7 (13)

DA6180C.000

26 November, 2010

TYPICAL APPLICATION (Continued)

Table 4. Antenna Manufacturers and Antenna Types in Alphabetical Order for Time Signal Application

Manufacturer

Antenna Type

Dimensions

Web Link

C.E.C Coils

AP/AR Antenna Bars

http://www.ceccoils.com/CECWEB/index

.aspx?lang=en

HR Electronic

GmbH

60716 (60 kHz)

60708 (77.5 kHz)

ø 10 x 60 mm

http://www.hrelectronic.com/

Hitachi Metals

AN-T702Sxx

AN-T702Mxx

AN-T702Lxx

19 x 5.5 x 6.3 mm

28 x 5 x 5 mm

50 x 5 x 5 mm

http://www.hitachi-

metals.co.jp/e/prod/prod06/p06_12.html

Premo

RCA-SMD-77A (77.5 kHz)

RCA-SMD-60A (60 kHz)

75 x 15 x 6.3 mm

http://www.grupopremo.com/

Sumida

ACL80A (40 kHz)

ø 10 x 80 mm

www.sumida.co.jp/jeita/XJA021.pdf

Note 6: Time Signal Software’s Pulse Width Recognition Limits

The typical output pulse width specifications are presented in the electrical characteristics section on page 3. Due

to process variations the typical output pulse width can differ from these. Additionally the output pulse widths can

vary even more depending on the receiving antenna signal strength versus noise and disturbance conditions.

That is why it is important that the time signal decoding software has appropriate tolerance limits for managing

the output pulse width variations successfully. The table 5 presents recommended software pulse width tolerance

limits for recognizing pulses of different time signals.

Table 5. Recommended Software Pulse Width Recognition Limits for Different Time Signals

Parameter

Symbol

Min

Max

Unit

DCF77 Output Pulses

40

140

130

250

ms

MSF Output Pulses

T 100ms

T 200ms

T 500ms

50

170

400

160

300

600

ms

WWVB Output Pulses

T 200ms

T 500ms

T 800ms

100

400

700

300

600

900

ms

JJY60 Output Pulses

T 200ms

T 500ms

T 800ms

100

400

700

300

600

900

ms

JJY40 Output Pulses

T 200ms

T 500ms

T 800ms

100

400

700

300

600

900

ms