OM20 Universal Outdoor Modem IntroductionTM116 – Rev. 1.2 1-1Introduction1This chapter provides an overview of the OM20 Outdoor Modem. The OM20 system can supporta C-Band with power levels of 2, 5 and 10 watts or Ku-Band with output powers of 2, 4 and 8watts.Figure 1.1. Outdoor Modem (OM20) without protective shroud1.0 OverviewRadyne’s OM20 outdoor modem is based on Radyne’s DMD20/LBST modem product platform.The Transmit IF output and Receive IF input frequencies of the OM20 are 950 to 2050 MHz. Themodem operates over a data rate range of 2.4 Kbps to 20 Mbps in 1 bps steps including at allstandard IBS and IDR Data rates up to 8.448 Mbps. A full range of Industry Standard DataInterfaces is available for the OM20. Interface types are selectable from EIA-530 (J3), Ethernet(J4), optional ITU G.703 (Unbalanced on J10/11, Balanced on J3), and an optional ASI (J10/11).The OM20 is available with optional feed mounted C or Ku-Band LNB’s for the downlink, andoptional feed mounted 2/4/8 Watt Ku-Band or 5/10 Watt C-Band BUC’s for the uplink.The OM20 supplies DC voltage and 10 MHz reference to the BUC and LNB via the IF Cables.The output from the TX Port (J8) consists of the L-Band output frequency, high-stability 10 MHzreference, and an optional 24 or 48 Volts to the BUC. The RX Port I/O (J7) consists of the L-Band input frequency (from the LNB), high-stability 10 MHz reference and 13, 15, 18, and 21volts. The OM20 has the capability to enable and disable the BUC/LNB voltages and 10 MHzreference.
