With sufficient attention to antenna separation and filtering, it is possible to do this without interference from a transmitting radio to a receiving radio. In its most simple form, two transceivers feed two separate antennas on two different bands. The philosophy for SO2R development is to allow any two radios to be used they do not have to be identical. Even adding a few QSOs an hour will greatly boost your score. If you find a new station to work on the 2nd radio, you leave it staged on the 2nd Entry Window until you get a free moment to work this station. On the 2nd radio you are scanning the bands for needed QSOs and multipliers. Efficiency is increased by listening on a 2nd radio while you are transmitting on the 1st radio. This is accomplished by increasing your efficiency during slow times, for example, when you are CQing on one radio, but getting few answers. Single Operator 2 Radio (aka SO2R) is an operating technique that when done properly, can add many extra QSOs and multipliers to your log. Features common to both SO2V and SO2R are discussed in this section unless specifically indicated, they will work in both SO2V and SO2R. Many of the features of N1MM Logger+ work identically for SO2V and SO2R. Single Operator Contesting SO2V and SO2R Operation Split Mode and Frequencies Set Automatically from Cluster Spots.Setting Split Transmit Frequencies Manually.Two Band Split Interleaved QSO (2BSIQ) with the YCCC Controller.Basic SO2R LPT Port – Transmit Interface.Basic SO2R LPT Port – Receive Interface.Setting Internal DXD Jumpers to Enable Stereo Feature.LPT Keying with External SO2R Controllers Using LPT Port.SO2R – Single Operator Two Radio Operation.Approximating the Capability with Radios that do not have a Sub-Receiver.Advanced SO2V for Radios with Separate Sub-Receivers.Single Operator Two VFO Operation (SO2V).Setup DX, DXpedition, and General Purpose Contests.Windows – Table of Contents View (long).Call History and Reverse Call History Lookup.Archive Files (1/2021) – N1MM on WindowsXP.

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