YAOGREENHAM jumbospot V1.3 MMDVM Simplex Duplex RX TX VHF OLED Board Kit P25 DMR YSF For Raspberry pi

Sellin:Our simplex and duplex syst all an offset of 0, which is our duplex system. Regardle of simplex or duplex, the offset is 0.We are using high-precision temperature compensated crystals, so it is 0We high cost TCXO crystal with extremely low bit error rate, offset of 0,and frequency error of 0This item link has 9 choosesSimplex is 1.7 versionChoose 1- Duplex Without Oled :Duplex MMDVM boardChoose 2- Duplex With Oled :Duplex MMDVM board with oled displayChoose 3- Simplex Without Oled:Simplex mmdvm boardChoose 4- Simplex With Oled :Simplex MMDVM board with oled display +Aluminum caseChoose 5 - Simplex case :Simplex MMDVM Aluminum caseChoose 6 - Simplex OLED case : Simplex MMDVM board with oled + caseChoose 7 -MMDVM PI Finished: SimplexMMDVM with oled display + raspberry pi + Aluminum case + 8G system tf cardChoose 8 -Mini Duplex: Duplex MMDVM board with oled displayChoose 9-2.2inch OLED: Duplex MMDVM board with oled displayThe default bit error rate is le than 5%, and the default offset is 0. If the bit error rate is more than 5%, as long as the signal can be received, it can be corrected by offset.Setting For Pi-star and raspberry hardware (rpi 0-3) new pi4b need remove Right Socket

Pi-star General Configuration forMMDVM_DUPLEX

Set Controller Mode:Duplex or Simple

Radio Frequency : Freq:144-148,219-225,(Main Band)420-475,842-950

Duplex Mode:Example:RX:438.000000 TX:433.000000

Duplex Mode:Example:RX:145.000000 TX:433.000000

Simple Mode:Example:RX:438.000000 TX:438.000000

Radio/Modem Type:ST2-DVM/MMDVM_HS-Raspberry pi Hat(GPIO) or any other (GPIO board)

option:(don't need now, some old board need set)

Admin->Expert->Edit MMDVMHOST->RXOFFSET=0 TXOFFSET=0 (default value in pistar)

(update:2019/2 new 3225 TCXO so offset is 0 )

update new FW: (pi-star / expert / h acce / r :pi-star pa:raspberry)

sudo pistar-mmdvmhshatf hs_dual_hat