# Garmin 18X 5hz + FreeBSD + NTPD

**URL:** <https://community.ntppool.org/t/garmin-18x-5hz-freebsd-ntpd/3517>\
**Category:** Server operators\
**Created:** [September 17, 2024, 6:35am UTC](https://community.ntppool.org/t/garmin-18x-5hz-freebsd-ntpd/3517 "2024-09-17T06:35:53Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![elvisimprsntr](https://avatars.discourse-cdn.com/v4/letter/e/43a26b/32.png) [@elvisimprsntr](https://community.ntppool.org/u/elvisimprsntr)\
**Post date:** [September 17, 2024, 7:29am UTC](https://community.ntppool.org/t/garmin-18x-5hz-freebsd-ntpd/3517/2 "2024-09-17T07:29:41Z")

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@xymox Welcome!

I don’t believe NTPD supports 5Hz PPS signaling. Others have used 5Hz PPS with Chrony/GPSD with debatable benefit. [Ordered me a new GPS - #8 by Bas](https://community.ntppool.org/t/ordered-me-a-new-gps/3251/8)

I am able to achieve approximately +/- 1.5 usec offset with the 1Hz PPS signal connected to my [pfSense](https://pfsense.org) firewall. I increased the baud rate to 38400 to reduce fudge time2. 5Hz/10Hz PPS doesn’t seem to be worth the additional time and expense in my application.

> **[GitHub - elvisimprsntr/pfsense-ntp-gps: pfSense NTP GPS Server](https://github.com/elvisimprsntr/pfsense-ntp-gps)**
>
> pfSense NTP GPS Server

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