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No, HD1 don't support cross-band repeater function. It only support cross-band receive and transmit.
What's the Cross-Band Repeater Function? Do you have radio have this function?
Retevis RT23 supports cross-band repeater function. Turn on the cross-band repeater function(menu 6). You can choose one-way or two way repeater(menu 34). One way(single) means the repeater’s receive and transmit frequencies are specific. The radio will show 162R2375,426T2375. It indicates the repeater only can receive 162.2375,transmit 426.2375. Two way(double) means the repeater’s receive and transmit frequencies are random. The radio will show 162*2375,426*2375. It indicates the repeater not only can receive 162.2375,transmit 426.2375, but also can receive 426.2375,transmit 162.2375. Cross-Band Repeater function also can increase the distance of communication. If you choose two way repeater, it canmake the UHF radio communicate with VHF radio. When you turn on the repeater function, you also can set if the radio PTT Transmitting(menu 33) and Speaker(menu 32) is available. For example: (1)RT23 radio A: RX 426.2375MHz, Offset: – 264.000MHz RT23 radio B: RX 426.2375MHz, Offset: – 264.000MHz RT23 radio C: Repeater RX 162.2375MHz, Offset: + 264.000MHz Radio A could communicate with Radio B,It also can increase the distance of communication. (2)RT23 radio A: RX&TX 162.2375MHz RT23 radio B: RX&TX 426.2375MHz, RT23 radio C: Two-way Repeater 162.2375MHz, Offset: + 264.000MHz Radio A could communicate with Radio B
What's the cross-band receive and transmit?
You can set it on the HD1 CPS. Set a channel, the transmit frequency is UHF/VHF, receiving frequency is VHF/UHF. You can refer to this video. https://www.youtube.com/watch?v=mWRo3p0-mwE&t=2s