| Measurement functions |
Optical power measurement (dBm)
Measure absolute value of input optical power
Optical loss measurement (dB)
Automatically compare measured power with previously input
reference value to calculate and display loss |
| Calibration wavelength |
850 nm, 1310 nm, 1550 nm |
| Range |
-60 dBm to +9 dBm (auto range) |
| Accuracy |
±0.22 dB (±5 %) at-10 dBm |
| Resolution |
0.01 dBm (optical power), 0.01 dB (optical loss) |
| Rated max. |
+10 dBm |
| Connector |
FC, SC (using optional connector adapter) |
| Fiber type |
Single mode, multi mode (core dia. 62.5 µm max. NA: 0.275 max.) |
| Light receiver |
InGaAs (dia. 1 mm) |
| Display update rate |
Approx. 3 times/s (approx. 350 ms) |
| Memory |
Max. 1000 data per wavelength |
| Interface |
USB (Ver. 1.1)
Dedicated PC application software allows transfer of
measurement data from the 3661-20 memory to a computer |
| Functions |
Auto power save (after about 10minutes of inactivity; defeatable)
Settings backup (settings are automatically stored at power-off)
Battery check (symbol appears when voltage drops below approx. 4 V) |
| Power supply |
LR6(AA) alkaline battery × 4, 0.5 VA |
| Operating time |
Approx. 40 hours (continuous use) |
| Dimensions and mass |
85 mm(3.35)W × 192 mm(7.56)H (including 36 mm cover) × 35 mm(1.38)D,
300g(10.6 oz) (without batteries) |
| Accessories |
CARRYING CASE 3853 (1), Strap(1) |
