Modulation input: up to 100 kHz for applications using lock-in techniques or external control (on/off)
The Keysight 83437A can incorporate up to four edge-emitting LEDs (EELEDs), with five available wavelengths (1200 nm/-17 dBm, 1310 nm/-13 dBm, 1550 nm/-13 dBm, 1650 nm/-17 dBm).