The LDM-4984RF is compatible with internal Bias-T modulated 14-pin butterfly laser modules. The specially designed RF modulation input block interfaces a 50Ω modulation source to internally–modulated lasers with a 25Ω input impedance on pin 12. A trim-capacitor is mounted on the RF block to optimize the modulation characteristics for your application. Zero insertion force (ZIF) sockets and spring-loaded clamps facilitate ease of mounting. The LDM-4989 features ILX Lightwaves standard 9-pin D-sub input connectors with configurable pin designations to accommodate virtually any laser diode pin configuration.