iE2820 - Permo Electronics

OTHER FUNCTIONS14D Adjusting the transmit signal output fromthe TNCWhen setting data transmission speed to 9600 bps, the datasignal coming from the TNC is applied exclusively to the internallimiter circuitry to automatically maintain band width.NEVER apply data levels from the TNC of over 0.7 V p-p, otherwisethe transceiver will not be able to maintain the bandwidth and may possibly interfere with other stations.1. When using a level meter or oscilloscope, adjust theTX audio output level (DATA IN level) from the TNC asfollows.0.7 V p-p (0.35 V rms) : recommended level2. When NOT using a measuring device.q Connect the transceiver to a TNC.w Enter a test mode (“CALL”, etc.) on the TNC, then transmitsome test data.e When the transceiver fails to transmit the test data ortransmits sporadically (TX indicator doesn’t appear orflashes):- Decrease the TNC output level until the transmit indicatorlights continuously.When transmission is not successful even though theTX indicator lights continuously:- Increase the TNC output level.D Packet operation band selectionBoth bands, or either the left or right band only, can be specifiedfor packet operation to suit your preference.q Push [F• ] to display function guide.w Push [MENU](V/MHz•SCAN) (Right band’s) to enter MENUscreen.e Rotate [DIAL] to select “PACKET” then push[MAIN•BAND].r Rotate [DIAL] to select “PACKET BAND” then push[MAIN•BAND].t Rotate [DIAL] to select desired band from MAIN (default),left (L) and right (R), then push [MAIN•BAND].• MAIN : The main band is used for packet operation.• Left (L)/Right (r) : The selected left or right band can onlybe used for packet operation.y Push [BACK](V/MHz•SCAN) (Right band’s) twice to returnto frequency indication.12345678910111213141516171819120