Table of Contents
Advertisement
K
EYPAD
4.3.5.2 Bit6 - reserved
This bit is reserved and '0' must be entered.
4.3.5.3 Bit 5 and Bit 4: Display Control
Bit 5 and Bit 4 control the blanking of the display. This feature can be used to delay the loss
of brightness of the display (see Table).
If an input key is pressed during blanking the display is re-initialised with the standard output
and normal brightness. This condition is maintained for approx. 4 minutes from the last key
stroke.
4.3.5.4 Bit 3 to Bit 0: Selection of Synchronisation Source
The synchronisation source for the system 7001 is selected with Bits 3, 2, 1, and 0. The cor-
responding identification code for the selected synchronisation source appears in the display
(see Chapter 4.3.5 Control Byte).
All other settings for Bits 3-0 not shown in the Table give an ERROR indication on the dis-
play in place of the system identifier and are not provided with a synchronisation mode.
Safety system (in GPS_M+ or DCF_T+ sync. modes only)
The safety system requires 2 independent synchronisation sources for synchronisation. Both
pieces of time information must be in agreement not only in respect of time but also as re-
gards supplementary information such as time zone, switchover signalling bit etc., otherwise
no internal clock system synchronisation takes place and an error message is output simul-
taneously. These systems can be used for simple TIME-PROOF applications.
20 / 44
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: info@hopf.com
A master reset is always carried out automatically after selection of the syn-
chronisation source with Bits 3-0 and confirmation with the "ENT" key.
7001GPS Satellite Clock System - V08.00
Advertisement
Table of Contents
