.05 dB (≤ 15 dB), ±0.10 dB (15 dB to 30 dB), ±0.20 dB (30 dB to 45 dB) |
| Polarization Dependent Loss (PDL) | < 0.05 dB (at 1310 nm and 1550 nm) |
| Insertion Loss Stability | < ±0.02 dB (over 24 hours at constant temperature) |
Optical Power Meter Performance
| Parameter | Value |
|---|---|
| Power Meter Total Uncertainty | ±4.5% (1250 nm to 1630 nm, -50 dBm to +10 dBm) |
| Power Meter Linearity | < ±0.05 dB (-60 dBm to +10 dBm) |
| Power Meter Data Buffer Size | 1,000,000 samples per channel |
| Power Meter Maximum Sampling Rate | 1 MHz |
Technology
InGaAs Power Meter & Optical Variable Attenuator
Applications
Fiber Optic Communications Test, Optical Transceiver Characterization, Receiver Sensitivity Testing