JJY driver for NTP

Home Page

ENGLISH

JAPANESE

Last updated
Jun 24, 2020

NTP Home page	http://www.ntp.org/
Reference Clock Drivers	http://www.eecis.udel.edu/~mills/ntp/html/refclock.html
Type 40 ( JJY receivers)	http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver40.html
Latest/Next html	The latest driver40.html
NTP Archive	http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/

Apr 29, 2020 The Tristate Ltd. JJY-01, 02 can synchronize time only when the reply of the STUS command is 'adjusted'.

If both flag1 and flag2 are set to 1, the Tristate Ltd. JJY-01, 02 synchronizes time only when the reply of the STUS command is 'adjusted'.
The enhancement patch file were reported to the NTP project. This patch file is planed to apply to next release 4.2.8p15.
Jun 24, 2020: This patch file has been applied to ntp-4.2.8p15.tar.gz.

May 09, 2016 The patch for the C-DEX JST-2000 driver of the NTP 4.2.8p7 and 4.3.92.

The patch fixes the problem of the JST-2000 driver of the NTP 4.2.8p3 - 4.2.8p7 and 4.3.24 - 4.3.92.
The existing bug and the patch file were reported to the NTP project.
Nov 11, 2016: The complete souce code files and document files, applied this patch file, are ntp-4.2.8p9.tar.gz or later in the NTP archive.

Jun 25, 2015 New refclock_jjy.c for the SEIKO TIME SYSTEMS INC. TDC-300

The new JJY driver supports the SEIKO TIME SYSTEMS INC. TDC-300.
The complete souce code files and document files are 4.2.8p3-RC2 and ntp-dev-4.3.34.tar.gz or later in the NTP archive.

May 12, 2015 New refclock_jjy.c for the Telephone JJY

The new JJY driver supports the Telephone JJY.
The complete souce code files and document files are 4.2.8p3-RC1 and ntp-dev-4.3.26.tar.gz or later in the NTP archive.

I have tested myself and have ensured that this driver runs with the following modems.

OUTDOOR, USB connection 56K analog telephone line FAX/DATA(14.4K)
IO DATA, DFML-560EMR RS-232C serial connection V.90 56K DATA & FAX
RATOC SYSTEMS, RS-232C 56K DATA / 14.4K FAX

I would be grateful if you could send a modem operation report to , it will be listed above.

May 05, 2011 New refclock_jjy.c for the Tristate Ltd. TS-GPSclock-01

The new JJY driver supports the Tristate Ltd. TS-GPSclock-01.
The complete souce code files and document files are ntp-dev-4.2.7p162.tar.gz or later in the NTP archive.

TS-GPSclock-01 should be set to as follows;

Time zone	:	Japan Standard Time (JST)
Mode	:	Command/Response mode

The TS-GPSclock-01 in command/response mode works as the reference clock for this driver ( Type 40, JJY receivers ), also the TS-GPSclock-01 in NMEA mode works as the reference clock for the generic NMEA driver ( Type 20, Generic GPS NMEA ).

May 03, 2009 New refclock_jjy.c for CITIZEN T.I.C. CO.,LTD. JJY-200

The new JJY driver supports the CITIZEN T.I.C. CO.,LTD. JJY-200.
The complete souce code files and document files, applied these patch files, are ntp-4.2.4p7-RC6.tar.gz and ntp-dev-4.2.5p173.tar.gz or later in the NTP archive.

Nov 04, 2006 The patch for the C-DEX JST-2000 driver of the NTP 4.2.2.

The patch fixes the problem of the JST-2000 driver of the NTP 4.2.2.
The existing bug and the patch file were reported to the NTP project.
The complete souce code files and document files, applied this patch file, are ntp-dev4.2.3p63-RC.tar.gz or later in the NTP archive.

Nov 28, 2004 New refclock_jjy.c for Echo Keisokuki Co.,Ltd. LT-2000

The new JJY driver supports the Echo Keisokuki Co.,Ltd. LT-2000.
The complete souce code files and document files, applied these patch files, are ntp-dev-4.2.0a-20050109.tar.gz or later in the NTP archive.

Nov 02, 2004 The patch for the new version of the Tristate Ltd. JJY-01.

The patch fixes the problem of the JJY-01 with the new hardware and/or new firmware version 2.
The complete souce code files and document files, applied these patch files, are ntp-dev-4.2.0a-20041122.tar.gz or later in the NTP archive.