# Modulation bandwidth using analog I and Q input with LPF bypassed
**URL:** https://discourse.myriadrf.org/t/modulation-bandwidth-using-analog-i-and-q-input-with-lpf-bypassed/213
**Category:** Reference Development Kit
**Created:** [17 September 2015 19:37 UTC](https://discourse.myriadrf.org/t/modulation-bandwidth-using-analog-i-and-q-input-with-lpf-bypassed/213 "2015-09-17T19:37:41Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@rschmid](https://discourse.myriadrf.org/u/rschmid)
#### Post date: [17 September 2015 19:37 UTC](https://discourse.myriadrf.org/t/modulation-bandwidth-using-analog-i-and-q-input-with-lpf-bypassed/213/1 "2015-09-17T19:37:42Z")
If the DAC is disabled and TXINI and TXINQ are used as the analog inputs, what modulation bandwidth can be achieved if the LPF is bypassed using address 0x35 bit 6 (BYP\_EN\_LPF)?
Is this extended modulation bandwidth with the LPF bypassed the same for the transmit and receive paths (ADC disabled and RXOUTI/RXOUTQ used with 0x55 bit 6 set high)?
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### Author:  [@RicardasVadoklis](https://discourse.myriadrf.org/u/RicardasVadoklis)
#### Post date: [25 September 2015 14:09 UTC](https://discourse.myriadrf.org/t/modulation-bandwidth-using-analog-i-and-q-input-with-lpf-bypassed/213/2 "2015-09-25T14:09:15Z")
Hello,
Yuu would be able to achieve about 42 MHz (RF) BW. Same for receiver.
Best,
Rich
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### Author:  [@rschmid](https://discourse.myriadrf.org/u/rschmid)
#### Post date: [25 September 2015 14:16 UTC](https://discourse.myriadrf.org/t/modulation-bandwidth-using-analog-i-and-q-input-with-lpf-bypassed/213/3 "2015-09-25T14:16:43Z")
Great. Thanks for your reply. If and when I end up getting my boards together, I’ll be sure to provide feedback on any testing I do in this configuration.