| Parameter | Specification |
|---|---|
| Wavelength Range | 1300 nm – 1550 nm |
| Fiber Type | Single-mode (9/125 µm) |
| Attenuation Range | 0 dB – 60 dB (excl. insertion loss) |
| Resolution | 0.01 dB |
| Linearity | ±0.2 dB (0–60 dB span) |
| Return Loss (typical) | > 36 dB |
| Settling Time | < 20 ms for 0.01 dB step |
| Polarization Dependence | < 0.1 dB |
| Memory Retention | Non-volatile (> 10 years) |
| Interface | IEEE-488.2 (HP-IB), SCPI commands |
| AC Input | 100/120/220/240 VAC ±5 %/–10 %, 90 VA max |
| Operating Temp. | 0 °C to 50 °C |
| Storage Temp. | –40 °C to 70 °C |
| Humidity | 10 %–90 % RH non-condensing |
| Dimensions (H × W × D) | 89 × 214 × 356 mm (3.5 × 8.4 × 14.0 in) |
Specifications sourced from HP 8157A Datasheet and GlobalSpec overview.